Effect of heat treatment on the microstructural evolution in weld region of 304L pipeline steel
1LMSM, Departement of Mechanical Engineering University of Biskra Biskra, Algeria
2Departement of Mechanical Engineering University of Biskra Biskra, Algeria
3University Paris-sud 11, UMR8182, ICMMO, Laboratoire de physico-chimie de l’Etat solide Orsay, France
2Departement of Mechanical Engineering University of Biskra Biskra, Algeria
3University Paris-sud 11, UMR8182, ICMMO, Laboratoire de physico-chimie de l’Etat solide Orsay, France
J Ther Eng 2016; 6(2): 1017-1022
Abstract
In this work, the effect of isothermal heat treatments at 300 °C on microstructure evolution after welding by Tungsten Inert Gas (TIG) welding technique of 304L pipeline steel have been studied. Microstructures of the weldments were investigated using scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and hardness measurements. Microstructural evolution in welded joint was identified. Results indicated that the microstructure of fusion zones exhibited dendritic structure. The applied heat treatments affected the microstructure of the welded joint. However some defects have been observed in weld joint.
Keywords: TIG Welding, stainless steel 304L, heat treatments, microstructures
