Yield Strength Estimation For Stainless Steel Using Plane Strain Compression Test

Plane strain compression test data for various stainless steel materials (AISI316SS, AISI316L, AISI304 and HCSS316) were analysed with the aim of obtaining the relationship describing the yield strength of each material as a function of the deformation variables (strain rate and temperature). Previous results of hot plane strain compression tests at the temperature range of 900oC to 1200oC and strain rate of 0.001s-1 to100s-1 were used as input data for the FORTRAN program developed. The program generated stress-strain equations, and determined the yield strength due to load and torque for t he different materials. Stress-Strain linear equations for peak stress (σp) and stress to 0.1 or 0.15 strain were obtained to describe all the materials of different compositions while their peak strain ( p ) equations were peculiar to these materials. The yield strength values  obtained when plotted against log10Z started from specific values of Zener-Hollomon parameter (Z) and rose to a peak before decreasing to a specific value (for that due to load and torque)