Creep Behavior Analysis of Aluminum Alloy 1050

The creep behaviour of materials is an important factor in the design for structures subjected to high temperatures and constant loads. Creep is a sustained plastic deformation that occurs in the time to rupture once a material experiences constant load or stress. This phenomenon is observed in many materials such as metals, ceramics and polymers. Creep test is a process in which sample of any material is applied with a constant load or stress at high temperature and permanant deformation is measured for specified time period. The creep rate is derived based on the strain rate, which is defined as the ratio of the amount of strain achieved by the material to its time. In creep testing, different experimental methods including applying constant load to the specimens (or constant stress) or stepped loading. Material composition, temperature, level of applied stress, and time contribute to creep behavior. Elevated temperature and stress contribute primarily to an increase in the rate of creep. Knowledge of the creep behavior and mechanism in relation to these conditions becomes increasingly important for engineers and designers in order to achieve long-term structural integrity and reliability of materials under high temperature and stress working conditions. In the current study, the creep behavior of A1050-A aluminum alloy was examined via an available creep testing machine. Preparation of Samples: (ASTM D2990-09) The results indicate typical cracking life of such material being 66 min with 2.5 kg load and at 63A degrees Celcius.