Corrosion behavior of near‐alpha titanium alloy fabricated by additive manufacturing

Materials and Corrosion Pub Date : 2022-07-28 DOI:10.1002/maco.202213105

S. Lavrys, I. Pohrelyuk, H. Veselivska, A. Skrebtsov, Julia Kononenko, Yu.V. Marchenko

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引用次数: 2

Abstract

The purpose of this study was to investigate the corrosion behavior of Ti–6Al–Mo–1.5V–2Zr near‐alpha titanium alloy fabricated by additive manufacturing (AM). Titanium alloy specimens were fabricated by electron beam melting (EBM) and laser metal deposition (LMD). The same titanium alloy manufactured by traditional technology (TT) was used as a control. The correlations between corrosion resistance, microstructure and phase composition of titanium alloys fabricated by different technologies were investigated, through the use of electrochemical corrosion testing, scanning electron microscopy, X‐ray diffraction, and hardness testing. In this study, it was shown that the corrosion resistance of AM samples is lower than TT samples. The corrosion resistance of AM samples was attributed to the presence of more α′ martensite and less β‐Ti phases in the microstructure of titanium alloy than for TT samples. The electrochemical results suggest that titanium alloy fabricated by EBM has better corrosion resistance in 20% HCl solution at room temperature compared to titanium alloy fabricated by LMD.

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增材制造近α钛合金的腐蚀行为

研究了增材制造(AM)制备的Ti-6Al-Mo-1.5V-2Zr近α钛合金的腐蚀行为。采用电子束熔化(EBM)和激光金属沉积(LMD)制备钛合金试样。以传统工艺(TT)生产的同种钛合金为对照。通过电化学腐蚀测试、扫描电镜、X射线衍射和硬度测试，研究了不同工艺制备的钛合金的耐蚀性、显微组织和相组成之间的关系。本研究表明，AM样品的耐蚀性低于TT样品。AM样品的耐蚀性是由于钛合金组织中α′马氏体较多，β - Ti相较少。电化学结果表明，与LMD制备的钛合金相比，EBM制备的钛合金在室温20% HCl溶液中具有更好的耐腐蚀性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Materials and Corrosion

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