INFLUENCE OF MICROSTRUCTURE OF FRICTION STIR WELDED JOINTS ON GROWTH AND PROPERTIES OF MICROARC OXIDATION COATINGS ON AZ31B MAGNESIUM ALLOY

被引：3
|
作者：
Chen, Tingfang [1 ,2 ,3 ]
Li, Yongliang [4 ]
Xue, Wenbin [1 ,2 ]
Yang, Chaolin [1 ,2 ]
Qu, Yao [1 ,2 ]
Hua, Ming [1 ,2 ]
机构：
[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Minist Educ, Key Lab Beam Technol & Mat Modificat, Beijing 100875, Peoples R China
[2] Beijing Radiat Ctr, Beijing 100875, Peoples R China
[3] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
[4] Beijing Normal Univ, Analyt & Testing Ctr, Beijing 100875, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2015年 / 22卷 / 02期
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Friction stir welded; microstructure; microarc oxidation; AZ31B magnesium alloy; PLASMA ELECTROLYTIC OXIDATION; CORROSION BEHAVIOR; ALUMINUM-ALLOY; SILICATE ELECTROLYTE; PARAMETERS; AZ61;
D O I：
10.1142/S0218625X15500298
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：
Ceramic coatings on friction stir welded (FSW) joints of AZ31B magnesium alloy were fabricated by microarc oxidation (MAO) method in silicate electrolyte. Microstructure, phase constituents, microhardness and electrochemical corrosion behaviors of bare and coated magnesium alloys at different zones of FSW joints for different oxidation time were investigated. The influence of microstructure at different zones on the growth of MAO coatings was analyzed. The results show that the MAO coatings on FSW joints are uniform, and they have almost the same morphology, phase constituents, hardness and corrosion resistance at base metal, stir zone and heat-affected zone. The properties of MAO coatings are independent on the microstructures of AZ31B alloy. In addition, the microstructures of magnesium alloy near the coating/alloy interface at different zones of FSW joint was not changed by microarc discharge process.
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页数：9
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