Effect of the Addition of Cu and Al on the Microstructure, Phase Composition and Properties of a Ti-6Al-4V Alloy Obtained by Selective Laser Melting

IF 2.6 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Metals Pub Date : 2024-08-30 DOI:10.3390/met14090991
Galina M. Zeer, Yuri I. Gordeev, Elena G. Zelenkova, Artur K. Abkaryan, Evgeny V. Gerasimov, Mikhail Yu. Kuchinskii, Sergey M. Zharkov
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Abstract

The present study considers the samples of an Ti-6Al-4V alloy obtained by selective laser melting with the addition of a 10% Cu-Al powder mixture. The microstructure, elemental composition and phase composition, as well as the physico-chemical properties, have been investigated by the methods of electron microscopy, X-ray phase analysis, and bending testing. The obtained samples have a relative density of 98.5 ± 0.1%. The addition of the Cu-Al powder mixture facilitates supercooling during crystallization and solidification, which allows decreasing the size and changing the shape of the initial β-Ti grains. The constant cooling rate of the alloy typical for the SLM technology has been shown to be able to prevent martensitic transformation. The formation of a structure that consists of β-Ti grains, a dispersed eutectoid mixture of α-Ti and Ti2Cu grains, and a solid solution of Al in Cu has been revealed. In the case of doping by the 10% Cu-Al mixture, the physico-mechanical properties are improved. The hardness of the samples amounts to 390 HRC, with the bending strength being 1550 ± 20 MPa and deformation of 3.5 ± 0.2%. The developed alloy can be recommended for applications in the production of parts of jet and car engines, implants for medicine, and corrosion-resistant parts for the chemical industry.
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添加铜和铝对通过选择性激光熔化获得的 Ti-6Al-4V 合金的微观结构、相组成和性能的影响
本研究考虑的是通过选择性激光熔化获得的 Ti-6Al-4V 合金样品,其中添加了 10% 的铜铝混合粉末。通过电子显微镜、X 射线相分析和弯曲测试等方法,对其微观结构、元素组成、相组成以及物理化学特性进行了研究。所得样品的相对密度为 98.5 ± 0.1%。铜铝粉末混合物的加入促进了结晶和凝固过程中的过冷,从而减小了初始 β-Ti 晶粒的尺寸并改变了其形状。事实证明,SLM 技术典型的合金恒定冷却速度能够防止马氏体转变。结果表明,合金结构由 β-Ti 晶粒、α-Ti 和 Ti2Cu 晶粒的分散共晶混合物以及铝在铜中的固溶体组成。在掺入 10% Cu-Al 混合物的情况下,物理机械性能得到了改善。样品的硬度达到 390 HRC,弯曲强度为 1550 ± 20 MPa,变形量为 3.5 ± 0.2%。所开发的合金可推荐用于生产喷气式飞机和汽车发动机部件、医药植入物以及化学工业中的耐腐蚀部件。
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来源期刊
Metals
Metals MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING
CiteScore
4.90
自引率
13.80%
发文量
1832
审稿时长
1.5 months
期刊介绍: Metals (ISSN 2075-4701) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Metals provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of metals.
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