Effect of Heat Treatment on Microstructure and Thermal Fatigue Properties of Al-Si-Cu-Mg Alloys
作者： Wei Chao , Liu Guang-lei , Wan Hao , Li Yu-shan , Si Nai-chao
关键词: Mg alloys 、 Materials science 、 Metallurgy 、 Materials processing 、 Secondary phase 、 Fatigue resistance 、 Thermal fatigue 、 Microstructure
摘要: The effect of heat treatment on the microstructure and thermal fatigue properties were studied by means of optical microscope (OM) and scanning electron microscope (SEM). Energy dispersive X-ray detector (EDX) was used to analyze the role of phase composition in fatigue crack propagation. The results show that after heat treatment, the ultimate tensile strength increased from 285 MPa to 368 MPa and the elongation increased from 5.8% to 6.5%. During the initiation of fatigue crack, the crack was mainly propagated through eutectic …
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