明效Fe-Mn-Si-Co-Mo合金中应力诱发马氏体的逆相变与形状记忆效应  

Stress induced martensites reverse transformation behavior and shape memory effect in An aged Fe-Mn-Si-Co-Mo alloy

作　　者：王中[1] 蔡伟[1] 赵连城[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《材料科学与工艺》1999年第3期53-57,共5页Materials Science and Technology

摘　　要：研究了时效对ＦｅＭｎＳｉＣｏＭｏ 合金的临界屈服应力、应力诱发马氏体逆转变以及形状记忆效应的影响． 结果表明，随着时效温度的升高，室温下的母相屈服应力与应力诱发马氏体相变临界应力之差增大，应力诱发马氏体逆转变温度Ａｓ 和Ａｆ 升高，而形状记忆效应在６００ ℃时效时出现峰值． 电镜组织观察表明，时效温度高于６００ ℃时，应力诱发马氏体中全位错密度增大，使应力诱发马氏体稳定性提高．The effect of aging on yield stress, stress induced martensites reverse transformation behavior and shape memory effect in an Fe Mn Si Co Mo alloy has been studied. It is shown that with the increase of aging temperature, the difference of critical stress for parent phase slip deformation and that for martensitic transformation was increased, but the martensites reverse transformation temperature was increased, but the martensites reverse transformation temperatures were raised, and a peak value of shape recovery ratio was observed at 600 ℃. TEM observation revealed that when the aging temperature beyond 600 ℃, the dislocation density in martensites increased with increasing aging temperature, therefore the martensites stability was raised.

关 键 词：合金 形状记忆效应 时效 铁锰硅钴钼 

分 类 号：TG139.6[一般工业技术—材料科学与工程]