Cold Rolling Effect on the Microstructure and Pitting Resistance of the NBR ISO 5832-1 Austenitic Stainless Steel

Autor(es)

Ramirez, Alexander Hincapie ^[1] ; Ramirez, Cristiaann Hincapie ^[1] ; Costa, Isolda ^[1]

Afiliação do(s) autor(es)

^[1] Ctr Ciencia & Tecnol Mat, IPEN CNEN SP, Inst Pesquisas Energet & Nucleares, BR-05508000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Electrochemical Science; v. 8, n. 12, p. 12801-12815, DEC 2013.
• Citações Web of Science: 6

Resumo

The aim of this work is to assess the influence of cold rolling on the microstructure and pitting resistance of the NBR ISO 5832-1 austenitic stainless steel. Samples of this stainless steel either with deformation, corresponding to 30%, 50% and 70% of reduction in thickness induced by cold rolling, or without deformation (as received), were characterized regarding their microstructure to investigate the metallurgical effects created during the deformation process. The results showed that certain levels of cold rolling (30% and 50%) decreased the corrosion resistance of the stainless steel by causing inclusions fragmentation and voids at the matrix-inclusion interface, whereas unexpectedly, high levels of cold deformation (70%) resulted in improved localized corrosion resistance. Surface observation showed that for this level of deformation, the voids created by fragmentation and the matrix-inclusion interface were shielded with matrix material. (AU)

• Processo FAPESP: 12/50187-7 - Investigação do efeito da deformação na resistência a corrosão associada a fadiga do aço inoxidável austenítico NBR ISO 5832 para uso biomédico
• Beneficiário: Isolda Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular