Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7969644 | Materials Characterization | 2016 | 5 Pages |
Abstract
Ni-Cr-Co-Ti-V-Al high-entropy alloy coating on Ti-6Al-4V was synthesized by laser surface alloying. The coating is composed of a B2 matrix and (Co, Ni)Ti2 compounds with few β-Ti phases. Focused ion beam technique was utilized to prepare TEM sample and TEM observations agree well with XRD and SEM results. The formation of HEA phases is due to high temperature and rapid cooling rate during laser surface alloying. The thermodynamic parameters, ÎHmix, ÎSmixand δ as well as ÎÏ, should be used to predict the formation of the BCC solid solution, but they are not the strict criteria. Especially when ÎÏ reaches a high value (â¥Â 10%), BCC HEA will be partially decomposed, leading to the formation of (Co, Ni)Ti2 compound phases.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Zhaobing Cai, Guo Jin, Xiufang Cui, Zhe Liu, Wei Zheng, Yang Li, Liquan Wang,