To study the effect of variable loading on fatigue properties of heat treated aluminum alloy (6063 T5) / Dennis Angau

The study of the behaviour of materials is quite important now days, it important especially for designer to make decision when selecting the material suitable to be used in their product. To study the materials, researcher must know the properties of the materials in term of yield strength, hardness, toughness and also the effect of the strengthen works. It also further testing must to be done such as hardness test, microstructure study, and the fracture of the failures. A study on the effect of heat treatment to the fatigue behaviour of aluminium alloy (6063 T5) was conducted. The results showed some differences in behaviour of aluminium alloy especially under cyclic loading. Results were explained in term of microstructures and hardness. These results are shown in term of micrograph of fracture surfaces, hardness and S-N curves. The load levels do give some effect on the fatigue properties of aluminium alloy (6063 T5) especially after heat treatment.