دراسة خواص الزحف للمواد المتراكبھ ذات أساس (Al-Mg-Si)‎ مقواة بدقائق من كربيد السليكون

الملخص EN

The aim of this work is to study the deformation behavior of (Al-Mg- Si) alloy reinforced with silicon carbide at elevated temperature under creep.

In this research both matrix-alloy and composite material were prepared using stir-cast technique.

The cast specimens were deformed using rolling process and then heat treatment was done for both matrix alloy and composite material Creep test were done at (١١٠،٢٤٠،٣٢٠) ºC used stresses (٩,٧, ١٩,٤) MPa for master alloy and stresses (٣٨,٤, ٥٧,٧) MPa for composite material.

The composite material reveals lower steady state creep rate than matrix alloy especial at low temperature so it is possible to conclude that composite material has better creep resistance than matrix alloy.

Scanning electron microscope result of fracture section showed that void are formed near silicon carbide and near second phase which indicates that the failure in composite material began by forming voids which connect together to form cracks which expended leading to failure.