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A preliminary investigation of the corrosion and stress-corrosion susceptibility of thermomechanically processed high magnesium aluminum magnesium alloys

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Author
Beberdick, Larry Edward
Date
1981-09
Advisor
McNelley, Terry R.
Edwards, M.
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Abstract
The stress corrosion cracking susceptibility and general corrosion characteristics of four thermomechanically processed high-Magnesium, Aluminum-Magnesium alloys were evaluated and compared to those of 7076-T6. Results obtained from stress-corrosion testing and from tension testing after stress-corrosion exposure indicate that these 8-10% Mg alloys are less susceptible to stress corrosion cracking than 7076-T6. the addition of Cu or CU and Mn to a 10% Mg alloy raises strength, homogenizes the microstructure and reduces the tendency of such an alloy to exhibit intergranular cracking and exfoliation, especially in a sensitized condition. Results of accelerated general corrosion testing and marine exposure both indicate that binary 8% Mg and 10% Mg alloys are highly resistant to corrosion. Alloying with Cu or Cu and Mn accelerates weight loss, but to a lesser degree than observed for 7075-T6
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/20649
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