Abstract

The fatigue is one of the major reasons for fracture of materials. Aluminum 7204 AA alloy with various heat treatments and (2.0) wt % of SiC nanoparticles were prepared by stir-casting method under rotating bending loading with ratio of stress (R= -1). The composite was strengthened by SiC particles size of) 10 (nanometre. The fatigue strength and life were obtained experimentally by the family of S-N curves for different heat treatments. The endurance limits (107cycles) for 7204 AA/ 2.0wt% SiC nano-composite fatigue strength as related to untreated nanocomposite was enhanced by 72 and 78.5% for T4 and T6, respectively.The improvement of fatigue properties is due to better spreading of SiC nanoparticles and increased porosity.

Highlights

  • IntroductionAluminium metal is a white to sliver metal whicrepresents about 8% of the earth's crust

  • Aluminium metal is a white to sliver metal whicrepresents about 8% of the earth's crust. It is of very light weight, its specific weight is 2.7 gr/cm3 which is equivalent to one third of iron

  • The basic elements that are added to aluminium to form the alloy are : Copper, Magnesium, Manganese, Silicon and Zinc [1,2,3].When heat-treatable aluminium alloys were endangered to aging process the insistence of the enunciation to release its crystal structure and raising the mechanical properties

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Summary

Introduction

Aluminium metal is a white to sliver metal whicrepresents about 8% of the earth's crust. It is of very light weight, its specific weight is 2.7 gr/cm which is equivalent to one third of iron. Its resistance to tensile is no more than 290 N / mm, which is why it is used in alloy for most of its applications. The basic elements that are added to aluminium to form the alloy are : Copper, Magnesium , Manganese, Silicon and Zinc [1,2,3].When heat-treatable aluminium alloys were endangered to aging process the insistence of the enunciation to release its crystal structure and raising the mechanical properties. Aging of the aluminum alloys bed begins to kicking areas Guinier

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