Effect of weld line positions on the tensile deformation of two-component metal injection moulding
来源期刊：International Journal of Minerals Metallurgy and Materials2017年第12期
论文作者：Anchalee Manonukul Sukrit Songkuea Pongporn Moonchaleanporn
文章页码：1384 - 1393
摘 要：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.
Anchalee Manonukul1，Sukrit Songkuea1，Pongporn Moonchaleanporn1
1. National Metal and Materials Technology Center(MTEC),National Science and Technology Development Agency (NSTDA)
摘 要：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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