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:
-
- 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}
}
Web of Science
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