【摘要】 本文研究淬火温度对Fe Mn Si Cr Ni记忆合金形状记忆效应的影响 ,并从合金层错能和显微组织两方面讨论了对其产生影响的原因。结果表明 :合金的回复率随着淬火加热温度的升高而升高 ,70 0℃时达到最大值 ,随后又随温度的进一步升高而降低 ;淬火温度越高 ,热诱发ε马氏体数量越多 ,热诱发ε马氏体对形状记忆具有双重作用 ,适量的热诱发ε马氏体有利于提高形状回复率 ;随着淬火温度的升高 ,合金的层错几率有着和回复率相似的变化规律 ;层错几率越大 ,层错能越低 ,合金的回复率也就越高更多还原

【Abstract】 The effect of quenching temperature on the shape memory effect of Fe-Mn-Si-Cr-Ni shape memory alloy has been studied and the involved reasons have been discussed from two respects of stacking fault energy and microstructure in this paper.The results show that with the increment of quenching temperature,the shape recovery ratio increases and reaches to the maximum at 700℃. And then decreases with the further increasing of temperature.The higher quenching temperature,the more thermal induced ε-martensite.The thermal induced ε-martensite has double effect on shape memory:the appropriate amount of heat-induced ε-martensite helps to improve shape recovery ratio.With the increment of quenching temperature,the stacking fault probability of Fe-Mn-Si-Cr-Ni alloy vary similarly as the shape recovery ratio does:with the larger stacking fault probability and the lower stacking fault energy,the higher shape recovery ratio is achieved.更多还原