Investigation of tensile and compressive mechanical properties of typical aerospace alloy materials

Abstract

For typical aerospace alloys, the mechanical properties of TC4 titanium alloy and 7075 aluminum alloy at different loading rates were investigated by uniaxial tension and compression experiments. The fracture microscopic morphologies of the two alloys were compared and analyzed using a scanning electron microscope. In addition, the experiment also combined infrared thermography technology (IRT) to compare and analyze the temperature variation characteristics of TC4 titanium alloy specimens under the same tensile and compressive loading rates. The research results show that the mechanical properties of TC4 titanium alloys are superior to those of 7075 aluminum alloys under the same tensile and compressive loading rates. Constitutive equations considering power-law hardening and tensile loading rate were derived to express the yield flow stress behavior.