Microstructures and wear properties of surface treated Ti-36Nb-2Ta-3Zr-0.35O alloy by electron beam melting (EBM)

被引：19
作者：
Chen, Zijin [1 ]
Liu, Yong [1 ]
Wu, Hong [1 ]
Zhang, Weidong [1 ]
Guo, Wei [2 ]
Tang, Huiping [3 ]
Liu, Nan [3 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Max Planck Inst Eisenforsch GmbH, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany
[3] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2015年 / 357卷
基金：
高等学校博士学科点专项科研基金; 国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Electron beam melting; Gum metal; Microstructure; Surface modification; Wear resistance; MECHANICAL-PROPERTIES; ION-IMPLANTATION; TI6AL4V PARTS; BETA-TYPE; LASER; CONTACT; PERFORMANCE; FABRICATION; COMPOSITES; RESISTANCE;
D O I：
10.1016/j.apsusc.2015.09.240
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ti-36Nb-2Ta-3Zr-0.35O (wt.%) (TNTZO, also called gum metal) alloy was surface treated by electron beam melting (EBM), in order to improve wear properties. The microstructures and phase constitutions of the treated surface were characterized by optical microscopy (OM), scanning electron microscopy (SEM), grazing incidence X-ray diffraction (GIXD) and electron backscattered diffraction (EBSD). The results showed that the martensitic phase and dendrites were formed from the beta phase alloy after the EBM treatment, and microstructures in the surface changed with the processing parameters. Compared with the untreated TNTZO alloy, the surface modified TNTZO alloys exhibited higher nano-hardness, 8.0 GPa, and the wear loss was also decreased apparently. The samples treated at a scanning speed of 0.5 m/s exhibited the highest wear resistance due to the fast cooling rate and the precipitation of acicular alpha '' phase. The relationship between the wear property and the surface microstructure of TNTZO alloy was discussed. (C) 2015 Elsevier B.V. All rights reserved.
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页码：2347 / 2354
页数：8
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