Quick Search:       Advanced Search
杨秋月,谭元标,尹存宏,刘文昌,向嵩,赵飞.51.1Zr-40.2Ti-4.5Al-4.2V合金拉伸变形过程中的组织演变和力学性能研究[J].稀有金属材料与工程(英文),2021,50(1):320~332.[Yang Qiuyue,Tan Yuanbiao,Yin Cunhong,Liu Wenchang,Xiang Song and Zhao Fei.A study on microstructure evolution and mechanical properties of 51.1Zr-40.2Ti-4.5Al-4.2V during tensile deformation[J].Rare Metal Materials and Engineering,2021,50(1):320~332.]
A study on microstructure evolution and mechanical properties of 51.1Zr-40.2Ti-4.5Al-4.2V during tensile deformation
Download Pdf  View/Add Comment  Download reader
Received:February 10, 2020  
DOI:
Key words: ZrTiAlV alloy  Deformation  Phase transformation  Work hardening rate.
Foundation item:国家自然科学基金资助(51804087);贵州省联合基金([2017]5788、[2017]7240);贵州省科技计划项目(黔科合平台人才[2018]5781);贵州省基础研究计划项目(黔科合基础[2019]1091);贵州大学现代制造技术教育部重点实验室开放基金(XDKFJJ[2018]01)
Author NameAffiliation
Yang Qiuyue,Tan Yuanbiao,Yin Cunhong,Liu Wenchang,Xiang Song and Zhao Fei  
Hits: 71
Download times: 147
Abstract:
      The microstructure evolution and mechanical properties of 51.1Zr-40.2Ti-4.5Al-4.2V alloy during tensile deformation at room temperature were studied. The results show that the phase transformation from β to α" phase were observed in the process of tensile deformation at room temperature, and the volume fraction of the α" phase decreases with the increase of the tensile rate. The existence of the α" phase has an obvious effect on the mechanical properties of the alloy. At the tensile rate of 0.3 mm/min, the trigger stress (TS), ultimate tensile strength (UTS), elongation (EL) and elastic modulus (EM) were 770.06 MPa, 1168.60 MPa, 14.96% and 64 GPa, respectively. TS and EM increased with the increase of tensile rate, while UTS and EL decreased. Three different stages were presented in the curve of work hardening rate. Especially, the second stage was obviously affected by the α" phase. At a given strain, the work hardening rate at the second stage is gradually decreased with increasing tensile rate. When the tensile rate was 0.3 mm/min, the fracture morphology of the alloy was composed of a large number of dimples and a small number of quasi-cleavage planes, which show a typical feature of plastic fracture. With the increase of the tensile rate, the fracture mode of the alloy changed from plastic fracture to brittle fracture. This is mainly due to that the volume fraction of the α" phase decreases with the increase of the tensile rate.