Abstract FeMnSiCrNi shape memory alloy (SMA) undergoes plastic deformation at high temperatures, including 850, 900, 950 and 1000 °C. All the deformed FeMnSiCrNi samples consist of γ austenite and e martensite, where the orientation relationship between γ austenite and e martensite is [ 110 ] γ / / [ 2 1 ¯ 1 ¯ 0 ] e . Furthermore, e martensite increases with increasing deformation temperature. Stacking faults play a predominant role in martensite transformation of FeMnSiCrNi SMA. The mechanisms of martensite transformation are revealed based on slip of Shockley partial dislocation as well as formation of intrinsic and extrinsic stacking faults. The critical transformation stress of FeMnSiCrNi SMA is further put forward based on stacking fault energy. Quenching stress plays an important role in martensitic transformation of FeMnSiCrNi SMA.

中文翻译：

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堆垛层错在 FeMnSiCrNi 形状记忆合金高温塑性变形马氏体转变中的作用

摘要 FeMnSiCrNi 形状记忆合金 (SMA) 在 850、900、950 和 1000 °C 的高温下发生塑性变形。所有变形FeMnSiCrNi样品均由γ奥氏体和e马氏体组成，其中γ奥氏体和e马氏体的取向关系为[110]γ//[21¯1¯0]e。此外，e马氏体随着变形温度的增加而增加。堆垛层错在 FeMnSiCrNi SMA 的马氏体转变中起主要作用。基于肖克利部分位错的滑移以及内在和外在堆垛层错的形成，揭示了马氏体转变的机制。基于层错能进一步提出了FeMnSiCrNi SMA的临界相变应力。淬火应力在 FeMnSiCrNi SMA 的马氏体转变中起重要作用。