Influence of Initial Textures on Microstructure and Mechanical Properties of Commercially Pure TA2 Titanium Sheet Pre-Strained by Cryorolling

Changhao Wang; Yu Luo; Jinru Luo; Xiao Song; Wei Zhang; Pinghuai Wang; Zhenghao Liu; Maoyin Wang; Xinghui He; Linjiang Chai

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자료유형: 학술저널

저자정보: Changhao Wang (China Academy of Engineering Physics) Yu Luo (China Academy of Engineering Physics) Jinru Luo (China Academy of Engineering Physics) Xiao Song (University of Science and Technology Beijing) Wei Zhang (China Academy of Engineering Physics) Pinghuai Wang (Southwestern Institute of Physics) Zhenghao Liu (China Academy of Engineering Physics) Maoyin Wang (China Academy of Engineering Physics) Xinghui He (China Academy of Engineering Physics) Linjiang Chai (Chongqing University of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.4

발행연도: 2021.1

수록면: 717 - 724 (8page)

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Titanium alloys are one of the most important structural materials for the aerospace applications, which bring active studyon microstructural and mechanical optimization of the alloys. In the present study, commercial TA2 titanium sheets withdifferent initial textures were rolled to a strain of 4% at liquid nitrogen temperature. Microstructures of the rolled sheets werecharacterized using a scanning electron microscope equipped with an EBSD detector and their mechanical properties weretested through quasi-static uniaxial tension tests at room temperature. The influence of the initial texture on the microstructureand mechanical performance of the cryorolled sheet were discussed. Twinning is found to occur in the TA2 sheets after rollingeven at a small strain. Initial texture is an important factor affecting both numbers and types of the twins. {11–22} contractiontwinning is always the dominating type of twins for all three sheets having different initial textures. A lot of {11–22}and {11–24} twins can be found in the sheets with the initial texture of C-axes//ND, while the sheet with an initial texture ofC-axes away from the ND contains few twins, with a high density of dislocations developed instead. Along with contractiontwinning, many {10–12} and {11–21} twins are detected in the sheet with the initial texture of C-axes⊥ND. The cryorolledsheet having the densest twins shows the best mechanical properties, indicating a beneficial effect of a small pre-strain.

#Commercially pure titanium · Cryorolling · Pre-strain · Mechanical properties · Twinning

참고문헌 (24)

참고문헌 신청

Mevlüt Gürbüz / 2021 / Mechanical, Wear and Thermal Behaviors of Graphene Reinforced Titanium Composites / Metals and Materials International 27(4):744~752

J. Dai / 2019 / Misorientation characteristics and textural changes induced by dense twins in high-purity Ti sheet after small strain rolling / Sci. China Technol. Sci 62:1968~1975

Zhongqiang Liu / 2021 / Microstructure, Anisotropic Mechanical Properties and Very High Cycle Fatigue Behavior of Ti6Al4V Produced by Selective Electron Beam Melting / Metals and Materials International 27(8):2550~2561

J. W. Won / 2020 / High strength and ductility of pure titanium via twinstructure control using cryogenic deformation / Scr. Mater 178:94~98

L. Chai / 2015 / Microstructural and textural evolution of commercially pure Zr sheet rolled at room and liquid nitrogen temperatures / Mater. Des 85:296~308

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