Hierarchical microstructure induced by hydrostatic pressure in a metastable β-Ti alloy

Tao Yin; Si Chen; Juan Mu; Haiyang Chen; Huiyang Gou; Xuan Liu; Xiang Gao; Wenge Yang; Yandong Wang

Materials & Design (Jul 2024)

Hierarchical microstructure induced by hydrostatic pressure in a metastable β-Ti alloy

Tao Yin,
Si Chen,
Juan Mu,
Haiyang Chen,
Huiyang Gou,
Xuan Liu,
Xiang Gao,
Wenge Yang,
Yandong Wang

Affiliations

Tao Yin: Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China
Si Chen: Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Juan Mu: Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Haiyang Chen: Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Huiyang Gou: Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China
Xuan Liu: Chongqing Talent New Energy Co., Ltd., Chongqing 401133, China
Xiang Gao: Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China; Corresponding author.
Wenge Yang: Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China; Corresponding author.
Yandong Wang: Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China; Corresponding author at: Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.

Journal volume & issue: Vol. 243
p. 113042

Abstract

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Hydrostatic pressure is a crucial tool to regulate the structure and properties of materials. However, the influence of hydrostatic pressure on the microstructure of metastable β-Ti alloys remains unclear. In this work, the microstructure and microhardness evolution of a metastable β-type Ti-30Zr-10Nb alloy under hydrostatic pressure (≤10 GPa) were investigated and compared with those under uniaxial pressure (≤1106 MPa). The results revealed that under hydrostatic pressure, Ti-30Zr-10Nb alloy formed a peculiar hierarchical microstructure composed of submicron-scaled α” plates with self-accommodating morphologies, nanoscale ω particles, and microscale shear bands containing nanoscale α” domains. The formation of a hierarchical microstructure effectively coordinates not only the isotropic macroscopic strains but also the local shear stresses under hydrostatic pressure. Compared to uniaxial pressure, the hydrostatic pressure facilitates the β to ω transformation, but hinders the β to α” transformation. The microhardness of the Ti3010 alloy reaches approximately 319 HV at a hydrostatic pressure of 10 GPa, which is 28 % higher than the highest microhardness obtained under uniaxial pressure. The current results highlight the promising potential of hydrostatic pressure in optimizing the mechanical properties of metastable β-Ti alloys.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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