In-Plane Anisotropy of thermomechanical properties of as-rolled AA2014 T6 aluminum alloy plate

This work investigates the evolution of In-Plan Anisotropy during tensile testing and coefficient of thermal expansion measuring of a hot- rolled plate produced from 2014 aluminum alloy treated to T6 condition. These tests were carried out at 0°, 45°, and 90° with respect to the rolling direction, checked, and realized in order to investigate the effect of orientation on its in-plane anisotropic behavior. Results showed that the tensile orientation has an important effect on elongation and stress hardening capacity as compared to the limited effect on yield strength and ultimate strength of the alloy. The in-plan anisotropy factors of both tensile and yield strengths fluctuate in the range of 2.9% to 3.5%; the same factors vary in the range of 27% to 31% for the stress hardening capacity and elongation. Also, the results showed that the expansion orientation has little effect on the thermal expansion of the as-quenched 2014 aluminum alloy at low temperatures as compared to high temperatures. The in-plan anisotropy factor of coefficient of thermal expansion at low temperature fluctuates in the vicinity of 14%, whereas it reaches 47% at high temperature. The in-plane thermomechanical anisotropy was attributed to the microstructure, texture, and precipitation behavior. It was assessed by means of complementary techniques of investigations such as tensile tests, coefficient of thermal expansion measurements, optical microscopy, differential scanning calorimetry, and X-ray diffraction techniques.