Combining manufacturing of titanium alloy through direct energy deposition and laser shock peening processes

Jiaxuan Chi; Zhongyi Cai; Hepeng Zhang; Hongqiang Zhang; Wei Guo; Zhandong Wan; Guofeng Han; Peng Peng; Zhi Zeng

Materials & Design (May 2021)

Combining manufacturing of titanium alloy through direct energy deposition and laser shock peening processes

Jiaxuan Chi,
Zhongyi Cai,
Hepeng Zhang,
Hongqiang Zhang,
Wei Guo,
Zhandong Wan,
Guofeng Han,
Peng Peng,
Zhi Zeng

Affiliations

Jiaxuan Chi: School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130025, China; School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Zhongyi Cai: School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130025, China
Hepeng Zhang: School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130025, China; School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Hongqiang Zhang: School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Wei Guo: School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China; Corresponding authors.
Zhandong Wan: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Guofeng Han: National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
Peng Peng: School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Zhi Zeng: School of Mechanical and Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China; Corresponding authors.

Journal volume & issue: Vol. 203
p. 109626

Abstract

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Combined manufacturing of direct energy deposition (DED) and laser shock peening (LSP) exhibits great potentials in repairing titanium alloy components and improving their mechanical properties. In this study, a DEDed repaired sample was fabricated by depositing TA15 powders on a forged TC17 plate, and subjected to a following LSP treatment. The effects of LSP on microstructures, residual stress, and tensile properties of DEDed samples were evaluated. After LSP, a high-level compressive residual stress state (maximum =−596 MPa) and microstructure refinement were induced in the treated surface. The average α phase area decreased from 1.88 μm2 to 0.73 μm2, and much more low angle grain boundaries were induced after LSP. Meanwhile, the corresponding ultimate tensile strength (UTS) was improved by 12.46%.

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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