Two-way shape memory effect of polycrystalline Ni–Mn–Ga–Gd high-temperature shape memory alloys

descriptionPublicationkeyboard_double_arrow_right Article 01 May 2013 English Publisher:Elsevier BVJournal:Scripta Materialia, volume 68, pages 679-682 (issn: 1359-6462,

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Authors: Jiehe Sui; Xin Zhang; Xiaohang Zheng; Zheyi Yang; Wei Cai; Xiaohua Tian;

doi: 10.1016/j.scriptamat.2013.01.022

Two-way shape memory effect of polycrystalline Ni–Mn–Ga–Gd high-temperature shape memory alloys

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Abstract

The two-way shape memory effect (TWSME) of polycrystalline Ni54Mn25Ga21−xGdx alloys is investigated. The largest TWSME value (2.9%) without training is observed in Ni54Mn25Ga20.7Gd0.3 alloy due to a small amount of Gd(Ni,Mn)4Ga phase formation, and this value increases to 3.5% after thermomechanical training. The TWSME rapidly decreases over the first few thermal cycles, and then slowly reaches a stable value as the number of cycles increases further. Finally, a 2.5% TWSME of as-trained Ni54Mn25Ga20.7Gd0.3 alloy is obtained after 50 thermal cycles.

Related Organizations

Harbin Institute of Technology
China (People's Republic of)

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