Study on Defects of A356 Aluminum Alloy Wheel

Wei Min Zhao; Liang Zhang; Zhi Feng Wang; Hong Ji Yan

doi:10.4028/www.scientific.net/AMR.189-193.3862

Paper Titles

Microstructure and Microsegregation in Directionally Solidified FeCoNiCrAl High Entropy Alloy
p.3840

Kiss-Point Position Control of Solidification Layer and Process Optimization for Twin-Roll Casting of Magnesium Alloys
p.3844

Experimental Research on the Semi-Solid Formability of 7A09 Aluminum Alloy Impeller
p.3852

Segregation of C, P and Mn in Rapid Solidified Carbon Steels
p.3857

Study on Defects of A356 Aluminum Alloy Wheel
p.3862

Effect of Ce₂S₃ Powder Addition on Morphology of Graphite in Cast Iron
p.3866

Analyses of Interfacial Thermal Stresses for DLC/WC-Co
p.3870

Simulation of Facet Dendritic Shape of Isothermal Alloy in a Forced Flow by Phase Field Method
p.3874

Defects Analysis and Improvement for Electricmotorcar Aluminum Alloy Wheel by Gravity Casting
p.3880

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 189-193Study on Defects of A356 Aluminum Alloy Wheel

Study on Defects of A356 Aluminum Alloy Wheel

Abstract:

This paper studied the effects of inclusion and slag on properties of a die cast A356 alloy wheel. The result showed that the rate of defect is important for the mechanical properties. The tensile strength and extension was not dropped but the rate of defect is increased about 2%. The variation trend of tensile strength and extension is linear, while the area of porosity on tensile fracture is between 2% and 6%. However, the tensile strength and extension was dropped with the increasing rate of defect. The variation trend of mechanical properties of the sample with inclusion is stable, but the sample with slag is not stable. The mechanical properties of samples with inclusion are drastically changed, while the rate of defect is increased. The mechanical properties of samples with slag are smoothly. The EDS analysis indicated that the defects consist of Al-Ti-B compound, α-phase (Al₁₂FeSi), β-phase (Al₉Fe₂Si₂) and Al₂O₃. These oxides form the compact composite oxide film expand into first cracks. The fracture mode of sample with defects is brittle fracture. The values of the Secondary dendrite arm spacing (DAS) in the inclusion and the matrix are the same, while the values of DAS in the slag and the matrix are different.