Effect of bimodal grain size and gradient structure on heterogeneous deformation induced (HDI) stress and mechanical properties of Cu

Yi Yang; Yulan Gong; Xingfu Li; Huan Liu; Cong Li; Jingran Yang; Hongjiang Pan; Baipo Shu; Chao Deng; Junqi Fang; Xinkun Zhu

doi:10.1088/2053-1591/ac5a37

Materials Research Express (Jan 2022)

Effect of bimodal grain size and gradient structure on heterogeneous deformation induced (HDI) stress and mechanical properties of Cu

Yi Yang,
Yulan Gong,
Xingfu Li,
Huan Liu,
Cong Li,
Jingran Yang,
Hongjiang Pan,
Baipo Shu,
Chao Deng,
Junqi Fang,
Xinkun Zhu

Affiliations

Yi Yang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Yulan Gong: Faculty of Science, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Xingfu Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Huan Liu: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Cong Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Jingran Yang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Hongjiang Pan: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Baipo Shu: Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China
Chao Deng: Faculty of Materials Science and Engineering, Chongqing University , Chongqing, 400044, People’s Republic of China
Junqi Fang: Shimadzu management China Co, No. 230 Gaotang Road, Tianhe District, Guangzhou, Ltd, People’s Republic of China
Xinkun Zhu: ORCiD; Faculty of Materials Science and Engineering, Kunming University of Science and Technology , Kunming, Yunnan, 650093, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ac5a37
Journal volume & issue: Vol. 9, no. 3
p. 035004

Abstract

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In this study, two different types of heterogeneous structures were prepared by controlling different surface mechanical attrition treatment (SMAT) time (5 s, 10 s, 30 s, 60 s). The effect of heterogeneous Cu with bimodal grain size structure (BGSS) and gradient structure (GS) on heterogeneous deformation induced (HDI) stress and mechanical properties was investigated systematically. By combining surface morphology with microhardness distribution, it was found that the surface grains of the SMAT-ed Cu (5 s and 10 s) were partially refined to exhibit BGSS, while the surface grains of SMAT-ed Cu (30 s and 60 s) were sufficiently refined to form GS. The load-unload-reload (LUR) tests results showed that HDI stress for SMAT 60s Cu was much higher than that of the SMAT 10s Cu. Furthermore, microstructure characterizations revealed that SMAT-ed Cu with BGSS and GS suppressed strain localization, which resulted in high strength and reasonable ductility.

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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