Porosities and Fatigue Property of Two A356 Cast Aluminum Alloy

Yuan Bin Zhang; Cheng Xin Teng; Tong Guang Zhai

doi:10.4028/www.scientific.net/AMM.423-426.263

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 423-426Porosities and Fatigue Property of Two A356 Cast...

Porosities and Fatigue Property of Two A356 Cast Aluminum Alloy

Abstract:

To investigate the fatigue property of A356 cast aluminum alloy, the pore size distribution in two kinds of A356 alloy were statistically tested, and the S-N curves were plotted by conducting four-point bend fatigue test, then the fractography of the fatigue specimens were examined under scan electron microscope (SEM). It was indicated that the fatigue strength of the A356.2 alloy contenting more large pores and rougher crystalline grain was lower than that of A356.1 alloy, though the yield strength of A356.2 alloy was higher. Most of the fatigue cracks initiated from the pores that located on or close to the surface of the specimens, and the fracture of the specimens were induced from the growth of multi-sites initiated fatigue crack.

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Periodical:

Applied Mechanics and Materials (Volumes 423-426)

Pages:

263-266

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.423-426.263

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Online since:

September 2013

Authors:

Yuan Bin Zhang, Cheng Xin Teng, Tong Guang Zhai

Keywords:

A356 Cast Aluminum Alloy, Fatigue Property, Pore

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