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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Microstructure formation and abrasive wear resistance of a boron-modified superduplex stainless steel produced by spray forming

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Author(s):
Soyama, Juliano ; Zepon, Guilherme ; Lopes, Thiago Pama ; Beraldo, Leamar ; Kiminami, Claudio Shyinti ; Botta, Walter Jose ; Bolfarini, Claudemiro
Total Authors: 7
Document type: Journal article
Source: Journal of Materials Research; v. 31, n. 19, p. 2987-2993, OCT 2016.
Web of Science Citations: 5
Abstract

The microstructure formation and wear resistance of a superduplex stainless steel modified with the addition of 3 wt% boron produced by spray forming were investigated. Thermodynamic simulations were used as comparison basis and to explain the experimentally observed microstructure, which was composed by primary M2B-type borides, an austenitic-ferritic matrix, and eutectic M3B2-type borides. The predicted solidification sequence started with the precipitation of primary M2B boride, followed by ferrite/austenite formation and a final eutectic reaction resulting in M3B2 borides. A good correlation with the simulations and final microstructure was found. The abrasive wear resistance was investigated with the dry sand/rubber wheel test and the results indicated an outstanding performance, similar to the cobalt-based Stellite 1016 alloy. The excellent wear resistance resulted from the presence of a significant amount (about 35 vol%) of hard borides homogeneously dispersed in the microstructure, which was effective at increasing hardness and protecting the duplex matrix against abrasion. (AU)

FAPESP's process: 14/27073-0 - Study of stainless steels modified by additions of boron and nitrogen in order to obtain wear resistant materials with low friction coefficient
Grantee:Juliano Soyama
Support type: Scholarships in Brazil - Post-Doctorate