Elevated temperature axisymmetric uniaxial compression of AA7075 aluminum alloy

An experimental study was conducted to characterize the room and elevated temperature uniaxial compressive deformation behavior of AA7075-T6 and O-temper plate materials. The experiments consisted of testing cylindrical specimens prepared from a rolled and heat-treated plate stock of AA7075 alloy. The tests were conducted in the lower range of elevated temperatures up to 300 °C, at several different test speeds, in rolling and transverse orientations and under isothermal test conditions. The test results were analyzed in terms of true stress-strain response of the two tempers under the above experimental conditions. The deformed test specimens were also observed for resulting surface features and deformed microstructures under the above experimental conditions. The experimental results collectively provide a broad-based understanding of the effect of temperature, strain rate and material anisotropy on material flow characteristics, deformed shapes of cylinders specimens, and the nature of fracture.