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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.)

Local mechanical properties of radial friction welded supermartensitic stainless steel pipes

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Author(s):
Della Rovere, C. A. [1] ; Ribeiro, C. R. [1] ; Silva, R. [1] ; Alcantara, N. G. [1] ; Kuri, S. E. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: MATERIALS & DESIGN; v. 56, p. 423-427, APR 2014.
Web of Science Citations: 10
Abstract

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)

FAPESP's process: 12/16113-6 - ELABORATION, CHARACTERIZATION AND CORROSION RESISTANCE OF SHAPE MEMORY STAINLESS STEELS
Grantee:Carlos Alberto Della Rovere
Support type: Scholarships in Brazil - Post-Doctorate