Author/Authors :
Ganesh، نويسنده , , P. and Kumar، نويسنده , , A. Vinod and Thinaharan، نويسنده , , C. and Krishna، نويسنده , , Nanda Gopala and George، نويسنده , , R.P. and Parvathavarthini، نويسنده , , N. Satheesha Rai and Balakrishna Kalluraya، نويسنده , , S.K. and Kaul، نويسنده , , Rakesh and Mudali، نويسنده , , U. Kamachi and Kukreja، نويسنده , , L.M.، نويسنده ,
Abstract :
An experimental study is carried out on a novel surface thermo-mechanical treatment involving conventional shot blasting and laser surface treatment, for enhancing inter-granular corrosion resistance of type 304 stainless steel. The modified surface exhibited fine re-crystallized austenite grains. A non-destructive approach of monitoring width of γ(311) diffraction peak through a portable X-ray diffraction was adopted, to determine micro-structural state on the thermo-mechanically treated surface. The results of the study have demonstrated that laser-assisted surface thermo-mechanical treatment of type 304 stainless steel is effective not only for enhancing materialʹs inherent resistance against sensitization and inter-granular corrosion due to its subsequent exposure to susceptible temperature regime but also for reducing inter-granular corrosion susceptibility of pre-sensitized specimens.
Keywords :
Thermo-mechanical treatment , Laser surface treatment , Shot blasting , Intergranular Corrosion , Stainless steel 304 , Sensitization
