Influence of trace silicon addition on microstructure and properties of Ti6Al4V fabricated by wire arc additive manufacturing

Zhenwen Chen; Yong Peng; Xiaoyong Zhang; Jikang Fan; Shen He; Jian Kong; Kehong Wang

Journal of Materials Research and Technology (Mar 2023)

Influence of trace silicon addition on microstructure and properties of Ti6Al4V fabricated by wire arc additive manufacturing

Zhenwen Chen,
Yong Peng,
Xiaoyong Zhang,
Jikang Fan,
Shen He,
Jian Kong,
Kehong Wang

Affiliations

Zhenwen Chen: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Yong Peng: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Xiaoyong Zhang: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Jikang Fan: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Shen He: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Jian Kong: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding author.
Kehong Wang: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding author.

Journal volume & issue: Vol. 23
pp. 1347 – 1359

Abstract

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To provide a pathway to improve the tensile properties of wire arc additive manufactured Ti6Al4V, the microstructures and properties of Ti6Al4V-0.1Si produced by the wire arc additive manufacturing were investigated in this study. It was demonstrated that the tensile strength of Ti6Al4V-0.1Si improved more than 100 MPa compared with traditional WAAM Ti6Al4V. The microstructures of WAAM Ti6Al4V and Ti6Al4V-0.1Si mainly consists of basket-weave structures but the width of the α-phase lamellae of Ti6Al4V-0.1Si is significantly lower.The added Si is solid-soluble on the α phase matrix of Ti6Al4V, which reduces the β phase transition temperature. Si as well produces the high growth restriction effect, then the α phase size is refined. The fine grain and solid solution strengthening are the main reasons for the increase in the strength of titanium alloy after adding trace Si.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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