Reverse shape memory effect in Cu–Mn–Ga–Mo alloys

Zheng, Shiwei; Li, Chengyan; Guo, Lipeng; Chen, Xinren; Huang, Yixiong; Wang, Cuiping; Yang, Shuiyuan

doi:10.1016/j.matchar.2023.112679

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Reverse shape memory effect in Cu–Mn–Ga–Mo alloys

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Chen, Xinren
Computational Sustainable Metallurgy, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Zheng, S., Li, C., Guo, L., Chen, X., Huang, Y., Wang, C., et al. (2023). Reverse shape memory effect in Cu–Mn–Ga–Mo alloys. Materials Characterization, 197: 112679. doi:10.1016/j.matchar.2023.112679.

Cite as: https://hdl.handle.net/21.11116/0000-000C-8924-1

Abstract

In this paper, a remarkable reverse shape memory effect of the Cu-(12–14)Mn-20Ga-0.5Mo shape memory alloys is demonstrated, in which the dimension could move toward the deformed state between 430 K and 550 K. The reverse shape memory effect results from the phase transformation of the residual austenite (L21) → martensite (2H). When raising the temperature from 550 K to 680 K, the shape memory effect appears, and the dimension increases to the state before deformation. Moreover, the reverse shape memory effect is gradually boosted with the enhancement of Mn content, and the Cu-14Mn-20Ga-0.5Mo alloy has the maximum reverse shape memory effect of 1.63%.