| 引用本文: | 杨世洲,李宁,文玉华,彭华备,刘文博.形变时效对FeMnSiCrNi合金形状回复率和相变温度的影响[J].材料科学与工艺,2012,20(5):66-70.DOI:10.11951/j.issn.1005-0299.20120513. |
| YANG Shi-zhou,LI Ning,WEN Yu-hua,PENG Hua-bei,LIU Wen-bo.Influence of ageing after deformation on shape recovery ration and transformation temperature in FeMnSiCrNi alloy[J].Materials Science and Technology,2012,20(5):66-70.DOI:10.11951/j.issn.1005-0299.20120513. |
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| 摘要: |
| 为了进一步提高Fe-14Mn-6Si-8Cr-5Ni合金的形状记忆效应,对固溶态合金采用了形变时效的方法处理,并利用光学显微分析、X射线衍射分析和透射电子显微分析的测试手段分析了时效温度和时效时间对合金形状回复率和相变温度的影响.结果表明,固溶态合金经10%拉伸和600 ℃时效10 min时,形状回复率提高幅度最大,由固溶态的48%提高到84.7%,并且合金γ→ε马氏体转变的起始温度Ms由固溶态的34 ℃降低到13.2 ℃.合金的形状回复率得到提高的主要原因是合金中热诱发ε马氏体已经消失,组织为奥氏体和大量定向α＇马氏体,这样的组织特征有利于应力诱发γ→ε马氏体相变以及它们的逆相变. |
| 关键词: Fe-Mn-Si-Cr-Ni合金 形变时效 形状回复率 相变温度 时效温度 |
| DOI：10.11951/j.issn.1005-0299.20120513 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(2,9). |
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| Influence of ageing after deformation on shape recovery ration and transformation temperature in FeMnSiCrNi alloy |
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YANG Shi-zhou1,2, LI Ning1, WEN Yu-hua1, PENG Hua-bei1, LIU Wen-bo1
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1.College of Manufacturing Science and Engineering,Sichuan University,Chengdu 610065,China;2.College of Material Science and Engineering,Xihua University,Chengdu 610039,China
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| Abstract: |
| To further enhance shape memory effect (SME) for Fe-14Mn-6Si-8Cr-5Ni alloys,the alloy under solid solution condition was aged after deformation,and the influence of ageing temperature and ageing time on shape recovery ration and transformation temperature in an alloy were investigated by means of optical microscopy,XRD and TEM.The results revealed that the shape recovery ration for an alloy aged at 600 ℃ for 10 min after 10% tensile deformation greatly rose from 48% to the maximum value of 84.7% under solid solution condition and the γ→ε martensite transformation starting temperature Ms dropped from 34 ℃ to 13.2 ℃.The principal reasons that make the remarkable improvement in shape recovery ration are that thermal induced ε martensite in an alloy through above treatments disappears and the constituent phases are austenite and much directional α＇martensite.This structure is just advantageous to stress-induced γ→ε martensite transformation and reverse transformation. |
| Key words: Fe-Mn-Si-Cr-Ni alloy ageing after deformation shape recovery ration transformation temperature ageing temperature |
