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Title: Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy

Abstract

Nanostructured ferritic alloys (NFAs) are new generation materials for use in high temperature energy systems, such as nuclear fission or fusion reactors. However, joining these materials is a concern, as their unique microstructure is destroyed by traditional liquid-state welding methods. The microstructural evolution of a friction stir welded 14YWT NFA was investigated by atom probe tomography, before and after a post-weld heat treatment (PWHT) at 1123K. The particle size, number density, elemental composition, and morphology of the titanium-yttrium-oxygenenriched nanoclusters (NCs) in the stir and thermally-affected zones were studied and compared with the base metal. No statistical difference in the size of the NCs was observed in any of these conditions. After the PWHT, increases in the number density and the oxygen enrichment in the NCs were observed. Therefore, these new results provide additional supporting evidence that friction stir welding appears to be a viable joining technique for NFAs, as the microstructural parameters of the NCs are not strongly affected, in contrast to traditional welding techniques.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1286916
Alternate Identifier(s):
OSTI ID: 1396699
Grant/Contract Number:  
AC05-00OR22725; ERKCM52
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 469; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Friction stir weld; Nanostructured ferritic alloys; Atom probe tomography

Citation Formats

Mazumder, Baishakhi, Yu, Xinghua, Edmondson, Philip D., Parish, Chad M., Miller, Michael K, Meyer, H. M., and Feng, Zhili. Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy. United States: N. p., 2015. Web. doi:10.1016/j.jnucmat.2015.11.061.
Mazumder, Baishakhi, Yu, Xinghua, Edmondson, Philip D., Parish, Chad M., Miller, Michael K, Meyer, H. M., & Feng, Zhili. Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy. United States. https://doi.org/10.1016/j.jnucmat.2015.11.061
Mazumder, Baishakhi, Yu, Xinghua, Edmondson, Philip D., Parish, Chad M., Miller, Michael K, Meyer, H. M., and Feng, Zhili. Tue . "Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy". United States. https://doi.org/10.1016/j.jnucmat.2015.11.061. https://www.osti.gov/servlets/purl/1286916.
@article{osti_1286916,
title = {Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy},
author = {Mazumder, Baishakhi and Yu, Xinghua and Edmondson, Philip D. and Parish, Chad M. and Miller, Michael K and Meyer, H. M. and Feng, Zhili},
abstractNote = {Nanostructured ferritic alloys (NFAs) are new generation materials for use in high temperature energy systems, such as nuclear fission or fusion reactors. However, joining these materials is a concern, as their unique microstructure is destroyed by traditional liquid-state welding methods. The microstructural evolution of a friction stir welded 14YWT NFA was investigated by atom probe tomography, before and after a post-weld heat treatment (PWHT) at 1123K. The particle size, number density, elemental composition, and morphology of the titanium-yttrium-oxygenenriched nanoclusters (NCs) in the stir and thermally-affected zones were studied and compared with the base metal. No statistical difference in the size of the NCs was observed in any of these conditions. After the PWHT, increases in the number density and the oxygen enrichment in the NCs were observed. Therefore, these new results provide additional supporting evidence that friction stir welding appears to be a viable joining technique for NFAs, as the microstructural parameters of the NCs are not strongly affected, in contrast to traditional welding techniques.},
doi = {10.1016/j.jnucmat.2015.11.061},
journal = {Journal of Nuclear Materials},
number = ,
volume = 469,
place = {United States},
year = {Tue Dec 08 00:00:00 EST 2015},
month = {Tue Dec 08 00:00:00 EST 2015}
}

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Cited by: 14 works
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Works referenced in this record:

Recent Developments in Irradiation-Resistant Steels
journal, August 2008


Characterization of precipitates in MA/ODS ferritic alloys
journal, June 2006


Response of nanoclusters in a 9Cr ODS steel to 1dpa, 525°C proton irradiation
journal, December 2010


Structural materials for Gen-IV nuclear reactors: Challenges and opportunities
journal, December 2008


Stability of nanoclusters in 14YWT oxide dispersion strengthened steel under heavy ion-irradiation by atom probe tomography
journal, December 2014


Microstructure and mechanical properties of friction stir processed ODS ferritic steels
journal, October 2011


The role of processing route on the microstructure of 14YWT nanostructured ferritic alloy
journal, October 2015


Microstructural evolution in friction stir welding of nanostructured ODS alloys
journal, August 2010


Grain characteristic and texture evolution in friction stir welds of nanostructured oxide dispersion strengthened ferritic steel
journal, November 2011


Study of PM2000 microstructure evolution following FSW process
journal, April 2009


Microstructure and mechanical properties of friction stir welded oxide dispersion strengthened alloy
journal, January 2013


Friction stir welding and processing
journal, August 2005


Effects of friction stir welding and post-weld annealing on nanostructured ferritic alloy
journal, April 2011


Joining of 14YWT and F82H by friction stir welding
journal, November 2013


Phase transformations in yttrium –aluminium oxides in friction stir welded and recrystallised PM2000 alloys
journal, September 2009


Mechanical properties of neutron irradiated nanostructured ferritic alloy 14YWT
journal, April 2009


Improved weldability diagram for pulsed laser welded austenitic stainless steels
journal, February 2003


Stability of Y–Ti–O precipitates in friction stir welded nanostructured ferritic alloys
journal, January 2015


Role of alloying elements in nanostructured ferritic steels
journal, April 2011


Microstructural evolution and mechanical properties of friction stir welded ODS alloy MA754
journal, November 2013


Direct observation of ion-irradiation-induced chemical mixing
journal, November 2011


Radiation response of a 9 chromium oxide dispersion strengthened steel to heavy ion irradiation
journal, March 2008


Controlling diffusion for a self-healing radiation tolerant nanostructured ferritic alloy
journal, July 2015


Response of nanostructured ferritic alloys to high-dose heavy ion irradiation
journal, February 2014


Designing Radiation Resistance in Materials for Fusion Energy
journal, July 2014


Herring-Nabarro Creep Studies on the Self-Diffusion of Iron in the Presence of Solutes
journal, January 1967


Vacancy Mechanism of High Oxygen Solubility and Nucleation of Stable Oxygen-Enriched Clusters in Fe
journal, November 2007


Morphology, structure, and chemistry of nanoclusters in a mechanically alloyed nanostructured ferritic steel
journal, January 2012


Recent advances in friction-stir welding – Process, weldment structure and properties
journal, August 2008


Works referencing / citing this record:

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