Challenges in optimizing the resistance to corrosion and wear of amorphous Fe-Cr-Nb-B alloy containing crystalline phases

Autor(es)

Koga, G. Y. ^[1] ; Ferreira, T. ^[2] ; Guo, Y. ^[1] ; Coimbrao, D. D. ^[1] ; Jorge Jr, A. M. ; Kiminami, C. S. ^[3] ; Bolfarini, C. ^[3] ; Botta, W. J. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil

^[3] Jorge Jr, Jr., A. M., Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 555, MAR 1 2021.
• Citações Web of Science: 12

Resumo

The conflicting role of crystalline phase on the corrosion and wear resistance of the glass former Fe66Cr10Nb5B19 alloy was investigated. Amorphous to crystalline structures were produced by amorphous ribbons annealing and solidification of the liquid into a wedge-shaped copper mold. Amorphous and amorphous/nanocrystalline microstructures displayed good balance of properties. Their corrosion resistance remained elevated since alpha-(Fe,Cr) and (Fe,Cr)(2)B crystals were non-percolated within the corrosion-resistant amorphous matrix. Wear resistance was still high because (Fe,Cr)(2)B is even harder than the amorphous matrix. Crystalline microstructures were resistant against wear thanks to the large fraction of (Fe,Cr)(2)B and (Fe,Cr)NbB, both effective to protect the softer alpha-(Fe,Cr) matrix. Their corrosion resistance, however, was severely compromised, given the elemental partitioning to form crystals, with the interfaces more prone to corrode. While amorphous and amorphous/nanocrystalline microstructures presented the best-combined resistance to corrosion and wear, the crystalline microstructures are interesting for load-bearing applications where high corrosion resistance is not required. (AU)

• Processo FAPESP: 17/09237-4 - Design e produção de aços inoxidáveis modificados com boro conformados por spray de elevada resistência a corrosão e ao desgaste
• Beneficiário: Guilherme Yuuki Koga
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
• Beneficiário: Claudio Shyinti Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/22112-8 - Produção e caracterização estrutural, mecânica e eletroquímica de recobrimentos metálicos produzidos por aspersão térmica utilizando ligas amorfizáveis do sistema Fe-Cr-Nb-B.
• Beneficiário: Yaofeng Guo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado