Quick Search:       Advanced Search
张金勇,李金山,陈正,孟庆坤,张平,Sun Fan,沈承金,沈宝龙.一种具有TRIP/TWIP效应的高强高塑性亚稳β钛合金设计及发展[J].稀有金属材料与工程(英文),2018,47(9):2787~2792.[Zhang Jinyong.,Li Jinshan,Chen Zheng,Meng Qingkun,Zhang Ping,Sun Fan,Shen ChengJin and Shen Baolong.The development of new beta titanium alloys combined high strength, large ductility and improved strain-hardening behavior due to TRIP/TWIP effects[J].Rare Metal Materials and Engineering,2018,47(9):2787~2792.]
The development of new beta titanium alloys combined high strength, large ductility and improved strain-hardening behavior due to TRIP/TWIP effects
Download Pdf  View/Add Comment  Download reader
Received:November 16, 2016  Revised:March 14, 2017
DOI:
Key words: Beta Ti-alloys  TRIP/TWIP effects  Mechanical behavior  Deformation mechanism
Foundation item:国家自然科学基金资助(项目号51601216), 西北工业大学凝固技术国家重点实验室开放课题资助(项目号SKLSP201501)和中国矿业大学学科前沿科学研究专项(项目号2015XKQY01)
Author NameAffiliation
Zhang Jinyong.,Li Jinshan,Chen Zheng,Meng Qingkun,Zhang Ping,Sun Fan,Shen ChengJin and Shen Baolong  
Hits: 13
Download times: 1
Abstract:
      Titanium and its alloys have been extensively used in numerous application fields. However, both their low ductility and their lack of work-hardening when compared with steels or Co-Cr alloys, limit their use in advanced applications where superior combinations of strength and ductility are required. Therefore, inspired from the superior mechanical properties of TRIP/TWIP steels (TRIP for Transformation Induced Plasticity and TWIP for Twinning Induced Plasticity), we proposed a new type of metastable β Ti-alloys showing combined TRIP/TWIP effects through controlling the β stability of Ti-alloys. The alloys were designed based on the “d-electron alloy design method” and controlling of electron/atom ratio (e/a). The results show that so-designed alloys display excellent combination of high strength (ultimate tensile strength ≈1020MPa), high ductility (uniform elongation 43%) and improved work-hardening behavior. The detailed microstructural analysis indicates that the superior performances arise from the synergic effects between α? phase transformation induced plasticity (TRIP) and {332}<113> twinning induced plasticity (TWIP).