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中南大学学报(英文版)

Journal of Central South University

Vol. 28    No. 6    June 2021

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Selective laser melted near-beta titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe:Microstructure and mechanical properties
HUANG Hua-long(黄华龙)1, LI Dan(李丹)1, CHEN Chao(陈超)1, 2, LI Rui-di(李瑞迪)1, ZHANG Xiao-yong(张晓泳)1, LIU Shi-chao(刘世超)1, ZHOU Ke-chao(周科朝)1

1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Shenzhen Research Institute, Central South University, Shenzhen 518057, China

Abstract:In this work, a near-beta Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy was fabricated by selective laser melting (SLM), and the microstructure evolution together with the mechanical properties was studied. The as-fabricated alloy showed columnar β grains spreading over multiple layers and paralleling to the building direction. The distinct microstructure of as-fabricated alloy was composed of near-β (more than 98.1 %) with a submicron cellular structure. Different SLM processing parameters such as hatch spacing could affect the microstructure of as-fabricated alloy, which could thus further significantly affect the mechanical properties of as-fabricated alloy. In addition, the as-fabricated alloy with the distinct microstructure exhibits yield strength of 818 MPa combined with elongation of more than 19 %, which shows that SLM is a potential technology for manufacturing near-beta titanium components.

 

Key words: selective laser melting; Ti-5Al-5Mo-5V-1Cr-1Fe; near-β and β-titanium alloy; cellular structure; precipitation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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