Reliability Analysis of Brinell Hardness Results for Aged Alumix321/SiC Composites
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Aluminum/SiC composites are widely employed in the automotive industry. Aluminum composites can be produced by hot pressing which forms a final product with a low porosity level and a denser structure. Homogeneous distribution of reinforcement particles, the level of porosity, and heat treatment not only affect the mechanical properties of the composites but also the reliability of their mechanical test results. In this study, Brinell hardness test reliability analyses of the hot-pressed Alumix321/SiC composites were carried out. The effects of increasing SiC amount and aging treatment on the reliability of hardness test results were discussed. Reliability analysis revealed that the aging treatment and increasing amount of SiC reinforcement decreased the reliability of the hardness test results. The reason for this was researched and resulting cases were discussed.
KeywordsAlumix321 Powder metallurgy Composite Reliability Aging Hardness
List of Symbols
Weight percentage (%)
Pressing force (MPa)
Weighed in the air (g)
Weighed in the water (g)
Actual density (g/cm3)
Density of the water (g/cm3)
Brinell hardness value (HB)
Standard deviation of HB
Average deviation of HB
Distribution function of HB
Cumulative distribution function of HB
The authors would like to thank ECKA Granules Company for the provision of powder materials.
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