skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments

Abstract

Ferrite ({delta})/austenite ({gamma}) transformations in the heat affected zone (HAZ) of a gas tungsten arc (GTA) weld in 2205 duplex stainless steel are observed in real-time using spatially resolved X-ray diffraction (SRXRD) with high intensity synchrotron radiation. A map showing the locations of the {delta} and {gamma} phases with respect to the calculated weld pool dimensions has been constructed from a series of SRXRD scans. Regions of liquid, completely transformed {gamma}, a combination of partially transformed {gamma} with untransformed {delta}, and untransformed {delta}+{gamma} are identified. Analysis of each SRXRD pattern provides a semi-quantitative definition of both the {delta}/{gamma} phase balance and the extent of annealing which are mapped for the first time with respect to the calculated weld pool size and shape. A combination of these analyses provides a unique real-time description of the progression of phase transformations in the HAZ. Using these real-time observations, important kinetic information about the transformations occurring in duplex stainless steels during heating and cooling cycles typical of welding can be determined.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15005319
Report Number(s):
UCRL-JC-142147
TRN: US200322%%276
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: International Conference on Joining of Advanced and Specialty Materials IV 2001 ASM Materials Conference and Exposition, Indianapolis, IN (US), 11/05/2001--11/08/2001; Other Information: PBD: 15 Aug 2001
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; FERRITE; HEAT AFFECTED ZONE; PHASE TRANSFORMATIONS; STAINLESS STEELS; WELDED JOINTS; X-RAY DIFFRACTION; AUSTENITE

Citation Formats

Palmer, T A, Elmer, J W, and Wong, J. In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments. United States: N. p., 2001. Web.
Palmer, T A, Elmer, J W, & Wong, J. In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments. United States.
Palmer, T A, Elmer, J W, and Wong, J. Wed . "In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments". United States. https://www.osti.gov/servlets/purl/15005319.
@article{osti_15005319,
title = {In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments},
author = {Palmer, T A and Elmer, J W and Wong, J},
abstractNote = {Ferrite ({delta})/austenite ({gamma}) transformations in the heat affected zone (HAZ) of a gas tungsten arc (GTA) weld in 2205 duplex stainless steel are observed in real-time using spatially resolved X-ray diffraction (SRXRD) with high intensity synchrotron radiation. A map showing the locations of the {delta} and {gamma} phases with respect to the calculated weld pool dimensions has been constructed from a series of SRXRD scans. Regions of liquid, completely transformed {gamma}, a combination of partially transformed {gamma} with untransformed {delta}, and untransformed {delta}+{gamma} are identified. Analysis of each SRXRD pattern provides a semi-quantitative definition of both the {delta}/{gamma} phase balance and the extent of annealing which are mapped for the first time with respect to the calculated weld pool size and shape. A combination of these analyses provides a unique real-time description of the progression of phase transformations in the HAZ. Using these real-time observations, important kinetic information about the transformations occurring in duplex stainless steels during heating and cooling cycles typical of welding can be determined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {8}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: