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个人信息Personal Information
副教授
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：材料科学与工程学院
学科：材料加工工程. 材料表面工程
办公地点：大连甘井子区软件园路80号大连理工大学科技园大厦B座510房间
联系方式：HANDY:13998509875 TEL: 86-411-84706561-8051 FAX: 86-411-84788732 deng@dlut.edu.cn 191753572@qq.com
电子邮箱：deng@dlut.edu.cn
Microstructures and Wear Resistance of CoCrFeNi2V0.5Tix High-Entropy Alloy Coatings Prepared by Laser Cladding
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论文类型：期刊论文
发表时间：2020-05-01
发表刊物：CRYSTALS
收录刊物：SCIE
卷号：10
期号：5
ISSN号：2073-4352
关键字：laser cladding; high-entropy alloy coating; Ti-6Al-4V; wear resistance
摘要：CoCrFeNi2V0.5Tix high entropy alloy coatings were synthesized by laser cladding on Ti-6Al-4V (annotated as TC4) substrate. The microstructures, hardness, and wear properties of the coatings were studied in detail. The results showed that these coatings were all composed of body-centered cubic (BCC) solid solution, (Co,Ni)Ti-2 phase, and Ti-rich phase. With the increase of Ti content (x in the range of 0-1.0), the hardness of these coatings (about 960 HV) was basically unchanged and stabilized, whereas, when x was increased to 1.25, the correspondent hardness was decreased significantly to about 830 HV. Compared with original substrate, the wear resistance of high-entropy alloy (HEA) coatings was greatly improved. In particular, CoCrFeNi2V0.5Ti0.75 (donated as Ti0.75) exhibited the lowest wear rate, width, and depth of tracks of wear, indicating the best wear resistance. Moreover, the wear mechanisms of Ti0.75 coating were mainly adhesive wear and oxidative wear.