含碳Fe-Mn-Si记忆合金的记忆性能研究  

Investigation on Shape Memory Properties of Fe-Mn-Si Alloy with Carbon Addition

作　　者：戴品强[1] 刘声桓[1] 

机构地区：[1]福州大学材料系,福州350002

出　　处：《功能材料》1998年第5期499-451,共1页Journal of Functional Materials

基　　金：福建省自然科学基金

摘　　要：研究了含碳Fe－Mn－Si记忆合金Fe－18．1Mn－5．5Si－0．32C（wt％）的记忆性能，并与典型的Fe－Mn－Si三元记忆合金比较．结果表明：碳原子显著提高Fe－Mn－Si合金的回复率和回复应力，增加可回复应变，使合金的可回复应变大于5％，还极大延缓Fe－Mn－Si记忆合金回复率的表减趋势．碳原子提高Fe－Mn－Si合金记忆性能的原因是碳原子通过固溶强化提高奥氏体的强度，抑制不可逆塑性变形，促进应力诱发γ→ε马氏体相变及其逆转变．同时，含碳Fe－Mn－Si合金中应力诱发马氏体位向较单一，减少了相互交截，有利于形状记忆效应。The shape memory properties of Fe-18. 1Mn-5. 5Si-0. 32C(wt % ) shape memory alloy has been investigated and compared with that of Fe-Mn-Si shape memory alloy. The results show that recovery ratio and recovery stress of the Fe-Mn-Si alloy have been remarkably improved by the addition of carbon. Carbon increases recoverable strain and recovery stress. The recoverable strain of Fe-Mn-Si-C alloy is greater than 5%. Carbon also delays the degradation of shape memory capability. Carbon strengthens the austenite by solution hardening. The strengthening of austenite prevents the permanent slip and favours the stress-induced γ- transformation and its reverse transformation. The orientation of stress-induced martensite in the alloy contained carbon is more uniform than that of Fe-Mn-Si alloy. This is beneficial to the shape memory effects.

关 键 词：形状记忆合金 铁锰硅合金 记忆性能 

分 类 号：TG139.6[一般工业技术—材料科学与工程]