Mg Content Dependence of EML-PVD Zn-Mg Coating Adhesion on Steel Strip

被引：9

作者：

Jung, Woo Sung ^{[1
]}

Lee, Chang Wook ^{[1
]}

Kim, Tae Yeob ^{[2
]}

De Cooman, Bruno C. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Mat Design Lab, Grad Inst Ferrous Technol, Pohang, South Korea

[2] POSCO Tech Res Labs, Gwangyang, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 09期

关键词：

FRACTURE-MECHANICS ANALYSIS; ATMOSPHERIC CONDITIONS; COATED STEEL; CORROSION-RESISTANCE; ZINC; TECHNOLOGY; STRENGTH; ALLOYS; SHEET;

D O I：

10.1007/s11661-016-3634-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of coating thickness and Mg concentration on the adhesion strength of electromagnetic levitation physical vapor deposited Zn-Mg alloy coatings on steel strip was investigated. The phase fraction of Zn, Mg2Zn11, and MgZn2 was determined for a coating Mg concentration in the 0 to 15 wt pct range. Coatings with a Mg content less than 5 pct consisted of an Zn and Mg2Zn11 phase mixture. The coatings showed good adhesion strength and ductile fracture behavior. Coatings with a higher Mg concentration, which consisted of a Mg2Zn11 and MgZn2 phase mixture, had a poor adhesion strength and a brittle fracture behavior. The adhesion strength of PVD Zn-Mg alloy coatings was found to be related to the pure Zn phase fraction. The effect of coating thickness on adhesion strength was found to be negligible. The microstructure of the interface between steel and Zn-Mg alloy coatings was investigated in detail by electron microscopy, electron diffraction, and atom probe tomography.

引用

页码：4594 / 4605

页数：12

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