Balancing strength and ductility in additive-manufactured bulk titanium by interception of titanium hydrides

Tao Song; Zhao Liu; Yang Yang; Weisi Cai; Jiayin Li; X. Luo; Dongdong Li; Chao Yang

doi:10.1080/21663831.2024.2440041

Materials Research Letters (Mar 2025)

Balancing strength and ductility in additive-manufactured bulk titanium by interception of titanium hydrides

Tao Song,
Zhao Liu,
Yang Yang,
Weisi Cai,
Jiayin Li,
X. Luo,
Dongdong Li,
Chao Yang

Affiliations

Tao Song: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Zhao Liu: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Yang Yang: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Weisi Cai: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Jiayin Li: State Key Laboratory for Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
X. Luo: State Key Laboratory for Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
Dongdong Li: State Key Laboratory for Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
Chao Yang: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2024.2440041
Journal volume & issue: Vol. 13, no. 3
pp. 217 – 224

Abstract

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We report the interception of two titanium hydrides in bulk Ti via additive manufacturing (AM) of hydride-de-hydride (HDH) Ti powders with high H content: nano-sized, stable face-centered cubic (FCC) δ-TiHx plate within α-Ti grains and ultrafine, metastable face-centered tetragonal (FCT) γ-TiH aciculae crossing adjacent α-Ti grain boundaries. Remarkably, the AM bulk Ti achieves a surprising balance of strength and ductility, surpassing those of AM bulk Ti and TC4 alloys. This balance is attributed to effective work hardening from {111} twinning in the FCC δ-TiHx plate, a hindrance to dislocation motion, and high-density dislocation pile-ups around the FCT γ-TiH aciculae dowel connectors.

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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