摘要
亚稳β钛合金的力学性能与其变形机制密切相关。在稳定性很高的β基体中位错滑移是唯一的变形机制,而随着β基体稳定性的降低,除位错滑移之外的其他变形机制如{112}<111>变形孪晶、应力诱发β→ω相变、{332}<113>变形孪晶以及应力诱发β→α″相变等变形机制会逐渐产生。这些变形机制可以导致孪晶/相变诱导塑性的效应,能显著提高相应合金的加工硬化率和塑性。近年来关于这些变形机制的研究取得了重要进展,不同变形机制之间尤其是变形孪晶与应力诱发相变之间的内在联系被揭示出来,为现有合金的性能优化和新型合金的设计开发提供了重要的理论指导。本文综述了这些研究进展,并对其中存在的一些不足进行了分析。
The deformation behavior of metastableβtitanium alloys is dependent on their deformation mechanisms.In fully stableβtitanium alloys,dislocation slip is the only deformation mechanism,while additional deformation mechanisms such as{112}?111?twinning,stress-inducedβ→ωtransformation,{332}?113?twinning and stress-inducedβ→α″transformation occur with the decrease ofβphase stability.In recent years great progress has been made in the study of these deformation mechanisms.The relationship between different deformation mechanisms,especially that between deformation twinning and stress-induced phase transformation,was revealed.In the present paper,the relative studies were reviewed and our perspective on the direction of future research efforts was provided.
作者
赖敏杰
李金山
LAI Min-jie;LI Jin-shan(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2019年第9期2185-2191,共7页
The Chinese Journal of Nonferrous Metals
基金
国家凝固技术国家重点实验室(西北工业大学)自主研究课题资助项目(2019-QZ-05)~~
关键词
亚稳Β钛合金
变形孪晶
应力诱发相变
微观组织
力学性能
metastable β titanium alloy
deformation twinning
stress-induced phase transformation
microstructure
mechanical property
