Abstract
Though warm working offers several technological advantages, warm working of austenitic stainless steels might lead to intergranular corrosion since the temperature range of warm working coincides with that of sensitization. In the present study, warm working of AISI Type 316 stainless steel (SS) was carried out between 823–1123 K up to 30% strain level, and subjected to intergranular corrosion tests as per ASTM A 262 practices A and E, and electrochemical potentiokinetic reactivation technique. The results indicated that the warm working process employed did not lead to intergranular corrosion. Additionally, after a sensitization aging treatment given to the warm worked specimens, they still showed a reduced tendency to intergranular corrosion as compared to the solution annealed and aged material. Optical and TEM observations showed copious intragranular precipitates suggesting that the growth of such precipitates formed during warm working would have reduced the density and distribution of intergranular carbides resulting in lesser chromium depleted grain boundary regions.
Published Version
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