Abstract
The macrosegregation behaviors of Al-Sn-Cu ternary immiscible alloy castings and their effects on mechanical and tribological properties were investigated. The results demonstrate that Sn and Cu segregate in the casting simultaneously, and the mass fraction of the two elements has a “U” shaped distribution. Significantly, positive and negative segregation occur in the casting, with positive segregation appearing on the top and lower surfaces and negative segregation on the remaining surfaces, with the 1/2 surface (hot node location) having the highest degree of negative segregation. Furthermore, the results of Vickers hardness, tensile strength, and elongation show that Sn and Cu cooperatively affect the mechanical properties of castings. The higher the mass fraction of Sn and Cu elements, the higher the hardness, the greater the tensile strength, and the better the elongation. The findings of the step-by-step loading tests demonstrate that the segregation of Sn and Cu significantly impacts the tribological characteristics of the castings. The higher the mass fraction of Sn and Cu on the sample surface, the better the tribological characteristics.
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Kong C J, Brown P D, Harris S J, et al. Analysis of microstructure formation in gas-atomised Al-12wt.% Sn-1wt.% Cu alloy powder. Mater. Sci. Eng. A, 2007, 454: 252–259.
Belov N A, Akopyan T K, Gershman I S, et al. Effect of Si and Cu additions on the phase composition, microstructure and properties of Al-Sn alloys. J. Alloys Compd., 2017, 695: 2730–2739.
Rusin N M, Skorentsev A L, Gurskikh A V. Effect of copper additives on mechanical and tribotechnical properties of sintered composites Al-Sn. Key. Eng. Mater., 2016, 685: 295–299.
Felipe B, Emmanuelle S F, Noé C, et al. Microstructure, tensile properties and wear resistance correlations on directionally solidified Al-Sn-(Cu; Si) alloys. J. Alloys Compd., 2017, 695: 3621–3631.
Pathak J P, Mohan S. Tribological behaviour of conventional Al-Sn and equivalent Al-Pb alloys under lubrication. Mater Sci., 2003, 26: 315–320.
Yan N, Hong Z Y, Geng D L, et al. Phase separation and structure evolution of ternary Al-Cu-Sn immiscible alloy under ultrasonic levitation condition. J. Alloys Compd., 2012, 544: 6–12.
Pramanick A, Chaterjee S, Bhattacharya V, et al. Synthesis and microstructure of laser surface alloyed Al-Sn-Si layer on commercial aluminum substrate. J. Mater. Res., 2005, 20(6): 1580–1589.
Perrone A, Zocco A, Rosa H D, et al. Al-Sn thin films deposited by pulsed laser ablation. Sci. Eng. C, 2002, 22(2): 465–468.
Ueda M, Inaba R, Ohtsuka T. Composition and structure of Al-Sn alloys formed by constant potential electrolysis in an Al Cl3-NaCl-KCl-Sn-Cl2 molten salt. Electrochim. Acta, 2013, 100: 281–284.
Noskva N I, Vil’danova N F, Filippov Y I, et al. Preparation, deformation, and failure of functional Al-Sn and Al-Sn-Pb nanocrystalline alloys. Met. Metallogr., 2006, 102(6): 646–651.
Patel J, Morsi K. Effect of mechanical alloying on the microstructure and properties of Al-Sn-Mg alloy. J. Alloys Compd., 2012, 540: 100–106.
Kong C J, Brown P D, Harris S J, et al. The microstructures of a thermally sprayed and heat treated Al-20wt.% Sn-3wt.%Si alloy. Mater. Sci. Eng. A, 2005, 403(1–2): 205–214.
Wu X F, Zhang G A, Wu F F. Influence of Bi addition on microstructure and dry sliding wear behaviors of cast AlMg2Si metal matrix composite. T. Nonferr. Metal. Soc., 2013, 23(6): 1532–1542.
Kotadia H R, Doernberg E, Patel J B, et al. Solidification of Al-Sn-Cu based immiscible alloys under intense shearing. Metall. Mater. Trans. A, 2009, 40: 2202–2211.
Guo H M, Yang X J, Hu B. Low superheat pouring with a shear field in rheocasting of aluminum alloys. J. Wuhan Univ. Technol. Mater. Sci., 2008, 23(1): 54–59.
Li X M, Wang Y, Bi Q C, et al. Experimental study on gas bubble rising velocity in different liquids. J. Xi’an Jiaotong Univ., 2003, 37(9): 971–974.
Liu W, Xing S M, Bao P W. Energy dissipation and apparent viscosity of semisolid metal during rheological processes part II: Apparent viscosity. J. Mater. Sci. Technol., 2007, 23(6): 801–805.
Liu W, Xing S M, Bao P W. Energy dissipation and apparent viscosity of semisolid metal during rheological processes Part I: Energy dissipation. J. Mater. Sci. Technol., 2007, 23(3): 342–346.
Zhong Y, Yan D S, Su G Y, et al. Microsegregation and improving method of a squeeze cast LY12 alloy. Acta Metall. Sin-Engl., 2001, 37(1): 42–46.
Chen F Y, Jie W Q. Study of microsrgregation in Al-Cu-Zn ternary alloys by experiment and scheil model. Acta Metall. Sin-Engl., 2004, 40(6): 664–668.
Zhu C, Zhao Z H, Zhu Q F, et al. Structures and macrosegregation of a 2024 aluminum alloy fabricated by direct chill casting with double cooling field. China Foundry, 2022, 20(1): 1–8.
Wan Q J, Yao H Z. Formation of hot-top segregation in steel ingot and effect of steel compositions. Metall. Mater. Trans. B, 1989, 5(20): 723–730.
Ghomashchi M R, Vikhrov A. Squeeze casting: An overview. J. Mater. Process. Technol., 2000, 101(1–3): 1–9.
Sun J B, Wang X D, Wang S Q, et al. Heat treatment technology of 2A14 alloy extruded bar. T. Nonferr Metal Soc., 2014, 24(10): 2452–2459.
Sun Y G, Xu Y M. Experimental research on limit [PV] Value of friction pair of hydraulic pump. Hydraulics Pneumatics & Seals, 1994, 3: 9–10. (In Chinese)
Tan Y H. Research on power system of heavy launch vehicle in China. Journal of Rocket Propulsion, 2011, 37(1): 1–6. (In Chinese)
Yuan G H, Li Z J, Lou Y X, et al. Friction and wear characteristics of several Al-Sn-Si-Cu alloys. Tribology, 1998, 18: 151–155. (In Chinese)
Gao Y, Zeng J M, Si J Y, et al. Study on wear-friction bearing properties alloys of Al-Sn. Foundry, 2005, 54(6): 591–594. (In Chinese)
Acknowledgements
This research was financially supported by the National Natural Science Foundation of China (No. 51575151 and No. 52005005) and the Science and Technology Project of Anhui Province, China (No. 1501021006).
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Yan-guo Yin Male, Professor. Research interests: Lead-free environment-friendly selflubricating materials, aviation lightweight materials, hydraulic key friction pair parts.
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Xu, M., Yin, Yg., Li, Cm. et al. Effects of macrosegregation on mechanical and tribological properties of squeeze casting immiscible bearing alloys. China Foundry 20, 443–451 (2023). https://doi.org/10.1007/s41230-023-2095-5
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DOI: https://doi.org/10.1007/s41230-023-2095-5