On the Residual Stresses and the Residual Strains in the Heat Treated Plain Carbon Steel Subjected to Tension, Compression or Torsion

Abstract

The quenched and tempered steel, which has been subjected to a load below the yield stress, shows various residual strains after unloading, according to the condition of heat treatment. Especially, in the case it is tempered at 300°C, the residual strain appears in the opposite direction to the applied load. In this report, on the heat treated plain carbon steel subjected to tension, compression or torsion below yield stress, the dimensional change after unloading and the results of measurement of the residual stress in the specimens before loading and after unloading are explained. Also, the new method of measurement of the residual stress, which is suitable to apply to the heat treated cylinder with a small diameter, is explained.