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Title: Mechanical performance of neutron-irradiated dissimilar transition joints of aluminum alloy 6061-T6 and 304L stainless steel

Bimetallic transition joints using aluminum alloy 6061-T6 and stainless steel 304 L are useful in providing reliable stainless steel welds on nuclear components at temperatures below 200 °C, while maintaining the attractive radiation tolerance of the aluminum alloy. The mechanical performance of inertia welded Al6061-T6:304LSS transition joints was evaluated after neutron irradiation up to 3.45 dpa at 100 °C (maximum) in the High Flux Isotope Reactor to determine the viability of using these transition joints for nuclear and reactor applications. Neutron radiation produced moderate hardening (Δσ y≈ MPa) with limited change in ductility. Tensile specimens were produced from multiple transition joints and no batch-to-batch variation was found. Finally, tensile responses were found to align with typical responses of wrought Al6061-T6, indicating that the behavior of the joints was dictated by the Al6061-T6 section of the joint.
Authors:
ORCiD logo [1] ;  [1] ; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 508; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Weld; Bi-metallic transition; 6061; Radiation tolerance
OSTI Identifier:
1458366

Howard, Richard H., Gallagher, Ryan C., and Field, Kevin G.. Mechanical performance of neutron-irradiated dissimilar transition joints of aluminum alloy 6061-T6 and 304L stainless steel. United States: N. p., Web. doi:10.1016/j.jnucmat.2018.05.070.
Howard, Richard H., Gallagher, Ryan C., & Field, Kevin G.. Mechanical performance of neutron-irradiated dissimilar transition joints of aluminum alloy 6061-T6 and 304L stainless steel. United States. doi:10.1016/j.jnucmat.2018.05.070.
Howard, Richard H., Gallagher, Ryan C., and Field, Kevin G.. 2018. "Mechanical performance of neutron-irradiated dissimilar transition joints of aluminum alloy 6061-T6 and 304L stainless steel". United States. doi:10.1016/j.jnucmat.2018.05.070.
@article{osti_1458366,
title = {Mechanical performance of neutron-irradiated dissimilar transition joints of aluminum alloy 6061-T6 and 304L stainless steel},
author = {Howard, Richard H. and Gallagher, Ryan C. and Field, Kevin G.},
abstractNote = {Bimetallic transition joints using aluminum alloy 6061-T6 and stainless steel 304 L are useful in providing reliable stainless steel welds on nuclear components at temperatures below 200 °C, while maintaining the attractive radiation tolerance of the aluminum alloy. The mechanical performance of inertia welded Al6061-T6:304LSS transition joints was evaluated after neutron irradiation up to 3.45 dpa at 100 °C (maximum) in the High Flux Isotope Reactor to determine the viability of using these transition joints for nuclear and reactor applications. Neutron radiation produced moderate hardening (Δσy≈ MPa) with limited change in ductility. Tensile specimens were produced from multiple transition joints and no batch-to-batch variation was found. Finally, tensile responses were found to align with typical responses of wrought Al6061-T6, indicating that the behavior of the joints was dictated by the Al6061-T6 section of the joint.},
doi = {10.1016/j.jnucmat.2018.05.070},
journal = {Journal of Nuclear Materials},
number = C,
volume = 508,
place = {United States},
year = {2018},
month = {9}
}