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Title: Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds

Abstract

The phase transformations and mechanical behaviour during welding and subsequent annealing treatment of 2205 duplex stainless steel have been investigated. Detailed microstructural examination showed the presence of higher ferrite amounts in the heat affected zone (HAZ), while higher amounts of austenite were recorded in the centre region of the weld metal. Annealing treatments in the temperature range of 800-1000 deg. C resulted in a precipitation of {sigma} phase and M{sub 23}C{sub 6} chromium carbides at the {gamma}/{delta} interfaces that were found to be preferential precipitation sites. Above 1050 deg. C, the volume fraction of {delta} ferrite increases with annealing temperature. The increase of {delta} ferrite occurs at a faster rate in the HAZ than in the base metal and fusion zone. Optimal mechanical properties and an acceptable ferrite/austenite ratio throughout the weld regions corresponds to annealing at 1050 deg. C. Fractographic examinations showed that the mode of failure changed from quasi-cleavage fracture to dimple rupture with an increase in the annealing temperature from 850 to 1050 deg. C.

Authors:
 [1];  [2]; ;  [1]; ;  [3]
  1. LPMTM-CNRS- Universite Paris 13, 99, av. J.B. Clement, 93430 Villetaneuse (France)
  2. Ecole Nationale Polytechnique, 10, Avenue Hassan Badi, BP 182, El Harrach (Algeria)
  3. Welding and NDT research Centre, B.P 64, Cheraga (Algeria)
Publication Date:
OSTI Identifier:
21062215
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 59; Journal Issue: 4; Other Information: DOI: 10.1016/j.matchar.2007.03.004; PII: S1044-5803(07)00096-4; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; AUSTENITE; CHROMIUM CARBIDES; CLEAVAGE; FERRITE; FRACTURES; HEAT AFFECTED ZONE; INTERFACES; MECHANICAL PROPERTIES; PHASE TRANSFORMATIONS; PRECIPITATION; STAINLESS STEELS; TEMPERATURE RANGE 1000-4000 K; WELDED JOINTS; WELDING

Citation Formats

Badji, Riad, Bouabdallah, Mabrouk, Bacroix, Brigitte, Kahloun, Charlie, Belkessa, Brahim, and Maza, Halim. Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds. United States: N. p., 2008. Web. doi:10.1016/j.matchar.2007.03.004.
Badji, Riad, Bouabdallah, Mabrouk, Bacroix, Brigitte, Kahloun, Charlie, Belkessa, Brahim, & Maza, Halim. Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds. United States. doi:10.1016/j.matchar.2007.03.004.
Badji, Riad, Bouabdallah, Mabrouk, Bacroix, Brigitte, Kahloun, Charlie, Belkessa, Brahim, and Maza, Halim. Tue . "Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds". United States. doi:10.1016/j.matchar.2007.03.004.
@article{osti_21062215,
title = {Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds},
author = {Badji, Riad and Bouabdallah, Mabrouk and Bacroix, Brigitte and Kahloun, Charlie and Belkessa, Brahim and Maza, Halim},
abstractNote = {The phase transformations and mechanical behaviour during welding and subsequent annealing treatment of 2205 duplex stainless steel have been investigated. Detailed microstructural examination showed the presence of higher ferrite amounts in the heat affected zone (HAZ), while higher amounts of austenite were recorded in the centre region of the weld metal. Annealing treatments in the temperature range of 800-1000 deg. C resulted in a precipitation of {sigma} phase and M{sub 23}C{sub 6} chromium carbides at the {gamma}/{delta} interfaces that were found to be preferential precipitation sites. Above 1050 deg. C, the volume fraction of {delta} ferrite increases with annealing temperature. The increase of {delta} ferrite occurs at a faster rate in the HAZ than in the base metal and fusion zone. Optimal mechanical properties and an acceptable ferrite/austenite ratio throughout the weld regions corresponds to annealing at 1050 deg. C. Fractographic examinations showed that the mode of failure changed from quasi-cleavage fracture to dimple rupture with an increase in the annealing temperature from 850 to 1050 deg. C.},
doi = {10.1016/j.matchar.2007.03.004},
journal = {Materials Characterization},
issn = {1044-5803},
number = 4,
volume = 59,
place = {United States},
year = {2008},
month = {4}
}