Microstructure and corrosion behavior of friction-surfaced 304L austenitic stainless steels

Friction surfacing is a solid-state deposition process that provides microstructural and mechanical property benefits over fusion-based methods as result of the lower heat input hot working. The study examines microstructure corrosion properties for friction-surfaced 304L stainless steel consumable rods on substrates. Microstructural characterization revealed fine-grained with distributed strain-induced martensite high residual compressive stresses. Corrosion studies specimens were carried out by exposure to FeCl3 MgCl2 solutions per ASTM G48 G36 standards, respectively. tests showed friction led shallower smaller pits than uncoated substrate, however, pit number density was higher in specimens. transformations during are beneficial mitigating pitting potentially chloride-induced stress cracking (CISCC).