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Type: Artigo de evento
Title: Cavitation Erosion Resistance Improvement Of A Multipass Friction Stir Processed Uns S32205 Duplex Stainless Steel
Author: Velasquez E.
Hoyos E.
Santos T.F.A.
Ramirez A.J.
Lopez D.M.
Abstract: This paper investigates the behavior of a UNS S32205 duplex stainless steel rolled and annealed that has been friction stir processed by a multipass and overlap series of four beads. The cavitation erosion resistance of the samples was improved by this process when comparing incubation times, wear rates and surface roughness on nugget zones and the as received material. The processed material (PM) was obtained in a dedicated TTI FSW equipment with 200 rpm and 100 mm/min and the cavitation erosion tests were done in a vibratory apparatus according to ASTM G32 standard. Roughness measurements proved to be extremely useful to indirectly determine the stages of the cavitation erosion process. The PM improved its cavitation resistance by having a 200% longer incubation period and a 120% reduction in its maximum erosion rate comparing to the as received base material (BM). Furthermore, the PM had a reduction in the cumulative mass loss of 74% compared with the BM after 10 hours of cavitation erosion (CE) testing. This improvement in the material response against CE seems to be related the recrystallization and refinement of the microstructure and it also seems to be related to the welding sequences employed. Copyright © 2013 ASM International® All rights reserved.
Rights: fechado
Identifier DOI: 
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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