论文部分内容阅读
采用电阻和内耗分析测定了不同Ｍｎ含量Ｆｅ－Ｍｎ－Ｓｉ基形状记忆合金（ＳＭＡ）相变临界点Ｍｓ、Ｍｆ、Ａｓ、Ａｆ和ＴＮ，研究了母相反铁磁状态时γε马氏体相变热诱发和应力诱发的影响．发现，随着Ｍｎ含量的增加，Ｍｓ、Ｍｆ、Ａｓ、Ａｆ降低，而ＴＮ升高直至热马氏体完全被抑制．当ＴＮ接近Ｍｓ时，母相反铁磁状态并不能完全抑制马氏体相变，而是使相变温区延伸到ＴＮ以下达－１５０°Ｃ的低温．即使热马氏体完全被抑制后应力仍然可以大量诱发马氏体相变，显示形状记忆效应（ＳＭＥ）．这时应力诱发马氏体（ＳＩＭ）的相对数量可由逆相变内耗峰的面积来评定．
The critical points Ms, Mf, As, Af and TN of Fe-Mn-Si based shape memory alloy (SMA) with different Mn content were measured by resistance and internal friction analysis. The martensite Effect of phase-induced thermal and stress-induced changes. It was found that Ms, Mf, As, Af decreased with increasing Mn content, while TN increased until the hot martensite was completely inhibited. When TN approaches Ms, the antiferromagnetic state of the mother does not completely suppress the martensitic transformation, but extends the phase transition temperature to a low temperature of -150 ° C below TN. Even though hot martensite is completely suppressed, the stress can still induce a large amount of martensitic transformation, showing a shape memory effect (SME). The relative amount of stress-induced martensite (SIM) at this time can be assessed by the area of the internal peak of the reverse phase transition.