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用X射线衍射分析、显微组织观察等研究了Fe -17Mn - 10Cr - 5Si- 4Ni合金在低温 (低于室温 )下应力诱发相变的特点及其形状记忆效应。合金在室温拉伸变形时 ,当应变量超过 5%由于应力诱发ε马氏体的相变作用而形成α′马氏体 ;当变形温度低于室温时应力优先诱发γ→α′马氏体转变。正是这种应力诱发相变特征的转变使合金的形状记忆效应在室温以下出现奇特低谷。
The characteristics of stress-induced phase transition and the shape memory effect of Fe-17Mn - 10Cr - 5Si - 4Ni alloy at low temperature (below room temperature) were studied by X - ray diffraction analysis and microstructure observation. At room temperature tensile deformation of the alloy, α ’martensite is formed when the strain exceeds 5% due to the stress-induced transformation of ε-martensite. When the deformation temperature is lower than room temperature, the stress is preferentially induced. Γ → α’ martensite change. It is this shift in stress-induced phase transformation that causes the shape memory effect of the alloy to appear peculiarly low below room temperature.