Synergetic enhancement of ultimate strength and damping properties by pore structure in novel porous Cu-Al-Mn shape memory alloy

Li, Xide; Liu, Jili; Wang, Haidong; Dawei, Qiu; Zhang, Lei; Yang, Junsheng; Liu, Yuzuo

doi:10.1016/j.jmatprotec.2024.118422

Journal of Materials Processing Technology

2024

DOI: 10.1016/j.jmatprotec.2024.118422

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Synergetic enhancement of ultimate strength and damping properties by pore structure in novel porous Cu-Al-Mn shape memory alloy

Xide Li,

Jili Liu,

Haidong Wang

et al.

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Superelasticity with excellent temperature stability in Cu-Al-Mn shape memory alloy by gradient high temperature rolling

Liu,

Zhang,

Lin

et al. 2024

Materials Science and Technology

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The objective was to enhance the temperature stability of Cu-Al-Mn shape memory alloys (SMAs) across a wide temperature range. To this end, a gradient rolling treatment at 800 °C (HR) and subsequent heat treatment (HT) were employed to create a gradient texture. The objective was to control and reduce the temperature dependence of superelasticity properties, including superelastic stress ( σM), austenite transformation stress ( σA), damping coefficient ( tanΦ), and so forth, in columnar-grained Cu-Al-Mn SMAs. The results demonstrated that the temperature dependence rate of stress-induced martensitic transformation stress ( σM) initially increased and then decreased with the reduction in gradient range in the RD direction. The dσM/dT value for HRT-65/68 was 0.369 MPa/K. In the TD direction, the dσM/dT of HRT-60V was only 0.232 MPa/K over a wide range of temperatures, approximately 120 K. The excellent superelastic temperature stability observed in this gradient structure Cu-Al-Mn SMA was superior to that of other reported Cu-Al-Mn SMAs and NiTi SMAs. Following gradient rolling treatment, the alloy retained a strong <001>-oriented texture along the RD direction. However, the strength of this texture was reduced, resulting in the formation of non-high phase transition strain orientation and grains with a gradient size distribution. These characteristics contributed to the development of high superelasticity with excellent temperature stability.

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Superelasticity with excellent temperature stability in Cu-Al-Mn shape memory alloy by gradient high temperature rolling

Liu,

Zhang,

Lin

et al. 2024

Materials Science and Technology

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show abstract

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Synergetic enhancement of ultimate strength and damping properties by pore structure in novel porous Cu-Al-Mn shape memory alloy

Cited by 1 publication

References 52 publications

Superelasticity with excellent temperature stability in Cu-Al-Mn shape memory alloy by gradient high temperature rolling

Superelasticity with excellent temperature stability in Cu-Al-Mn shape memory alloy by gradient high temperature rolling

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