| 引用本文: | 乔志霞,董玉涛,刘永长,张海军,孟摇毅.热-机械循环处理对FeMnSiCrNi 合金
记忆效应的影响[J].材料科学与工艺,2012,20(1):22-25,30.DOI:10.11951/j.issn.1005-0299.20120105. |
| QIAO Zhi-xia,DONG Yu-tao,LIU Yong-chang,ZHANG Hai-jun,MENG Yi.Effect of thermal-mechanical cycling treatment on the shape memory effect in an FeMnSiCrNi alloy[J].Materials Science and Technology,2012,20(1):22-25,30.DOI:10.11951/j.issn.1005-0299.20120105. |
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| 热-机械循环处理对FeMnSiCrNi 合金
记忆效应的影响 |
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乔志霞1, 董玉涛2,3, 刘永长3, 张海军4, 孟摇毅4
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1.天津商业大学机械工程系,天津300134,E-mail:qzhxia@tjcu.edu.Cn;2.北德认证(天津)有限公司,天津300051;3.天津大学材料科学与工程学院,天津300072;4.天津商业大学机械工程系,天津300134,E-mail:qzhxia@tjcu.edu.cn
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| 摘要: |
| 采用电子拉伸试验机考察了不同预变形量热-机械循环处理对FeMnSiCrNi合金形状记忆效应的影响，并利用光学及透射电子显微分析方法研究了经热-机械循环处理后母相γ及应力诱发ε马氏体的组织变化.结果表明：在预变形量为4%、5%、和6%的情况下，经2次循环训练后具有最高的应变恢复率；适当的热-机械循环处理能促进母相γ中形成大量按一定取向分布的晶体缺陷，为择优取向ε马氏体的成长打开通道，显著降低ε马氏体的几何尺寸，提高其逆相变的晶体学可逆性；若热-机械循环次数过多，母相γ中会形成位错缠结，阻碍γ→ε相变过程中层错扩展，从而不利于形状记忆效应. |
| 关键词: FeMnSi记忆合金 热-机械循环处理 TEM ε马氏体 |
| DOI：10.11951/j.issn.1005-0299.20120105 |
| 分类号:TG139.6 |
| 基金项目:国家自然科学基金钢铁联合基金资助项目(50834011)；中国-塞尔维亚政府间科技合作项目（1-12）；天津商业大学青年培育基金资助项目(080105) |
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| Effect of thermal-mechanical cycling treatment on the shape memory effect in an FeMnSiCrNi alloy |
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QIAO Zhi-xia,DONG Yu-tao,LIU Yong-chang,ZHANG Hai-jun,MENG Yi
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1.School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China，E-mail:qzhxia@tjcu.edu.cn;2.TUV NORD Certification (Tianjin) Co.,Ltd.,Tianjin
300051,China;3.School of Materials Science & Engineering,Tianjin University,Tianjin 300072,China
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| Abstract: |
| Abstract:The influence of thermal-mechanical cycling treatment on the shape memory effect in FeMnSiCrNi alloy was investigated using an electronic tensile tester,and the
microstructural variation of parent phase γ and the stress induced ε martensite after thermal-mechanical cycling treatment were investigated by optical and
transmission electronic microscopy.The results show that with pre-strain of 4%,5% and 6%,the FeMnSiCrNi samples exhibit the maximum recovery ratio when subjected two treatment
cycles.A lot of crystal defects orientated on some directions are introduced to the parent phase γ through thermal-mechanical cycle treatment,which is helpful for the
growth of stress induced ε martensite of preferential orientations.At the same time,the thermal-mechanical cycle treatment results in the significant decrease of the
average size of stress induced ε martensite,which can improve the crystallographic reversibility of ε martensite during the reverse transformation
process.However,excessive treatment cycles may lead to tangled dislocations,which can hinder the extension of fault defects during stress induced γ→ε transformation,and
thus decrease the shape memory effect in the FeMnSiCrNi alloy. |
| Key words: FeMnSi shape memory alloy thermal-mechanical cycle treatment TEM ε martensite |
