Study on CuZnAl Memory Alloy Fbricated by Selective Laser Melting

doi:10.3901/JME.2019.15.024

Abstract

Abstract: Copper based shape memory alloy was fabricated by selective laser melting successfully. The relative density, phase composition, microstructure and mechanical properties of samples with different energy density were investigated. The results shows that with the increase of energy density, relative density increases first and then decreases. The content of β phase decreases with the increase of the energy density. When energy density reaches 194.4 J/mm³, β phase disappears and there is only a phase left. Microstructure observation shows that there is lamellar α phase in the bulk fabricated by selective laser melting, which different from the short rod like α phase formed in the casting bulk. Tensile strength increases with the increase of energy density because of the decreased porosity. The maximum tensile strength can reach 328.3 MPa. While the microhardness decreases with the increase of energy density due to the change of phase composition.

Key words: Cutting parameters, Low Energy, Minimum Cutting Fluid, Multi-objective optimization, NC Machining, Cu-Zn-Al shape memory alloy, process parameter, selective laser melting

CLC Number:

TG139

ZHUO Linrong, SONG Bo, ZHANG Yuanjie, WANG Min, WEI Qingsong, SHI Yusheng. Study on CuZnAl Memory Alloy Fbricated by Selective Laser Melting[J]. Journal of Mechanical Engineering, 2019, 55(15): 24-30.

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