期刊
MATERIALS
卷 15, 期 13, 页码 -出版社
MDPI
DOI: 10.3390/ma15134535
关键词
titanium alloy Ti-6Al-4V; additive manufacturing; electron beam melting; micro-arc oxidation; MAO coating; thickness; roughness; surface morphology; structure; composition; heat resistance; thermal cycling test
类别
资金
- Russian Science Foundation [21-79-30058]
In this study, coatings with a thickness ranging from 27 to 62 micrometers were formed on electron beam melted Ti-6Al-4V through micro-arc oxidation (MAO). It was found that the current density and treatment time had significant effects on the coating thickness and surface roughness, with an increase in values as the current density increased. After thermal cycling tests, the coatings formed in 30 minutes at a current density of 20 A/dm² exhibited the best surface morphology, thickness, and roughness.
Coatings with a thickness from 27 to 62 mu m on electron beam melted Ti-6Al-4V have been formed by micro-arc oxidation (MAO) in a silicate-hypophosphite electrolyte. MAO tests in the anode-cathode mode (50 Hz) with an anode-to-cathode current ratio of 1:1 and sum current densities 10 and 20 A/dm(2) were carried out. The duration of the MAO treatment was 30 and 60 min. The effect of the processing parameters on the structural properties of the MAO treated coatings was studied. The current density and treatment time significantly affect the coating thickness and surface roughness. The values of these characteristics increase as the current density increases. The effect of thermal cycling tests on surface morphology, thickness and roughness, and elemental and phase composition of MAO coatings was analyzed. After 50 cycles of thermal cycling from +200 degrees C to -50 degrees C, no cracking or delamination of coatings was observed. Coatings formed in 30 min at a current density of 20 A/dm(2) turned out to be the best in terms of such indicators as surface morphology, thickness, and roughness.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据