形状记忆合金变形机制的速率依赖性

Y. Liu, Yulong Li, K. Ramesh
{"title":"形状记忆合金变形机制的速率依赖性","authors":"Y. Liu, Yulong Li, K. Ramesh","doi":"10.1080/01418610208240046","DOIUrl":null,"url":null,"abstract":"Abstract The rate-dependent tensile deformations of twinned martensitic NiTi shape memory alloy (SMA) are studied for strain rates as high as 300s−1. The results show that the stress plateau associated with the martensite detwinning process still exists under high-strain-rate deformations. The results further suggest that the detwinning process taking place at the initial stage of the tension deformation is not very sensitive to the strain rate at least within the studied range (10−3 -3 × 102 s−1). Beyond the stress-plateau region where dislocation mechanisms are expected to dominate the deformation processes, the stress level increases more strongly with increasing strain rate. The transformation characteristics and shape recovery processes of the dynamically deformed samples provide further evidence that the detwinning process is well developed in the NiTi SMA under dynamic tension deformation.","PeriodicalId":114492,"journal":{"name":"Philosophical Magazine A","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2002-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"42","resultStr":"{\"title\":\"Rate dependence of deformation mechanisms in a shape memory alloy\",\"authors\":\"Y. Liu, Yulong Li, K. Ramesh\",\"doi\":\"10.1080/01418610208240046\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract The rate-dependent tensile deformations of twinned martensitic NiTi shape memory alloy (SMA) are studied for strain rates as high as 300s−1. The results show that the stress plateau associated with the martensite detwinning process still exists under high-strain-rate deformations. The results further suggest that the detwinning process taking place at the initial stage of the tension deformation is not very sensitive to the strain rate at least within the studied range (10−3 -3 × 102 s−1). Beyond the stress-plateau region where dislocation mechanisms are expected to dominate the deformation processes, the stress level increases more strongly with increasing strain rate. The transformation characteristics and shape recovery processes of the dynamically deformed samples provide further evidence that the detwinning process is well developed in the NiTi SMA under dynamic tension deformation.\",\"PeriodicalId\":114492,\"journal\":{\"name\":\"Philosophical Magazine A\",\"volume\":\"32 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"42\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Philosophical Magazine A\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/01418610208240046\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Philosophical Magazine A","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/01418610208240046","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 42

摘要

摘要:研究了应变速率高达300s−1的孪晶马氏体NiTi形状记忆合金(SMA)的速率相关拉伸变形。结果表明,在高应变速率变形下,与马氏体失孪相相关的应力平台仍然存在。结果进一步表明,至少在研究范围(10−3 -3 × 102 s−1)内,发生在拉伸变形初始阶段的脱孪生过程对应变速率不太敏感。在位错机制主导变形过程的应力高原区域之外,应力水平随着应变速率的增加而增加得更强烈。动态变形试样的转变特征和形状恢复过程进一步证明了NiTi SMA在动态拉伸变形下的脱孪生过程发育良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rate dependence of deformation mechanisms in a shape memory alloy
Abstract The rate-dependent tensile deformations of twinned martensitic NiTi shape memory alloy (SMA) are studied for strain rates as high as 300s−1. The results show that the stress plateau associated with the martensite detwinning process still exists under high-strain-rate deformations. The results further suggest that the detwinning process taking place at the initial stage of the tension deformation is not very sensitive to the strain rate at least within the studied range (10−3 -3 × 102 s−1). Beyond the stress-plateau region where dislocation mechanisms are expected to dominate the deformation processes, the stress level increases more strongly with increasing strain rate. The transformation characteristics and shape recovery processes of the dynamically deformed samples provide further evidence that the detwinning process is well developed in the NiTi SMA under dynamic tension deformation.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信