Heterostructured titanium composites with superior strength-ductility synergy via controllable bimodal grains and <c+a> dislocation activity

Jiajing Chen; Yuanfei Han; Zichao Wei; Shaopeng Li; Zhonggang Sun; Liang Zhang; Guangfa Huang; Jianwen Le; Di Zhang; Weijie Lu

doi:10.1080/21663831.2023.2252858

Materials Research Letters (Oct 2023)

Heterostructured titanium composites with superior strength-ductility synergy via controllable bimodal grains and <c+a> dislocation activity

Jiajing Chen,
Yuanfei Han,
Zichao Wei,
Shaopeng Li,
Zhonggang Sun,
Liang Zhang,
Guangfa Huang,
Jianwen Le,
Di Zhang,
Weijie Lu

Affiliations

Jiajing Chen: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Yuanfei Han: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Zichao Wei: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Shaopeng Li: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Zhonggang Sun: Tech Institute for Advanced Materials, College of Materials Science and Technology, Nanjing Tech University, Nanjing, People’s Republic of China
Liang Zhang: Shanghai Engineering Research Center of 3D Printing Materials, Shanghai Research Institute of Materials, Shanghai, People’s Republic of China
Guangfa Huang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Jianwen Le: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Di Zhang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
Weijie Lu: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2023.2252858
Journal volume & issue: Vol. 11, no. 10
pp. 863 – 871

Abstract

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Constructing heterostructures in particulate reinforced titanium matrix composites (PRTMCs) to evade the strength-ductility trade-off dilemma is much more difficult than in metals. Here, we proposed a novel and controllable strategy of simple powder assembly to fabricate bimodal-grained PRTMCs, this customized strategy makes coarse grains (CGs) surrounded by ultrafine-grained (UFG) matrices, conferring a superior strength-ductility combination not achievable by their traditional homogeneous counterparts. We found that such heterostructures appear to promote storage of mostly dislocations in CGs and accumulation near the CG/UFG boundaries. Moreover, hybrid reinforcements also activate multiple hardening mechanisms, inducing high ductility.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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