Low-cycle fatigue behavior of permanent mold cast and die-cast Al-Si-Cu-Mg alloys |
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Authors: | Chen Lijia Wang Di Che Xin and Li Feng |
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Affiliation: | (School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China) |
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Abstract: | Fatigue failure is one of the main failure forms of Al-Si-Cu-Mg aluminum alloys.To feature their mechanical aspect of fatigue behavior,the low-cycle fatigue behavior of permanent mold cast and die-cast Al-Si-Cu-Mg alloys at room temperature was investigated.The experimental results show that both permanent mold cast and die-cast Al-Si-Cu-Mg alloys mainly exhibit cyclic strain hardening.At the same total strain amplitude,the die-cast Al-Si-Cu-Mg alloy shows higher cyclic deformation resistance and longer fatigue life than does the permanent mold cast Al-Si-Cu-Mg alloy.The relationship between both elastic and plastic strain amplitudes with reversals to failure shows a monotonic linear behavior,and can be described by the Basquin and Coffin-Manson equations,respectively. |
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Keywords: | permanent mold cast die-cast aluminum alloy low-cycle fatigue fatigue life cyclic stress response |
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