Effects of ageing on low-cycle fatigue (LCF) properties of AZ80 magnesium alloy wheel hub

Jun Wang; Fulai Yang; Jin Ma; Tingyan zhang; Hui Cao; Xin Che; Liye Geng; Zhimin Zhang; Qiang Wang; Yongbiao Yang

doi:10.1088/2053-1591/abb0ae

Materials Research Express (Jan 2020)

Effects of ageing on low-cycle fatigue (LCF) properties of AZ80 magnesium alloy wheel hub

Jun Wang,
Fulai Yang,
Jin Ma,
Tingyan zhang,
Hui Cao,
Xin Che,
Liye Geng,
Zhimin Zhang,
Qiang Wang,
Yongbiao Yang

Affiliations

Jun Wang: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China; Technology Center, ShanXi Taigang Stainless Steel Co., Ltd, Taiyuan 030003, People’s Republic of China; State Key Laboratory of Advanced Stainless Steel Materials, Taiyuan Iron and steel (Group) Co., Ltd., Taiyuan 030003, People’s Republic of China
Fulai Yang: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Jin Ma: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Tingyan zhang: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Hui Cao: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Xin Che: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Liye Geng: Shanxi Diesel Engine Industries Co., Ltd, Datong 037036, People’s Republic of China
Zhimin Zhang: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Qiang Wang: College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China
Yongbiao Yang: ORCiD; College of Materials Science and Engineering, North University of China , Taiyuan 030051, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/abb0ae
Journal volume & issue: Vol. 7, no. 9
p. 096508

Abstract

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A hollow billet Expanding-Reducing Extrusion (ERE) wheel hub forming process was carried out with AZ80 magnesium alloy. The effects of ageing on Low-cycle fatigue (LCF) properties were investigated, and the microstructure was characterized with scanning electronic microscopy (SEM). The LCF testing results exhibited that the stress amplitude increased with increasing ageing time, while the plastic strain decreased with increasing ageing time. Cyclic softening followed by hardening was observed for 0 h and 16 h aged samples; however, there was no obvious cyclic softening or hardening for 36 h aged sample. The tension-compression asymmetry were not obvious due to the low strain, precipitation and the non typical basal texture. Fracture observations indicated that the fatigue cracks were initiated on the surface, and the crack propagation area decreased with increasing ageing time. Thus, it can be concluded that ageing has strong effects on the fatigue life for the studied magnesium alloy.

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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