Strategy for identification of HCP structure materials: study of Ti-6A1-4V under tensile and compressive load conditions

摘要

This work proposes a new constitutive model that takes into account the asymmetry of Ti-6Al-4V, its microstructural state and its pronounced anisotropy in order to improve the use of this titanium alloy in biomechanics and aeronautics in particular. The choice of the stress directions and their effect on shaping procedures in light of accounting the effect of heat treatment on the behavior of Ti-6Al-4V, hardness and microstructural defects is important. The fracture surfaces of a material specimen subjected to traction/compression is examined using scanning electron microscope. An appropriate choice of the model is necessary through experimental validation. The use of this alloy in the biomechanical field brings into consideration several factors such as different solicitations and uniaxial loads, and tension-compression asymmetry...as well as in the aeronautical field other factors such as material strength and ductility in shaping under certain heat treatment are considered.