Corrosion stress relaxation and tensile strength effects in an extruded AZ31 magnesium alloy

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• 作者：Christopher A. Walton ; Holly J. Martin ; M.F. Horstemeyer ; Wilburn R. Whittington ; C.J. Horstemeyer ; Paul T. Wang
• 关键词：A. Magnesium ; A. Aluminum ; A. Alloy ; C. Pitting corrosion ; C. Hydrogen embrittlement ; C. Stress corrosion
• 刊名：Corrosion Science
• 出版年：March, 2014
• 年：2014
• 卷：80
• 期：Complete
• 页码：503-510
• 全文大小：1857 K

文摘

The corrosion effects on the tensile and stress relaxation behavior of an extruded AZ31 magnesium alloy subjected to immersion and salt-spray environments have been investigated. Specimens were simultaneously corroded and stress relaxed in a 3.5 wt.% NaCl solution and then put under a tensile test to failure to determine the stress-strain response over a 60 h test matrix. The AZ31 magnesium alloy shows an evident relaxation in 3.5 wt.% NaCl at room temperature. According to optical and scanning electron microscopy investigations, the fracture surfaces for the immersion environment show a high sensitivity to stress corrosion cracking.