Effect of Strain Ageing On Welded or Nonwelded Low Carbon Steel

Abstract

An investigation has been performed on the strain ageing of welded and non-welded specimen of low carbon steel. It was determined that the low carbon steel were susceptible to strain ageing in interstitial solutes. The increase in yield strength, tensile strength and elongation because of strain ageing has been compared between welded and non-welded specimen. At high level of prestrain, the percentage loss in ductility was observed. Increase in the strain-ageing temperature the value of ΔY increased, increase the time of ageing has also got influence on value of ΔY. However the influence of temperature of ageing is much more pronounced than the affect of time of ageing. The change in yield stress due to strain ageing in welded specimen was observed less than the non welded specimen. this increase in yield stress is attributed to the fact that the dislocation density of welded sample is higher than non-welded sample.