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工程科学与技术:2010,42(2):232-236
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电脉冲处理对固溶态Fe14Mn6Si8Cr5Ni合金形状记忆效应的影响
(1.四川大学 制造科学与工程学院,四川 成都 610065;2.西华大学 材料科学与工程学院,四川 成都 610039;3.四川大学 制造科学与工程学院)
Effect of Electropulsing Treatment on the Shape Memory Effect of Fe14Mn6Si8Cr5Ni Solid Solution Alloy
(1. School of Manufacture Sci. and Eng., Sichuan Univ., Chengdu 610065, China;2. School of Material Sci.and Eng.,Xihua Univ., Chengdu 610039, China;3.School of Manufacture Sci. and Eng., Sichuan Univ.)
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投稿时间:2009-04-20    修订日期:2009-06-25
中文摘要: 为了提高固溶态Fe14Mn6Si8Cr5Ni合金的形状记忆效应,对不同参数的电脉冲对合金显微组织及形状回复率的影响进行研究。结果表明,固溶态Fe14Mn6Si8Cr5Ni合金经300 V、1100 μF,5 Hz电脉冲作用10次,其形状回复率从无电脉冲作用下的44.3%提高到55.9%,提高了26.2%;作用50次,其形状回复率提高到最大值59.6%,提高了34.5%。经金相显微组织分析发现,大能量电脉冲作用可以使合金中热诱发ε马氏体数量减少,奥氏体数量增多,再经5%拉伸后的应力诱发ε马氏体数量更多,更细小。并对电脉冲作用促使固溶态Fe14Mn6Si8Cr5Ni合金形状记忆效应得到提高的机理进行了讨论。
Abstract:In order to improve the shape memory effect of Fe14Mn6Si8Cr5Ni solid solution alloy, the effects of different electropulsing treatment on its microstructure and shape recovery ratio were investigated . The results showed that the shape recovery ratio of the alloy subjected to electropulsing treatment at 300 V, 1100 μf, 5 Hz for 10 times reached 55.9%, 26.2% greater than that without electropulsing treatment. In addition, it was found by metallurgical structure analysis that electropulsing treatment with great energy leaded to the decrease of thermo-induced ε-martensite and increase of austenite, and the amount of stress-induced ε-martensite in alloy following 5% tensile deformation was much more and their size was smaller. The mechanism that electropulsing treatment improved the shape memory effect of Fe14Mn6Si8Cr5Ni solid solution alloy was further discussed.
文章编号:200900360     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(50501015)
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杨世洲,李宁,文玉华.电脉冲处理对固溶态Fe14Mn6Si8Cr5Ni合金形状记忆效应的影响[J].工程科学与技术,2010,42(2):232-236.
Yang Shizhou,Li Ning,Wen Yuhua.Effect of Electropulsing Treatment on the Shape Memory Effect of Fe14Mn6Si8Cr5Ni Solid Solution Alloy[J].Advanced Engineering Sciences,2010,42(2):232-236.