Effects of Master Alloy Powders on Electrochemical Performance of Selective Laser Melted TMZF Alloy

被引：1
|
作者：
Chu Qingkun [1 ,2 ]
Deng Zhaoyang [2 ]
Yan Xingchen [2 ]
Ma Wenyou [2 ]
Hu Yongjun [1 ]
Liu Min [2 ]
机构：
[1] Guangdong Univ Technol, Coll Mat & Energy, Guangzhou 510006, Peoples R China
[2] Guangdong Acad Sci, Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510650, Peoples R China
来源：
CHINA SURFACE ENGINEERING | 2020年 / 33卷 / 06期
关键词：
selective laser melting; mixed powders; Ti-12Mo-6Zr-2Fe; microstructure; corrosion resistance; TITANIUM-ALLOYS; STRENGTH; IMPROVEMENT; MODULUS; PHASE; SLM;
D O I：
10.11933/j.issn.1007-9289.20201021001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In order to investigate the electrochemical corrosion behavior of selective laser melting (SLM) Ti-12Mo-6Zr-2Fe (TMZF) beta titanium alloy, pure Mo powders and Mo-Fe master alloy powders were used to form mixed powders for laser additive manufacturing. The effect of master alloy powders on the microstructure and electrochemical properties of TMZF alloy sample was studied. The corrosion electrochemical properties of SLM TMZF samples fabricated via the two different mixed powders were systematically studied and compared. Phase composition, microstructural characteristics, elements distribution and corrosion resistance of the SLM TMZF samples were investigated using XRD, OM, SEM, EDS and electrochemical corrosion (EC). Results show that both SLM-beta-1 (prepared by mixing a variety of pure metal powders) and SLM-beta-2 (prepared by mixing intermetallic compounds powders) samples contain a large amount of beta-Ti microstructure. SLM-beta-1 sample show higher impedance in Bode plots. The capacitive arc radius of SLM-beta-1 sample is larger than that of SLM-beta-2 sample in Nyquist plots. The breakdown potential of passive film of SLM-beta-1 sample in potentiodynamic polarization curve is higher than that of SLM-beta-2 sample. Comprehensive comparison show that the corrosion resistance of SLM-beta-1 (prepared by mixing a variety of pure metal powders) sample is better than that of SLM-beta-2 (prepared by mixing intermetallic compounds powders) sample under different mixed powders.
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收藏
页码：128 / 135
页数：8
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