Texture evolution during thermomechanical treatments in Fe–Mn–Si shape memory alloys
Texture evolution during thermomechanical treatments in Fe–Mn–Si shape memory alloys
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DOI：
10.1016/j.msea.2006.10.214
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发表时间：
2008-05
期刊：
影响因子：
6.4
通讯作者：
A. Druker;C. Sobrero;H. Brokmeier;J. Malarría;R. Bolmaro
中科院分区：
文献类型：
--
作者：
A. Druker;C. Sobrero;H. Brokmeier;J. Malarría;R. Bolmaro
研究了Fe-30 Mn-4Si（at.%）合金的织构演变和形状记忆行为。合金表现出γ参与马氏体相变。对合金进行不同的轧制和退火处理。在每种情况下进行纹理映射和形状记忆效应。在1000°C下热轧后，对于高累积应变值，观察到奥氏体相的典型面心立方（FCC）剪切织构。在600°C下进一步乳制导致一些织构降低，尽管织构图案保持不变。或者，冷轧导致应力诱导的马氏体，并且在650°C退火后，观察到类似的FCC轧制织构。因此，不同的热机械过程允许开发完全不同的纹理图案，可以利用获得新的形状记忆响应。通过对不同试样的形状恢复和屈服应力的测量，分析了织构和工艺参数对形状记忆效应的影响。
Texture evolution and shape memory behaviour were investigated in an Fe–30Mn–4Si (at.%) alloy showing the γ↔ɛ martensitic transformation. The alloy was subjected to different rolling and annealing treatments. Texture mapping and shape memory effect were performed in each case. After hot-rolling at 1000°C, and for high values of accumulated strain, typical face-centered cubic (FCC) shear textures were observed for the austenitic phase. Further rolling at 600°C leads to some texture reduction although the texture pattern remains unchanged. Alternatively, cold-rolling leads to stress-induced ɛ martensite and, after annealing at 650°C, a similar FCC rolling texture was observed. Thus, different thermomechanical processes allow the development of quite different texture patterns that might be exploited for attaining novel shape memory responses. Shape recovery and yield stress were measured for the different specimens to analyze the role of texture and processing parameters on the shape memory effect.