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Title: Characterization of Residual Stress as a Function of Friction Stir Welding Parameters in Oxide Dispersion Strengthened (ODS) Steel MA956

Abstract

This article characterizes the residual stresses generated by friction stir welding of oxide dispersion strengthened steel MA956 over a series of welding conditions. A plate of MA956 steel was friction stir welded at three conditions: 500 rpm/25 millimeters per minute (mmpm), 400 rpm/50 mmpm and 400 rpm/100 mmpm. The residual stresses across these welds were measured using both x-ray and neutron diffraction techniques. Longitudinal residual stresses up to eighty percent of the yield strength were observed for the 400 rpm/100 mmpm condition. Increasing the traverse rate while holding the rotational speed fixed increased the residual stress levels in the stir zone and at the stir zone-thermomechanically affected zone interface. The stress profiles displayed the characteristic M shape, and the asymmetry between advancing and retreating stress peaks was limited, occurring mainly on the root side of the weld. The large magnitude of the stresses was maintained throughout the thickness of the plates.

Authors:
 [1];  [1];  [1];  [2];  [2]
  1. Naval Postgraduate School, Monterey, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1215572
Alternate Identifier(s):
OSTI ID: 1250066
Grant/Contract Number:  
AC05-00OR22725; AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 647; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ODS alloy; Friction Stir Welding; Residual Stress

Citation Formats

Brewer, Luke N., Bennett, Martin S., Baker, B. W., Payzant, E. Andrew, and Kolbus, Lindsay M. Characterization of Residual Stress as a Function of Friction Stir Welding Parameters in Oxide Dispersion Strengthened (ODS) Steel MA956. United States: N. p., 2015. Web. doi:10.1016/j.msea.2015.09.020.
Brewer, Luke N., Bennett, Martin S., Baker, B. W., Payzant, E. Andrew, & Kolbus, Lindsay M. Characterization of Residual Stress as a Function of Friction Stir Welding Parameters in Oxide Dispersion Strengthened (ODS) Steel MA956. United States. https://doi.org/10.1016/j.msea.2015.09.020
Brewer, Luke N., Bennett, Martin S., Baker, B. W., Payzant, E. Andrew, and Kolbus, Lindsay M. 2015. "Characterization of Residual Stress as a Function of Friction Stir Welding Parameters in Oxide Dispersion Strengthened (ODS) Steel MA956". United States. https://doi.org/10.1016/j.msea.2015.09.020. https://www.osti.gov/servlets/purl/1215572.
@article{osti_1215572,
title = {Characterization of Residual Stress as a Function of Friction Stir Welding Parameters in Oxide Dispersion Strengthened (ODS) Steel MA956},
author = {Brewer, Luke N. and Bennett, Martin S. and Baker, B. W. and Payzant, E. Andrew and Kolbus, Lindsay M.},
abstractNote = {This article characterizes the residual stresses generated by friction stir welding of oxide dispersion strengthened steel MA956 over a series of welding conditions. A plate of MA956 steel was friction stir welded at three conditions: 500 rpm/25 millimeters per minute (mmpm), 400 rpm/50 mmpm and 400 rpm/100 mmpm. The residual stresses across these welds were measured using both x-ray and neutron diffraction techniques. Longitudinal residual stresses up to eighty percent of the yield strength were observed for the 400 rpm/100 mmpm condition. Increasing the traverse rate while holding the rotational speed fixed increased the residual stress levels in the stir zone and at the stir zone-thermomechanically affected zone interface. The stress profiles displayed the characteristic M shape, and the asymmetry between advancing and retreating stress peaks was limited, occurring mainly on the root side of the weld. The large magnitude of the stresses was maintained throughout the thickness of the plates.},
doi = {10.1016/j.msea.2015.09.020},
url = {https://www.osti.gov/biblio/1215572}, journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
issn = {0921-5093},
number = ,
volume = 647,
place = {United States},
year = {Tue Sep 08 00:00:00 EDT 2015},
month = {Tue Sep 08 00:00:00 EDT 2015}
}

Journal Article:

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Cited by: 25 works
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Works referenced in this record:

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Laser beam welding of an Oxide Dispersion Strengthened super alloy
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Neutron Diffraction Measurement of Residual Stresses in Friction Stir Processed Nanocomposite Surface Layer
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journal, April 2012


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Fatigue initiation behaviour throughout friction stir welded joints in AA2024-T3
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Works referencing / citing this record:

Microstructure and Mechanical Characterization of Friction-Stir-Welded 316L Austenitic Stainless Steels
journal, December 2018


Micro-magnetic analysis of friction stir welded steel plates
journal, May 2018