Influence of cerium on the microstructure, mechanical properties and corrosion resistance of magnesium alloy

被引：89

作者：

Fan, Yu ^{[1
]}

Wu, Guohua ^{[1
]}

Zhai, Chunquan ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200030, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 433卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

AZ91D; microstructure; cerium; corrosion morphology; potentiodynamic polarization;

D O I：

10.1016/j.msea.2006.06.109

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

The influence of cerium on the microstructure, mechanical properties and corrosion resistance of AZ91D was investigated. By adding 2% cerium to AZ91D alloy, the ultimate tensile strength and the elongation increased by 19.3% and 104.0%, respectively. This was mainly caused by the refinement of the P phase and the formation of Al4Ce strengthening phase. By adding 2% Ce, the corrosion rate decreased to 21.8% of the AZ91D corrosion rate. The corrosion morphologies indicated that the addition of cerium formed the more continuous 0 phase, which acted as a corrosion barrier. The Auger depth profiles indicated that the corrosion film on AZ91D + 2% Ce had a two-layer structure: an outer layer and an Al-enriched inner layer. This Al-enriched layer contributes to the improved corrosion resistance of AZ91D. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：208 / 215

页数：8

共 20 条

[1]

Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].