南京航空航天大学学报（英文版）2020，Vol.37Issue(3)：481-489,9.
退火对Ti‑6Al‑4V表面MA法制备Al‑FeCoNiCrAl高熵合金复合涂层的组织及性能研究
Microstructure and Property of Al?FeCoNiCrAl High Entropy Alloy Composite Coating on Ti?6Al?4V During Annealing Using MA Method
苏宁宁 1冯晓梅 1臧家俊 1孙静 1李焕1
作者信息
- 1. 南京航空航天大学材料科学与技术学院,南京211106,中国
- 折叠
摘要
Abstract
Al-FeCoNiCrAl high entropy alloy (HEA) composite coatings were prepared on Ti-6Al-4V via high-energy mechanical alloying (MA). The microstructures and phase composition of the coatings were studied. A continuous and dense coating could be fabricated at a ratio of 35％(weight fraction)Al-FeCoNiCrAl after 4 h milling. The results showed that the thickness of the composite coatings increased first and then decreased with the increase of milling time. And the hardness of coating increased with the increase of milling time. The phase changed during the annealing process. Part of the initial body-centered cubic(BCC)phase of the composite coatings changed into the L12 phase,(Ni,Co)3Al4 andσphase after annealing above 550℃. Ordered BCC was found in the coatings after annealing above 750 ℃. Only BCC and ordered BCC appeared in coatings after annealing above 1050 ℃. The hardness of the coatings after annealing at 550 ℃ and 750 ℃ was higher than before because of spinodal decomposition and high hardnessσphase. The hardness of the coatings after annealing at 1050℃decreased because residual stress released.关键词
高熵合金/钛合金/机械合金化/复合涂层/退火处理Key words
high entropy alloys/Ti-6Al-4V alloy/mechanical alloying/composite coating/annealing process分类
矿业与冶金引用本文复制引用
苏宁宁,冯晓梅,臧家俊,孙静,李焕..退火对Ti‑6Al‑4V表面MA法制备Al‑FeCoNiCrAl高熵合金复合涂层的组织及性能研究[J].南京航空航天大学学报（英文版）,2020,37(3):481-489,9.
