Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Hao-Yu Zhang; Zhi-Peng Zhang; Zheng-Yuan Li; Jie Sun; Xin Che; Si-Qian Zhang; Yu Liang; Li-Jia Chen

doi:10.1088/2053-1591/ab756a

Materials Research Express (Jan 2020)

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Hao-Yu Zhang,
Zhi-Peng Zhang,
Zheng-Yuan Li,
Jie Sun,
Xin Che,
Si-Qian Zhang,
Yu Liang,
Li-Jia Chen

Affiliations

Hao-Yu Zhang: ORCiD; School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Zhi-Peng Zhang: School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Zheng-Yuan Li: ORCiD; School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Jie Sun: State Key Laboratory of Rolling and Automation, Northeastern University , Shenyang 110819, People’s Republic of China
Xin Che: ORCiD; School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Si-Qian Zhang: School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Yu Liang: School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China
Li-Jia Chen: School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ab756a
Journal volume & issue: Vol. 7, no. 2
p. 026555

Abstract

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Low-cycle fatigue (LCF) behavior of a novel near β titanium alloy Ti-6Mo-5V-3Al-2Fe (wt%) with various types of secondary α phase was investigated. Results indicate that No.1 microstructure containing crossed and fine intragranular α , as well as discontinuous GB α , is obtained through low temperature (480 °C) aging treatment. No.2 microstructure containing parallel and coarse intragranular α , as well as parallel WGB α , forms after high temperature (600 °C) aging treatment. Under all strain amplitudes, stress amplitudes and LCF life of the samples with No.1 microstructure are higher than those of the samples with No.2 microstructure. For the samples with No.1 microstructure, more and deeper secondary cracks and dimples form in fatigue crack propagation and fast fracture regions, respectively. Such fatigue fracture behavior reflects a longer LCF life.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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