Effect of compression deformation on the microstructure and corrosion behavior of magnesium alloys

详细信息	查看全文 | 推荐本文 |

• 作者：Y. Snir^a ; G. Ben-Hamu^b ; ^{guy@sce.ac.il} ; D. Eliezer^a ; E. Abramov^a
• 关键词：Magnesium alloy ; Corrosion ; Deformation ; TEM
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：5 July, 2012
• 卷：528
• 期：Complete
• 页码：84-90
• 文件大小：1454 K

摘要

The effect of deformation on the corrosion and mechanical behavior of wrought Mg-alloys AZ31, AM50, and ZK60 was investigated. The materials鈥?behavior was correlated to the changes in metallurgical features, during compression, into different amounts of deformation at three temperatures: 250掳 C, 280掳 C, and 350掳 C. The metallurgical features were monitored by optical microscope, scanning electron microscope (SEM), and transmission electron microscopy (TEM). It was observed that there is a very strong correlation between three features: 1. metallurgical features (mainly twinning, dislocation accumulation, and dynamic recrystallization); 2. The thermo-mechanical state (amount of deformation and its temperature); and 3. The corrosion behavior of wrought Mg-alloys. This correlation was emphasized by the mechanical behavior measured through micro-hardness. Microstructural changes during deformation, and potentio-dynamic corrosion tests were correlated. These results show that studies on the effect of thermo-mechanical state (related to the microstructure) on the corrosion behavior of wrought Mg-alloys are essential in order to optimize their applicability to plastic forming processes.