摘要
NiTi形状记忆合金应用于牙齿正畸弓丝、心血管支架、流体阀门等场景时受应力与化学腐蚀的双重作用,导致合金出现一定程度的氢脆并影响构件的可靠性与安全性。本文围绕NiTi合金中的氢效应问题,综述氢在NiTi合金中的占位、存在状态与扩散行为。总结NiTi合金中氢的含量、状态、分布和扩散系数的表征方法,介绍氢对NiTi合金马氏体相变、阻尼行为的影响,重点讨论NiTi合金的氢脆行为、氢脆影响因素及氢脆机制,并总结用于避免或延迟NiTi合金氢脆发生的措施与方法。最后,提出氢在NiTi合金各相中的扩散行为研究、氢分布的可视化表征以及氢-马氏体相变相互作用等研究方向,以期为NiTi形状记忆合金的研究人员提供有益参考。
NiTi shape memory alloys are commonly subjected to mechanical stress and chemical corrosion challenges when used in orthodontic arch wires, cardiovascular stents, and fluid valve actuators. This exposure leads to hydrogen embrittlement to a certain degree, consequently affecting the reliability and safety of NiTi components. Focusing on the hydrogen effect in NiTi alloys, the location of hydrogen atoms, various states and diffusion behavior were reviewed in this paper. Methods to characterize hydrogen content, states, distributions and diffusivity were also summarized. The effects of hydrogen on the martensitic transformation and damping behavior of NiTi shape memory alloys were also introduced.Furthermore, hydrogen embrittlement behavior, influencing factors and mechanisms in NiTi alloys were discussed in this paper. Strategies to prevent or delay the hydrogen effect on NiTi shape memory alloys were also summarized. Finally, research directions, including diffusion behavior in each phase of NiTi alloys, visual characterization methods of hydrogen distribution, and hydrogen-martensitic transformation interaction were proposed in this paper, aiming to provide valuable insights and reference points for researchers studying NiTi shape memory alloys.
作者
赵厚锐
左舜贵
王盖世
肖飞
ZHAO Hourui;ZUO Shungui;WANG Gaishi;XIAO Fei(AECC Changjiang Power Co.,Ltd.,Yueyang 414100,Hunan,China;School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2024年第5期57-66,共10页
Journal of Materials Engineering
基金
国家自然科学基金-国际(地区)合作与交流项目(52211530096)。
关键词
NITI合金
形状记忆合金
马氏体相变
氢效应
氢脆
NiTi alloy
shape memory alloy
martensitic transformation
hydrogen effect
hydrogen embrittlement
作者简介
通讯作者:左舜贵(1985-),男,讲师,博士,研究方向为形状记忆智能材料与器件,联系地址:上海市松江区龙腾路333号上海工程技术大学材料科学与工程学院(201620),E-mail:shungui@sues.edu.cn。
