Low-cycle fatigue behavior of permanent-mold cast and die-cast Al-Si-Cu-Mg-Sc aluminum alloys
The low-cycle fatigue behaviors of permanent-mold cast and die-cast Al-Si-Cu-Mg-Sc alloys at room temperature were investigated.The results show that at the higher total strain amplitudes,both permanent-mould cast and die-cast Al-Si-Cu-Mg-Sc alloys exhibit the cyclic strain hardening.However,at the lowest total strain amplitude,the cyclic strain hardening occurs in the initial and middle stages of fatigue deformation and the stable cyclic stress response is noted in the later stage of fatigue deformation for the permanent-mould cast alloy,while the cyclic strain hardening phenomenon is observed during whole fatigue deformation for the die-cast alloy.At the same total strain amplitude,the die-cast alloy shows the higher cyclic deformation resistance than the permanent-mold cast alloy.Compared with the permanent-mold cast alloy,the die-cast alloy possesses the longer fatigue life at the lower total strain amplitudes.The relationship between both elastic and plastic strain amplitudes with reversals to failure shows a monotonic linear behavior for both permanent-mold cast and die-cast Al-Si-Cu-Mg-Sc alloys.
permanent-mold cast die-cast aluminum alloy microstructure low-cycle fatigue cyclic stress response fatigue life
Che Xin Li Feng Chen Lijia
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
国际会议
香港
英文
1044-1049
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）