Two-way shape memory effect and thermal cycling stability in Co35Ni35Al30 single crystals by low-temperature martensite ageing
Two-way shape memory effect and thermal cycling stability in Co35Ni35Al30 single crystals by low-temperature martensite ageing
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DOI：
10.1016/j.scriptamat.2018.02.013
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发表时间：
2018-06
影响因子：
6
通讯作者：
E. Panchenko;A. Eftifeeva;Y. Chumlyakov;G. Gerstein;H. Maier
中科院分区：
文献类型：
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作者：
E. Panchenko;A. Eftifeeva;Y. Chumlyakov;G. Gerstein;H. Maier
沿 [110]B2||[100]L10 方向在 400 K、-500 MPa 的压应力下进行低温应力诱发马氏体时效，以改善铁磁 Co35Ni35Al30 单晶的功能性能，该单晶具有 B2-L10 马氏体转变。沿着[001]B2方向，应力诱导马氏体时效晶体表现出双向形状记忆效应，具有高达+7.3(±0.3)%的巨大可逆拉伸应变以及在无应力冷却/加热循环期间的高功能稳定性。此外，在 L10 马氏体的加载/卸载循环中观察到类似橡胶的行为，可逆压缩应变高达 -4.4 (±0.3)%。
Low-temperature stress-induced martensite ageing at 400 K under a compressive stress of −500 MPa was applied along the [110]B2||[100]L10-direction for improving the functional properties of ferromagnetic Co35Ni35Al30single crystals, which feature a B2-L10martensitic transformation. Along the [001]B2-direction the stress-induced martensite aged crystals demonstrated a two-way shape memory effect with a giant reversible tensile strain of up to +7.3 (±0.3) % and a high functional stability during stress-free cooling/heating cycles. In addition, a rubber-like behavior with a reversible compressive strain of up to −4.4 (±0.3) % in loading/unloading cycles in the L10-martensite was observed.