Abstract
In the present paper, experimental and statistical studies of wear behavior of two HVOF sprayed coatings (NiCr-WC10Co4Cr (Coat1) and WC10Co4Cr (Coat2)) deposited on 304L austenitic stainless steel have been investigated. Applied load, sliding velocity, and distance are the most important parameters that directly affect the wear volume of a given coating. In order to quantify the influence of each parameter on the wear rate of both coatings, two different loads (5 and 15 N), velocities (5 and 20 cm/s), and distances (500 and 1500 m) are selected to perform the experimental study. The microstructural study conducted on both coatings using scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique reveals a dissolution of WC particles into the NiCr matrix with the formation of W2C eutectic phase that affects the coatings during tribology tests. The wear mechanism appears to be abrasive for Coat2 and combined mechanism of adhesive and abrasive wears in the case of Coat1. Based on the mathematical model developed using response surface methodology (RSM), the results show that both coatings yield the same response in terms of RSM individual output. In addition, RSM reveals that the normal load is the most significant individual parameter affecting wear volume with t-ratio of 46.11 and 32.00 of Coat1 and Coat2, respectively. However, the interaction of parameters is different regarding the nature of the coating. Normal load-sliding velocity interaction is the most influencing in Coat1, while Coat2 wear behavior is more influenced by sliding distance-normal load interaction.
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1 Introduction
Improving the surface properties by developing a coating of high density, high bond strength, high hardness, and refined microstructure is the prime requirement of surface engineering for enhanced performance against wear [1]. From an economical perspective, wear is considered as a critical problem in industries, which limits the good behavior and lifetime of materials’ surface in tribological point of view [2, 3]. Abrasive and adhesive wears cause the failure of engineering components that are subjected to friction in the industry [1, 4]. Therefore, surface modification is required to increase the life span of mechanical parts used in severe working conditions [5]. Among the techniques used to enhance the surface characteristics is coating. Thermal spray is an effective method for surface characteristic modification of engineering compounds widely used in several industrial applications where high-velocity oxy fuel (HVOF) spray technique of hard materials coating is the most technique used in aeronautic, sand pumps, and tool bit coating [6]. In fact, a low porosity level and very high adhesion strength of various cermets and composite materials such as: WC-Co, NiCr and Cr3C2 are guaranteed by HVOF technique compared to other coating processes [7, 8]. NiCr-based alloy is generally used as a binder with hard particles; it provides good resistance against corrosion and oxidation of the coating with high wettability level for the cermet (adhesion improvement) [9, 10]. Considerable attention has been paid to WC-Co-Cr composite HVOF spraying due to the well-adhered and dense coating, which combine good stiffness of WC and high toughness of Co and Cr elements. In fact, wear resistance of WC particles with high hardness combined with the tough and ductile CoCr matrix enable the wide application of the composite in severe working conditions [11, 12].
The interaction between the various parameters during wear tests raises much difficulty to understand the effect of individual parameters on the wear behavior of the studied material. Hence, modeling exhibited for a long time the potential to solve complicated problems, with reduced test number and optimized the results [13]. Response surface methodology (RSM) has become an effective statistic method widely employed to solve engineering problems and the interpretation of the technical result. The input variables influence some performance over the output variables. RSM provides quantitative measurements of possible interactions between parameters, which are difficult to obtain using other techniques of optimization [14, 15]. Several research works have investigated the application of RSM to optimize the characteristics of a given process. This method reduces remarkably the number of trials required to respond to the model [16,17,18,19]. Therefore, many previous works highlighted the impact of wear parameters of the coating behavior using this method. Sail et al. [20] investigated the effects of sliding velocity, sliding distance, and normal load on output responses (dynamic friction coefficient, wear volume, and total roughness) by sliding wear test onto (Ti-W-N) coating using pin-on-disk machine. They found that the dynamic coefficient of friction decreases linearly with the increase in normal load basing on RSM. In addition, there is a proportional increase in the wear volume as the sliding distance increases, whereas a slight increase can be seen when the normal load is increased. According to Sharma et al. [21], the load and sliding distance have severe effect on abrasive wear of the coating as compared to abrasive size of Ni-WC-CeO2 composite HVOF sprayed coatings. On the other side, Saravanan et al. [18] optimized wear behavior of bio-compatible TiN material coated on 316L SS against Ti alloy using RMS. They concluded that the minimal specific wear rate and coefficient of friction were obtained when adjusting the optimal input parameters of sliding. Hence, this method shows the potential to be a procedure that deals with the responses influenced by multi-variables such as wear parameters. There is limited information dealing with using RSM to study the tribological behavior of WC-based hard coatings. This work aims to figure out the individual and combined impacts of wear parameters (load, distance, and velocity) on the wear volume of two different coatings (NiCr-WC10Co4Cr (Coat1) and WC10Co4Cr (Coat2)) deposited on 304L stainless steel using HVOF process. In addition, the optimal conditions at which the wear volume is the lowest are determined, based on desirability function method developed by Derringer and Suich [22], which is widely used to solve problems linked to the optimization of multiple responses related to the industry. Experimental and statistical investigations of the tribological behavior of the coatings is conducted. RSM modeling technique is used to estimate the effect of the experimental parameters on the tribological performance (friction coefficient and wear mechanisms) of both coatings.
2 Materials and experimental procedures
The substrate considered in this work is 304L austenitic stainless steel (304L SS), widely used in various aggressive environments because of its excellent corrosion resistance. However, the tribological proprieties of this material need to be improved when it is used in severe wear conditions, such as downhole tools. The nominal composition for substrate is (wt.%) C 0.03%, Si 1.00%, Mn 2.00%, P 0.045%, S 0.03%, Cr 19.5%, Ni 10%, and Fe (balance) (Depery Dufour, France). NiCr and WC10Co4Cr powders are achieved by an atomization process and have a particle size ranging from about 15 to 45 μm (Wisdom Company, Shanghai, China). The SEM analysis of these powders is shown in Fig. 1. The shape of both powders is nearly spherical with a certain degree of porosity regarding WC10Co4Cr powder. The nominal chemical composition (wt.%) was obtained by EDS analysis. From Fig. 1a, NiCr powder presents 76.96% of Ni and 23.04% of Cr. From Fig. 1b, WC10Co4Cr powder presents 89.88% of W, 7.35% of Co, and 2.78% of Cr. Using the HVOF process; the selected parameters for spraying operation are presented in Table 1. The powders are sprayed using an HJ2700 gun (Metalizing Equipment Corporation LTD, Rajasthan, India). Disks of 25-mm diameter and 5-mm thickness (304L SS) were coated by two coatings: NiCr-WC10Co4Cr (Coat1) and WC10Co4Cr (Coat2) with a thickness of about 300 μm.
The microstructures of the powders, the coatings, and worn surfaces were examined by SEM (JEOL, JSM6830, Japan) equipped with an energy-dispersive spectroscopy (EDS) apparatus. XRD analyses were performed using a Philips diffractometer, with 40 kV, a Cu (Kα) = 0.15406 nm, and a step size 0.05°/s. The recorded XRD patterns are characterized by PANalytical X'Pert High Score software; the average phase fractions were determined by XRD data sets for each sample.
In order to determine the mechanical properties of coatings’ phases, nano-indentation measurements were carried out. Using Nanoindenter (Anton Paar NHT-3) with Berkovich tip under 100-mN applied load, the test was conducted onto the matrix and reinforcements (carbide). The final values of hardness and Young’s modulus were obtained for an average value of 3 tests.
Tribological tests were carried out on a ball-on-disk tribometer (CSM tribometer, CSM instruments inc, Peseux, Switzerland), according to ASTM G99-0516. The disk was initially cleaned with acetone. The tests were carried out by applying normal loads of 5 and 15 N and run for two sliding distances of 500 and 1500 m at two different sliding velocities of 5 and 20 cm/s. The level’s factors of testing methodology are presented in Table 2. An Al2O3 ball of 6 mm is placed in contact with the sample surface. All tests were conducted at room temperature under dry laboratory conditions, by considering 10 mm as tribological diameter. During sliding, the friction coefficient (CoF) was continuously measured and recorded in real time by the computer software of the tribometer (TriboX). The width of the wear track (d) was determined via micrographs using optical microscopy (Eclipse 3000, Nikon Instruments, Melville, NY, USA) and image analysis software (ImageJ). At least four measurements were taken per sample at different positions over the wear track, and the average values were reported. At the end of each test, the wear volume (W) in mm3 of each specimen is calculated using Eq. (1).
where R is the radius of the wear track (mm), d is the width of the wear track (mm), and r is the radius of the ball (mm).
In this work, a full 23 factorial design that requires eight experiments is used to study the importance of the individual effects and the interactions of test parameters on the wear volume. The chosen design helps to reduce the number of experiments and the time to reach the appropriate model for the optimization process. The 2k represents the number of experiments, and k is the number of factors. Three input variables such as sliding distance (m) “X1,” normal Load (N) “X2,” and sliding velocity (cm/s) “X3” have been varied. Hence, one response is evaluated as an experimental wear volume (mm3) and is denoted as “Y1” and “Y2” for NiCr-WC10Co4Cr and WC10Co4Cr coating, respectively.
The results of the factorial design were studied and interpreted statistically based on analysis of variance (ANOVA), and the determination of coefficient R2 was calculated using the JMP 13 software. The significance of the regression coefficient parameters is discussed by Student’s t-test. The choice of distance (m) “X1,” normal Load (N) “X2,” and sliding velocity (cm/s) “X3” is among the most important parameters that affect the wear volume [20]. The higher level is designated by +1 and the lower level by −1, which appears in Table 2 for the parameters studied. Hence, the design matrix of coded values for different factors which are codified with mathematical model for the 23 is given as:
The response Y is considered as the experimental wear volume (mm3). The run order of experiments is carried out from the right to the left to correct the possible experimental errors based on the Yates’ algorithm and applied in the case of all 2k factorial experiments [23, 24].
In as much as Y represents the experimental wear volume (mm3), the constants a0, ai, and aij represent the global mean. The regression coefficients are assigned respectively to the principal factor effects and interactions.
3 Results and discussion
3.1 Surface coating and tribological behavior
Figure 2a and b show the cross-sectional microstructure of NiCr-WCCoCr (Coat1) and WCCoCr (Coat2) coatings, respectively. Both coatings exhibit a thickness of about 300 μm with no cracks or delamination defects with a good adhesion aspect of coatings/substrate interfaces as shown in Fig. 2c and d. It is seen that particles in Coat1 and Coat2 are partially melted where Coat2 shows higher interparticle porosity level compared to Coat1, which are in good agreement with the findings in previous research works [25, 26]. XRD patterns of the feedstock powders and the as-sprayed coatings (Coat1 and Coat2) are shown in Fig. 3a, b, c, and d). The XRD results of the powders (Fig. 3a and b) show that NiCr and WC are the most prominent phases, while Ni and Co exhibit small peaks indicating their small content. The as-sprayed coatings reveal the presence of a new W2C phase in both coatings (Fig. 3c and d) with a broad peak observed between 40 and 50° in Coat2 (Fig. 3d) that may be related to the differential dissolution of the WC carbide in the NiCr matrix and to the presence of partially amorphous/fine crystalline phases [27]. On the other side, it can be seen that, after HVOF spraying, the peaks of WC and NiCr phases shift due to residual stresses induced by the plastic deformation of the particles during their interaction with the substrate surface at high temperature. Furthermore, it can be observed the disappearance of Co peak in Coat2, which is probably attributed to the dissolution of W element into the Co-Cr matrix and the formation of W-Cr-Co amorphous phase after rapid solidification [28, 29]. In addition, the decarburization degree of WC particles and the formation of W2C eutectic phase are lower in Coat2 compared to that in Coat1. This phenomenon can be explained by the high chemical affinity between Cr and C elements that accelerates the WC particle dissolution in Coat1 due to the presence of high amount of Cr element in the matrix. Similar results were reported in the previous works [7, 28, 29] when HVOF spray is used to deposit such materials.
Figure 4 shows SEM micrograph of the as sprayed Coat1 with the corresponding EDS mapping analysis. It is seen that the WC particles change their original spherical shape and transform into splat-like structure due to the plastic deformation generated during the impact of the particles on the steel substrate surface at high temperature and velocity. The EDS mapping analysis reveals the heterogeneous distribution of C element throughout the coating; it is accentuated where W and Cr elements were located. This confirms the presence of WC, CrC carbides, and more probably W2C eutectic carbide already found by XRD experiments. On the other side, homogeneous distribution of Ni and Cr elements is observed through the Coat1-substrate interface, which may reflect the good metallurgical bonding of the coating. The interaction between WC particles and the steel substrate in Coat2 with the EDS mapping analysis is illustrated in Fig. 5. It can be seen that no inter-diffusion of elements along the Coat2-substrate interface is allowed when WC particles are at the vicinity of the substrate. The WC-steel contact results in poor metallurgical bonding and weakens the interface by inhibiting the element diffusion activity throughout the interface, which may have a direct effect on the coating properties. On the other side, the EDS point analysis conducted in Coat1 (Fig. 6 and Table 3) reveals that the concentration of W element (spot D) decreases from the middle of WC particle, to 83 wt. % (spot B), to the interface with the NiCr matrix (spot A), suggesting that the dissolution of WC particles into the matrix due to the solubility of W in Ni (~ 9%), in agreement with the W-Ni binary phase diagram. The low-contrast zones present in the carbide (C and E) contain significant amount of Ni; that could be attributed to the new eutectic phases such as W2C and W4Ni [30].
Nano-indentation measurements conducted in the matrix and carbide of Coat1 (NiCr-WC10Co4Cr) are shown in Fig. 7a. As expected, the penetration depth in the load-displacement curves was found to be greater on the matrix compared with the carbide. Furthermore, the slope of the unloading segment of the carbide appears to be steeper than of measured for the metallic matrix. The corresponding hardness (HIT) and elastic modulus (EIT) values for each of the tested zones were calculated using the Oliver and Pharr method [31] and are summarized in Fig. 7b. As a result of the presence of hard WC particles, the measured hardness in this zone is obviously higher (~ 32 GPa) than the matrix zone which is mainly composed of NiCr (ductile phase). Meanwhile, the Young’s modulus of the carbide (about 525 GPa) was also higher than that of the matrix (about 190 GPa), which may affect the tribological behavior of the studied coatings.
The evolution of friction coefficients (CoF) of the coatings for various parameters is presented in Fig. 8a, b, c, d, and e. It can be seen that roughly all the curves exhibit two stages of friction: (i) the first stage is characterized by initial run-in period with rapid increase followed by a decrease of CoF, and (ii) the second one is the steady-state stage where the CoF slightly increases and stabilizes at a constant value. It is assumed that the increase of CoF during the first stage is strongly related to the surface coating roughness accommodated with the A2O3 ball counterpart. Nevertheless, the formation of the third body promotes the stabilization of the CoF after a running distance that is related to load and sliding velocity [30]. The results show that, whatever the test parameters (distance, applied load, and velocity), the CoF of Coat1 are higher than the Coat2 ones (Fig. 8e), while the CoF increase with rise in sliding velocity and load. In fact, the plastic deformation induced by the Al2O3 counterpart during sliding strengthens the coating’s surface by hardening the ductile NiCr matrix (low hardness and elastic modulus), which allows the increase of CoF in Coat1. In contrast, the large amount of WC hard particles (high hardness and Young’s modulus) act as lubricious oxide tribolayer in Coat1 [32, 33]. This result correlates with the results of A.C. Karaoglanli et al. [11] when comparing the tribological behavior of hard coating with the relative soft ones. With increasing sliding distance, more debris are generated as a result of the plastic deformation of the worn surfaces subjected to a constant load. Simultaneously, important abrasive particle fragmentation occurs with an increase in applied load. On the other side, increasing velocity generates the removal of tribo-oxide film by delamination cracking and more probably fracture of the surface, which results in oxide debris formation that increases the CoF with increasing velocity particularly at higher loads.
SEM micrographs of worn surfaces for both coatings after the extreme wear conditions (15N load, 1500 m sliding distance, and 20 cm/s velocity) are shown in Fig. 9a, b, c, d, and e. The wear track on Coat1 (Fig. 9a) exhibits a smoother aspect compared to that on Coat2 (Fig. 9d) with grooves parallel to the sliding direction. The cutting process responsible for the grooves is related to the presence of hard particles (WC) detached from the WC10Co4Cr and trapped on Coat1 [34], while the low hardness of NiCr matrix compared to Al2O3 counterpart resulted in the plastic deformation of the coating surface (Coat1) for short sliding distance. Nevertheless, after long sliding distance, plastic shear deformation is occurred resulting in adhesive wear mechanism as seen in Fig. 9b and c. These observations suggest the presence of a combined mechanism of adhesive and abrasive wears in the case of Coat1 [35]. On the other hand, the rougher morphology of Coat2 wear track (Fig. 9d) indicates that brittle fracture occurred during sliding with some cracks (Fig. 9e) resulting from the abrasive wear mechanism. This phenomenon is more likely attributed to the decohesion and the pull out of the WC particles due to the formation of W2C hard eutectic phase [36]. With the remarkably high hardness of WC10Co4Cr compared with that of NiCr matrix (see Fig. 7b), more abrasive wear in Coat2 is observed. The EDS analyses carried out on different zones of the worn surface summarized in Table 4 reveal the presence of 5.38 wt.% of Al (spot B with respect to A) in Coat1 detached from the counterpart ball and adhered to the ductile surface of NiCr matrix. The presence of W in the surface of NiCr matrix (point B) and Ni in the surface of WC10Co4Cr particles (spots C and D) suggests that hard debris adheres on ductile surface and vice versa. On the other hand, the significant presence of oxygen (spot G compared to spot H) on the Coat2 surface may be explained by the formation of WO3 [37]. Note that the presence of Al element (spots E and F) on the coatings’ worn surfaces suggests more probably the abrasive wear of the Al2O3 ball counterpart.
3.2 Factorial design of experiments
In order to better understand the effect of the test conditions on the tribological behavior of the studied coatings, load, distance, and velocity are chosen as wear parameters. Several sliding wear tests were conducted with various parameters (Table 5) to estimate their impact on the wear volume of Coat1 and Coat2 based on RSM. The tribological behavior is calculated in terms of the wear volume (mm3) for Coat1 and Coat2 with respect to independent factors (sliding distance, normal load, and sliding velocity considering two parameters level −1 and +1 as low and high values of each parameter (full factorial L8), respectively.
The RSM trials of the randomized design values are shown in Table 5. The optimization is based on the “smaller the best” concept, so that the parameters with low wear volume are considered as optimum. From this concept, it can be seen that the wear volume is obtained in the range from 0.213 to 1.020 mm3 regarding Coat1 and from 0.170 to 0.870 mm3 for Coat2. The low wear volumes of Coat2 are attributed to the higher hardness of the coating due to the presence of WC hard particles that lowers the CoF compared to that of Coat1 as discussed in Sect. 3.1. From Table 6, and based on Student’s t-test of Coat1 that confirms the validity of regression coefficients, it is clear that when t-value is higher than t-critic (t-critic equals 0.15), the regression and the coefficient are statistically significant [38]. Also, for reliability consideration, R2 that equals to 0.99 indicates that the model is in good agreement with the response [39]. By substituting in Eq. (2) the regression coefficient values as shown in Table 6, we get:
All coefficient values have positive sign in the polynomial model; this indicates their positive influences on the wear volume response.
It can be noted from the obtained data that the normal load (X2) is the most important parameter for the overall wear volume process with a high t-ratio equals to 46.11; hence, it can be said that the normal load exerts a strong influence on the wear volume. Subsequently, the sliding velocity is the second more influencing parameter with a t-ratio of 32.11, while sliding distance is found to be the least significant parameter with a t-ratio of 5.57. Interaction between X2 and X3 at a high t-ratio of 13.89 is the most significant combination compared to (X1, X3) and (X1, X2) with a t-ratio of 0.16 and 0.37, respectively. It also appears that the normal load, sliding distance, and sliding velocity have a direct effect on the wear behavior. The same trend was observed for the interaction effects between sliding distance and normal load. This result confirms that the model is highly significant with the p value of 0.0322 less than 0.05 [22] and the F-ratio of 563.7632, cited below in the ANOVA analysis.
By substituting regression coefficients in Eq. (2), as given in Table 7, we get:
From the above expression, the values of the coefficients have a positive sign, indicating their positive influences on wear volume response, except the last constant that has a negative value.
From Table 7, it can be stated that similarly to Coat1, the normal load (X2) is the most important parameter for the overall wear volume process for Coat2 with high t-ratio of 32.00, suggesting that the normal load exerts a strong influence on the wear behavior. Velocity is considered to be the second important parameter followed by sliding distance. Contrary to Coat1, in Coat2, the interaction of X1 and X2 with a high t-ratio of 7.87 is the most significant than all other combinations, while the combination (X2 and X3) is reflected to be the least significant parameter with a t-ratio of −3.46. The wear behavior of Coat1 which contains ductile matrix (NiCr) is greatly influenced by sliding velocity when combined with normal load; this is because of the plastic deformation which makes the sliding of the ball difficult at high velocity. On the other hand, since hard coating (Coat2) does not present ductile deformation, the matter is loosed progressively with the increase of the duration of the test (sliding distance) by abrasive wear.
For Coat2, ANOVA result shows also the existence of linear effects on the normal load, sliding distance, and sliding velocity. The same trend is observed for the interaction effects between sliding distance and normal load, which confirms that the model is also highly significant with both p value of 0.0487 less than 0.05 [22] and F-value of 246.4106 cited in ANOVA analysis below.
The experimental versus predicted values for both coatings are plotted in Fig. 10. It can be seen that the predicted values based on Eq. (2) are in good agreement with their corresponding experimental wear volume values of the input parameters (Fig. 10a). The square of the correlation coefficient values (R2) and the square of the adjusted correlation coefficient values (R2adj) for the model are, respectively, 0.999704 and 0.997931. R2adj value is close to 1.0, which means that the model (Eq. 2) has high reliability for predicting their corresponding experimental data. The general trend of Coat2 is found to be similar to previous published studies, which led to say that Coat2 has a good agreement with their corresponding experimental wear volume value as clearly shown in Fig. 10b.
Figure 11 shows Pareto plot of estimates on the effect of wear test parameters for both coatings. It can be seen clearly that the single parameter with the highest effect on the wear volume is the normal load and then the velocity for the both coatings. However, the interaction between the load and the velocity is found to be in the third place for Coat1, while distance is the one for Coat2. Note that the effect of wear parameters for the coatings could be different depending on the wear mechanism.
3D RSM interpretation curves of the regression equation are given in Fig. 12a, b, c, d, e, and f) to exhibit the relationship between the dependent variable, the experimental levels of each independent variable, and the interaction between two test variables when the third factor is kept at the middle level. For Coat1, the interaction effects between sliding distance-normal load (X1, X2) and sliding distance-velocity (X1, X3) on the wear volume are not significant with the increase of just one parameter for each case. Moreover, the effect of the interaction between normal load and velocity (X2, X3) is the only significant interaction. The plot shows that the wear volume is increased with the increase of normal load and velocity. On the other hand, 3D response of surface plots for Coat2 shows the absence of interaction between sliding distance-sliding velocity and normal load-sliding velocity. Each parameter is impacting individually the variation of wear volume. Hence, the interaction between sliding distance-normal load is only the most significant parameter.
Figure 13 shows the prediction profiler function of the studied parameters. The optimum conditions wherein the best combination of factor settings for achieving the optimum response is found are at the minimum wear conditions (500m, 5N, and 5cm/s) for both coatings, with predicted response of 0.21775 mm3 with a desirability value of 0.962 for Coat1 and 0.164 mm3 with desirability value of 0.904.for Coat2.
4 Conclusions
In this study, the impact of wear test parameters (sliding distance, normal load, and sliding velocity) on the wear volume of NiCr-WC10Co4Cr (Coat1) and WC10Co4Cr (Coat2) HVOF coatings is investigated using microstructural analyses and RSM technique. The main conclusions obtained from this investigation can be summarized as follows:
-
Microstructural properties of coating have a great influence in the wear behavior regarding to the presence of ductile or hard phase. Adhesive wear, with pull-out particle, and plastic deformation were observed on the surface of Coat1 due to the presence of NiCr ductile particles in the coating. On the other hand, abrasive wear mechanism is observed in Coat2 due to high hardness of WC10Co4Cr compared with that of NiCr matrix.
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Both coatings give the same response in terms of RSM when studying the impact of parameters individually, and the normal load is the most significant on wear volume. However, the combined wear test parameters impact on the wear behavior of coating differently with regard to their microstructure. 3D response surface interaction reveals that normal load-sliding velocity interaction is the most influencing in Coat1 while sliding distance-normal load interaction is the one in Coat2.
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Acknowledgements
The authors thank ETS Boudjellal metallizing for the preparation of the HVOF coatings and CRTI team for characterization help (Fabrication and Characterization Workshop).
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The authors confirm that the data supporting the findings of this study are available within the article. The raw data that support the findings of this study are available upon a reasonable request.
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Azzeddine Mazouzi: conceptualization, experimental work, data curation, and writing (original draft preparation). Amine Rezzoug: investigation, experimental work, reviewing, and editing. Billel Cheniti: methodology, reviewing and editing (final draft), review, and editing. Seif El Islam Lebouachera: software and analysis of all the obtained raw data of response surface methodology. Djamel Miroud: supervision and project administration. Aniss-Rabah Boukantar: validation. Nadjib Drouiche: methodology, validation, and involved in the discussion. Boubekeur Djerdjare: project administration.
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Mazouzi, A., Rezzoug, A., Cheniti, B. et al. Impact of wear parameters on NiCr-WC10Co4Cr and WC10Co4Cr HVOF sprayed composite coatings using response surface methodology. Int J Adv Manuf Technol 114, 525–539 (2021). https://doi.org/10.1007/s00170-021-06877-y
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DOI: https://doi.org/10.1007/s00170-021-06877-y