Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing

doi:10.12442/j.issn.1002-185X.20230703

Home > Archive>Volume 53, Issue 8, 2024 >2123-2130. DOI:10.12442/j.issn.1002-185X.20230703

Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing
DOI:
                        10.12442/j.issn.1002-185X.20230703
                    
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Affiliation:1.Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China;2.Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China;3.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
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Fund Project:Key Realm R&D Program of Guangdong Province (2018B090904004); Supported by State Key Laboratory of Advanced Metals and Materials (2022-Z16); Key Research Program of Guangzhou (202206040001); International Science and Technology Cooperation Program of Guangdong Province (2022A0505050025); Guangdong Academy of Science Project of Science and Technology Development (2020GDASYL-20200504001, 2022GDASZH-2022010107, 2022GDASZH-2022010109); National Key Research and Development Project (2022YFC2406000)

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Abstract:

Ti-25Ta alloy samples were fabricated by selective laser melting, and the relative density, microstructure, microhardness and tensile properties of the as-built and hot isostatic pressing (HIP)-prepared samples were characterized. Results show that the track width and penetration depth are increased with the increase in laser power, and the surface morphology is improved. The maximum relative density improves from 95.31% to 98.01% after HIP process. Moreover, the microstructure is refined into the lath martensite and cellular grains with the increase in input power. After densification treatment, the subgrain coalescence occurs and high angle grain boundaries are formed. In addition, HIP process stabilizes the microhardness and enhances the tensile strength and elongation.

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[Pu Yunna, Zhao Dewei, Liu Binbin, Shi Qi, Li Junlei, Tan Chong, Shen Zhengyan, Xie Huanwen, Liu Xin. Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing[J]. Rare Metal Materials and Engineering,2024,53(8):2123~2130.]
DOI：10.12442/j. issn.1002-185X.20230703

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Received:November 08,2023
Revised:December 15,2023
Adopted:January 05,2024
Online: August 09,2024
Published: August 08,2024

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