Effect of Cu addition on overaging behaviour, room and high temperature tensile and fatigue properties of A357 alloy
作者： Lorella CESCHINI , Simone MESSIERI , Alessandro MORRI , Salem SEIFEDDINE , Stefania TOSCHI
DOI: 10.1016/S1003-6326(20)65427-9
关键词: Ultimate tensile strength 、 Microstructure 、 Fatigue limit 、 Composite material 、 Dendrite (crystal) 、 Alloy 、 Work (thermodynamics) 、 Materials science
摘要: Abstract The aims of the present work are to evaluate overaging behaviour investigated Cu-enriched alloy and assess its mechanical behaviour, in terms tensile fatigue strength, at room temperature 200 °C, correlate performance with microstructure, particular secondary dendrite arm spacing (SDAS). tests carried out on overaged °C indicate that addition about 1.3 wt.% Cu A357 enables maintain ultimate strength yield values close 210 MPa, respectively, 100 MPa. Compared quaternary (Al−Si−Cu−Mg) C355, A357−Cu has greater properties comparable condition °C. microstructural analyses highlight SDAS affects peak-aged temperature, while influence is negligible
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