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Growth Rate of Small Fatigue Cracks of Cast Magnesium Alloy at Different Conditions

Journal Materials Science Forum (Volumes 546 - 549)
Volume Progress in Light Metals, Aerospace Materials and Superconductors
Edited by Yafang Han et al.
Pages 77-80
DOI 10.4028/www.scientific.net/MSF.546-549.77
Citation Xi Shu Wang et al., 2007, Materials Science Forum, 546-549, 77
Online since May, 2007
Authors Xi Shu Wang, Jing Hong Fan
Keywords In Situ Observation, Cast AM50 Alloy, Crack Growth Rate (da/dN), Elevated Temperature, Fatigue
Abstract

Some differences between the growth behaviors of small fatigue crack of cast AM50 magnesium alloy at different elevated temperature and at open and closed states were investigated based on in-situ observations with scanning electron microscope (SEM). These results indicate that the growth rates of small fatigue cracks depend on not only the stress levels but also the elevated temperature and crack states. The fatigue crack growth rates were estimated based on novel and conventional methods.

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