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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Local mechanical properties of radial friction welded supermartensitic stainless steel pipes

Texto completo
Autor(es):
Della Rovere, C. A. [1] ; Ribeiro, C. R. [1] ; Silva, R. [1] ; Alcantara, N. G. [1] ; Kuri, S. E. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: MATERIALS & DESIGN; v. 56, p. 423-427, APR 2014.
Citações Web of Science: 10
Resumo

In this work, supermartensitic stainless steel pipes were radial friction (RF) welded and their microstructures and local mechanical properties (hardness, fracture toughness and micro-tensile strength) were characterized in the as-welded condition. Defect-free RF welds were produced with a matching consumable ring (CR) under optimized welding conditions. The formation of a fine structure consisting of a mixture of virgin martensite and some stable austenite retained in the CR region was observed. On the other hand, the presence of virgin martensite plus delta-ferrite was found in the microstructures of the heat affected zone (HAZ) and thermo-mechanically affected zone (TMAZ). A ductile fracture was detected in the CR and weld interface regions at -40 degrees C. Moreover, both the CR and weld interface regions showed higher hardness and strength values than those of the base material (overmatching), without presenting significant losses in ductility and fracture toughness, which was attributed directly to the fine transformed microstructure of the weld region. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 12/16113-6 - ELABORAÇÃO, CARACTERIZAÇÃO E RESISTÊNCIA À CORROSÃO DE LIGAS INOXIDÁVEIS Fe-Mn-Si-Cr-Ni COM EFEITO DE MEMÓRIA DE FORMA
Beneficiário:Carlos Alberto Della Rovere
Linha de fomento: Bolsas no Brasil - Pós-Doutorado