Influence of the intermediate annealing process on the anisotropic and elastoplastic properties of AHSS sheets

Abstract

This work presents the experimental results of the influence of an annealing process on the anisotropic and
elastoplastic properties of two types of advanced high strength steels (AHSS) sheets. The specimens were fabricated
from Dual-Phase (DP) and a Transformation Induced Plasticity (TRIP) sheets with 0.78 mm and 1.08 mm thick,
respectively. Experiments to determine the elastoplastic properties, anisotropy, and Young’s modulus variation were
conducted. From the experimental results, it can be observed that the annealing process has a significative effect on
the yield stress of the material and on the plateau appearance in the elastoplastic transition zone. Also, the anisotropy
of the sheet is significatively reduced when temperatures of 400 °C and 800 °C are used in the process.