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Selective laser melted near-beta titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe: Microstructure and mechanical properties

选择性激光熔融法制备Ti-5Al-5Mo-5V-1Cr-1Fe 近β钛合金的微观组织和力学性能

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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.

摘要

本文采用选择性激光熔融法制备了Ti-5Al-5Mo-5V-1Cr-1Fe 近β钛合金, 并研究了Ti-5Al-5Mo5V-1Cr-1Fe 合金在打印过程的组织演变和力学性能。Ti-5Al-5Mo-5V-1Cr-1Fe 合金组织为近β钛合金 (相含量大于98.1%)且在β晶粒内部存在大量亚微米级的晶胞组织, β柱状晶平行于构建方向。扫描间 距、扫描功率等选择性激光熔融工艺参数显著影响Ti-5Al-5Mo-5V-1Cr-1Fe 合金的微观组织和力学性 能。制备的Ti-5Al-5Mo-5V-1Cr-1Fe 合金屈服强度为818 MPa, 伸长率超过19%, 表明选择性激光熔 融法是一种有潜力的近β钛零件制造技术。

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Authors and Affiliations

  1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Hua-long Huang  (黄华龙), Dan Li  (李丹), Chao Chen  (陈超), Rui-di Li  (李瑞迪), Xiao-yong Zhang  (张晓泳), Shi-chao Liu  (刘世超) & Ke-chao Zhou  (周科朝)

  2. Shenzhen Research Institute, Central South University, Shenzhen, 518057, China

    Chao Chen  (陈超)

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  1. Hua-long Huang  (黄华龙)
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Correspondence to Chao Chen  (陈超).

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Foundation item

Project(2019B010943001) supported by Key-area Research and Development Program of Guangdong Province, China; Project(2020) supported by the Fund of State Key Laboratory of Powder Metallurgy, Central South University, China

Contributors

CHEN Chao provided the concept and edited the draft of manuscript. HUANG Hua-long conducted the literature review and wrote the first draft of the manuscript. LI Dan and LIU Shi-chao analyzed the measured data. LI Rui-di, ZHANG Xiao-yong, and ZHOU Ke-chao edited the draft of manuscript. All authors replied to reviewers’ comments and revised the final version.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Huang, Hl., Li, D., Chen, C. et al. Selective laser melted near-beta titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe: Microstructure and mechanical properties. J. Cent. South Univ. 28, 1601–1614 (2021). https://doi.org/10.1007/s11771-021-4720-z

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