Abstract
Knowledge of the mechanical properties of two-component parts is critical for engineering functionally graded components. In this study, mono- and two-component tensile test specimens were metal injection moulded. Three different weld line positions were generated in the two-component specimens. Linear shrinkage of the two-component specimens was greater than that of the mono-component specimens because the incompatibility of sintering shrinkage of both materials causes biaxial stresses and enhances sintering. The mechanical properties of 316L stainless steel were affected by the addition of a coloured pigment used to identify the weld line position after injection moulding. For the two-component specimens, the yield stress and ultimate tensile stress were similar to those of 316L stainless steel. Because 316L and 630 (also known as 17-4PH) stainless steels were well-sintered at the interface, the mechanical properties of the weaker material (316L stainless steel) were dominant. However, the elongations of the two-component specimens were lower than those of the mono-component specimens. An interfacial zone with a microstructure that differed from those of the mono-material specimens was observed; its different microstructure was attributed to the gradual diffusion of nickel and copper.
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D.F. Heaney, P. Suri, and R.M. German, Defect-free sintering of two material powder injection molded components. Part I Experimental investigations, J. Mater. Sci., 38(2003), No. 24, p. 4869.
J.R. Alcock, P.M. Logan, and D.J. Stephenson, Surface engineering by co-injection moulding, Surf. Coat. Technol., 105(1998), No. 1-2, p. 65.
P. Imgrund, A. Rota, F. Petzoldt, and A. Simchi, Manufacturing of multi-functional micro parts by two-component metal injection moulding, Int. J. Adv. Manuf. Technol., 33(2007), No. 1-2, p. 176.
J.L. Johnson, L.K. Tan, R. Bollina, and R.M. German, Evaluation of copper powders for processing heat sinks by metal injection moulding, Powder Metall., 48(2005), No. 2, p. 123.
P. Suri, Chapter 14–Two-material/two-color powder metal injection molding (C2-PIM), [in] Handbook of Metal Injection Moulding, Edited by Donald Heaney, Woodhead Publishing Limited, Oxford, 2012, p. 338.
J.L. Johnson, L.K. Tan, P. Suri, and R.M. German, Design guidelines for processing bi-material components via powder-injection molding, JOM, 55(2003), No. 10, p. 30.
A. Simchi, A. Rota, and P. Imgrund, An investigation on the sintering behavior of 316L and 17-4PH stainless steel powders for graded composites, Mater. Sci. Eng. A, 424(2006), No. 1-2, p. 282.
M. Mulser, G. Veltl, and F. Petzoldt, Development of magnetic/ non-magnetic stainless steel parts produced by two-component metal injection molding, Int. J. Precis. Eng. Manuf., 17 (2016), No. 3, p. 347.
T. Harikou, Y. Itoh, K. Satoh, and H. Miura, Joining of SUS316L and SUS430L by insert injection molding, J. Jpn. Soc. Powder Powder Metall., 49(2002), No. 9, p. 841.
A. Islam, H. Hansen, M. Marhöfer, J. Angel, B. Dormann, and M. Bondo, Two-component micro injection moulding for hearing aid applications, Int. J. Adv. Manuf. Technol., 62(2012), No. 5-8, p. 605.
V. Piotter, N. Holstein, K. Plewa, R.R. Ruprecht, and J. Hausselt, Replication of micro components by different variants of injection molding, Microsyst. Technol., 10(2004), No. 6-7, p. 547.
MPIF standard 35: Materials Standard for Metal Injection Molded Parts, Metal Powder Industries Federation (MPIF), Princeton, NJ, 2016.
MPIF Standard 42: Determination of Density of Compacted or Sintered Metal Powder Products, Metal Powder Industries Federation (MPIF), Princeton, NJ, 2000.
V. Firouzdor, A. Simchi, and A.H. Kokabi, An investigation of the densification and microstructural evolution of M2/316L stepwise graded composite during co-sintering, J. Mater. Sci., 43 (2008), No. 1, p. 55.
V. Firouzdor and A. Simchi, Co-sintering of M2/17-4PH powders for fabrication of functional graded composite layers, J. Compos. Mater., 44 (2010), No. 4, p. 417.
D. Ravi and D.J. Green, Sintering stresses and distortion produced by density differences in bi-layer structures, J. Eur. Ceram. Soc., 26(2006), No. 1-2, p. 17.
P. Suri, D.F. Heaney, and R.M. German, Defect-free sintering of two material powder injection molded components. Part II Model, J. Mater. Sci., 38(2003), No. 24, p. 4875.
P. Imgrund, A. Rota, and A. Simchi, Microinjection moulding of 316L/17–4PH and 316L/Fe powders for fabrication of magnetic-nonmagnetic bimetals, J. Mater. Process. Technol., 200(2008), No. 1-3, p. 259.
Y.M. Li, L.J. Li, and K.A. Khalil, Effect of powder loading on metal injection molding stainless steels, J. Mater. Process. Technol., 183(2007), No. 2-3, p. 432.
Acknowledgements
This study was co-funded by the National Metal and Materials Technology Center (MTEC), Thailand and Taisei Kogyo (Thailand) Co., Ltd. (grant number P1451042). The authors declare that they have no conflict of interest. The authors would also like to thank B. Thumrongthayaluk for sample preparation.
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Manonukul, A., Songkuea, S., Moonchaleanporn, P. et al. Effect of weld line positions on the tensile deformation of two-component metal injection moulding. Int J Miner Metall Mater 24, 1384–1393 (2017). https://doi.org/10.1007/s12613-017-1531-1
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DOI: https://doi.org/10.1007/s12613-017-1531-1