Thesis
Corrosion behavior and mechanical property of AZ 31 magnesium alloy in simulated body fluid
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/102889
Abstract
Corrosion process and mechanical property of AZ 31 magnesium alloy immersed in simulated body fluid at body temperature (37' C) have been investigated. The corrosion rate of AZ 31 was measured after 24, 72, 168 and 336 hours of immersion. The corrosion rate increased to highest at 24 hours and dropped at 72 hours due to the formation of Mg (OH)2 and then increased slightly at 168 hours and decreased over time. Scanning electron microscope (SEM) was used for the surface morphology of AZ 31 magnesium alloy. It was found that network-like cracks and pits were the main damages caused by corrosion and the corrosion type of magnesium alloy is localized corrosion. Corrosion process and mechanical integrity of 200' C heat treated AZ 31 magnesium alloy were studied as well. The grain size of AZ 31 magnesium alloy increased as heat treatment time extended. Half an hour, 24 hours and 72 hours heat treated AZ 31 magnesium alloy showed higher corrosion rate compared to untreated samples. Compression test showed that Young’s modulus, yield strength and ultimate compressive strength of heat treated AZ 31 magnesium alloy were reduced after immersed in simulated body fluid. Heat treatment did not improve the mechanical property of AZ 31 magnesium alloy after immersed in simulated body fluid.
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Details
- Title
- Corrosion behavior and mechanical property of AZ 31 magnesium alloy in simulated body fluid
- Creators
- Wenxue Lin
- Contributors
- Q. Z. Li (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525028601842
- Language
- English
- Resource Type
- Thesis