Composition optimization of TC21 titanium alloy based on cluster-plus-glue-atom model

ZHU Zhihao; CHEN Zhipeng; SONG Mengfan; LIU Tianyu; ZHANG Shuang; DONG Chuang

doi:10.11868/j.issn.1001-4381.2022.000510

Cailiao gongcheng (May 2024)

Composition optimization of TC21 titanium alloy based on cluster-plus-glue-atom model

ZHU Zhihao,
CHEN Zhipeng,
SONG Mengfan,
LIU Tianyu,
ZHANG Shuang,
DONG Chuang

Affiliations

ZHU Zhihao: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
CHEN Zhipeng: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
SONG Mengfan: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
LIU Tianyu: State Key Laboratory of Light Alloy Casting Technology for High-end Equipment, Shenyang Research Institute of Foundry Co., Ltd., Shenyang 110022, China
ZHANG Shuang: School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China
DONG Chuang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2022.000510
Journal volume & issue: Vol. 52, no. 5
pp. 117 – 126

Abstract

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The composition of high-damage-tolerance dual-phase TC21 (Ti-6Al-2Zr-2Sn-2Mo-2Nb-1.5Cr) were analyzed on the basis of the dual-cluster formula of Ti-6Al-4V, consisting of 13 α-Ti and 4 β-Ti unit. Its β-Ti unit is reduced from 5 to 4 compared with Ti-6Al-4V, while adding more β-stabilizing elements to enhance the strength and plasticity. Subsequently, the atoms of each β-stabilizing element within the β-Ti cluster formula of TC21 were proportioned equally to increase the mixing entropy, and more Zr content was increased to substantially enhance the β-phase stability, giving the cluster formula as α-{[Al-Ti12](AlTi2)}13+β-{[(Al-(Ti12Zr2)]Sn0.75Mo0.75Nb0.75Cr0.75}4(atom fraction), named as TC21Z2, with the corresponding mass fraction of Ti-5.9Al-5.4Zr-2.6Sn-2.1Mo-2.0Nb-1.1Cr. The samples were prepared by using vacuum copper mold pouring process and the as-cast microstructure and tensile mechanical properties of the alloy were studied.Results show that the as-cast microstructure of TC21Z2 is composed of α+α' martensite+ a small amount of β phases, and its ultimate tensile strength, yield strength and elongation are 1289, 1181 MPa and 1.4%, respectively. Its strength and plasticity are better than those of the TC21 at the same state.

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

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