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| 中国科学院金属研究所国家腐蚀与防护重点实验室 |
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Cite this article:
. . Chin J Mater Res, 2005, 19(1): 1-7.
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Abstract The effect of loading frequencies, pH values, chlorine ions and the
fluorine--containing conversion film on fatigue life of as--extruded magnesium
alloy AM60 was studied using a tensile--tension fatigue machine.
The fractographic
morphologies were observed by SEM, and the mechanisms of fatigue and the roles
of AlMn particles were mainly discussed. The results showed that the
fatigue life in ambient air has some relationship to the loading frequency when the frequency is
lower than 10 Hz, and little relationship with ~loading ~frequency ~when ~greater ~than
~10 Hz. The fatigue life decreased in neutral solution, and increased in base
solution with pH12. The conversion film containing fluorine can hardly improve the
fatigue life. The fractography showed that fatigue crack initiations were related to
AlMn particles. Fatigue cracks emanated at AlMn particles in air, while in aqueous
solutions, it initiated the corrosion pits bordering upon the AlMn particles.
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Received: 07 April 2004
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