Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating
AUTOR(ES)
Cruz, Juliane Ribeiro da, Henke, Sérgio Luiz, d'Oliveira, Ana Sofia Clímaco Monteiro
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
01/08/2016
RESUMO
Abstract Machining procedures of welding deposits are usual and result on cold work hardened surfaces. The cold work effect on cavitation erosion of an austenitic stainless steel surface is assessed. FeCrMnSiB coatings were processed by PTA on AISI 304 plates. Specimens were grouped as the cold work deformed surface (CWHS) and the undeformed polished surface (UPS) specimens. Top surface and transverse section of coatings were analysed for slip lines and hardness changes by light microscopy and Vickers microhardness measurements. Ultrasonic cavitation tests were conducted in accordance to ASTM G32-10. CWHS specimens exhibited slip lines and hardened surfaces while UPS specimens did not show traces of slip lines and had insignificant changes on microhardness. Cold work prior to cavitation indirectly increased the nominal incubation time and reduced the maximum erosion rate. Cold work increases the duration of the acceleration period postponing the onset of the maximum erosion rate and enhancing cavitation resistance.
Documentos Relacionados
- The Influences of Martensitic Transformations on Cavitation-Erosion Damage Initiation and Pitting Resistance of a Lean Austenitic Stainless Steel
- Influence of cold deformation on pitting corrosion resistance of ISO NBR 5832-1 austenitic stainless steel used for orthopedic implants
- Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel
- Effect of niobium in the phase transformation and corrosion resistance of one austenitic-ferritic stainless steel
- Microstructural Transformations in Dissimilar Welds between Austenitic Stainless Steel and Ferritic Stainless Steel