贺志荣,叶俊杰,张坤刚,杜雨青.热处理和循环应变对TiNiZr合金形状记忆行为的影响[J].稀有金属材料与工程,2021,50(8):2941~2949.[HE Zhi-rong,YE Jun-jie,ZHANG Kun-gang,DU Yu-qing.Effect of heat treatment and cyclic strain on shape memory behaviors of TiNiZr alloy[J].Rare Metal Materials and Engineering,2021,50(8):2941~2949.]
热处理和循环应变对TiNiZr合金形状记忆行为的影响
投稿时间:2020-09-06  修订日期:2020-10-10
中文关键词:  Ti-Ni-Zr合金  形状记忆合金  热处理  循环应变  形状记忆行为
基金项目:国家重点研发计划项目(2016YFE0111400)
中文摘要:
      利用拉伸实验、光学显微镜和透射电镜研究了退火工艺、时效工艺和循环应变对Ti-50.8Ni-0.1Zr合金形状记忆行为的影响。350~400 ℃和600~700 ℃退火态合金呈超弹性(SE),450~550 ℃退火态合金呈形状记忆效应(SME);300 ℃/(1~50 h)和400 ℃/1 h时效态合金呈SE,400 ℃/(5~50 h)和500 ℃/(1~50 h)时效态合金呈SME。随退火温度升高,合金应力应变曲线平台应力σM先降低后升高,最小值200MPa在500 ℃退火后取得;残余应变εR先升高后降低,最大值2.64%在500 ℃退火后取得。随时效时间延长,300 ℃时效态合金的σM降低,εR始终较小;400 ℃和500 ℃时效态合金的σM降低,εR先升高后趋于稳定。随循环次数增加,呈SE的合金由部分非线性SE转变为完全非线性SE,且σM和能耗△W先降低后趋于稳定;呈SME的合金的σM和△W先降低后趋于稳定。
Effect of heat treatment and cyclic strain on shape memory behaviors of TiNiZr alloy
英文关键词:Ti-Ni-Zr alloy  shape memory alloy  heat treatment  cyclic strain  shape memory behavior
英文摘要:
      The effects of annealing processes, aging processes and cyclic strain on shape memory behaviors of Ti-50.8Ni-0.1Zr alloy were investigated by tensile test, optical microscopy and TEM. The alloys annealed at 350~400 ℃ and 600~700 ℃ present superelasticity (SE), the alloys annealed at 450~550 ℃ present shape memory effect (SME), the alloys aged at 300 ℃ for 1~50 h and at 400 ℃ for 1 h present SE, and the alloys aged at 400 ℃ for 5~50 h and 500 ℃ for 1~50 h present SME. With increasing annealing temperature, the platform stress (σM) of the stress-strain curve in the alloy decreases firstly and then increases, and the minimum 200 MPa obtained in the alloy annealed at 500 ℃; the residual strain (εR) increases firstly and then decreases, and the maximum 2.64% obtained in the alloy annealed at 500 ℃. With increasing aging time, the σM decreases, and the εR is small in the alloy aged at 300 ℃; the σM decreases, and the εR increases firstly and then tends to stable in the alloy aged at 400 ℃ and 500 ℃. With increasing stress-strain cycle number, the superelasticity type alloy transforms from incompletely nonlinear superelasticity to completely nonlinear superelasticity, and the σM and energy dissipation (△W) decrease firstly and then tend to stable; the σM and △W decrease firstly and then tend to stable in shape memory effect type alloy.
作者单位E-mail
贺志荣 陕西理工大学 材料科学与工程学院 hezhirong01@163.com 
叶俊杰 陕西理工大学 材料科学与工程学院  
张坤刚 陕西理工大学 材料科学与工程学院  
杜雨青 陕西理工大学 材料科学与工程学院  
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