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Title: Residual Stress Measurements of Front Window Welds in a Prototypical Spallation Neutron Source Target Module

Abstract

Spallation Neutron Source (SNS) target modules are fabricated from 316L stainless steel by welding together sections of machined components using electron beam welding. The failure of the tenth operational SNS target (Target 10) at an electron beam weld prompted an investigation into the residual stress remaining in the weld joint after joining to determine if welding procedures for SNS target fabrication produce detrimental residual stresses in or near the welds. Due to an issue with fabrication, the front section of an SNS target was removed from fabrication and made available for residual stress measurements. The residual stresses in an electron beam weld joining the front window and front body of the target prototype was measured at several locations near EBW2 weld between outer window and front body using the VUCLAN instrument. Different stress free d hkl 0 methods were used to calculated the residual strain and residual stress. Furthermore, the results show tensile residual stress up to 350MPa along the weld direction which peaked at weld location.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1459284
Report Number(s):
ORNL/TM-2018/837
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

An, Ke, McClintock, David A., and Frost, Matthew J. Residual Stress Measurements of Front Window Welds in a Prototypical Spallation Neutron Source Target Module. United States: N. p., 2018. Web. doi:10.2172/1459284.
An, Ke, McClintock, David A., & Frost, Matthew J. Residual Stress Measurements of Front Window Welds in a Prototypical Spallation Neutron Source Target Module. United States. doi:10.2172/1459284.
An, Ke, McClintock, David A., and Frost, Matthew J. Thu . "Residual Stress Measurements of Front Window Welds in a Prototypical Spallation Neutron Source Target Module". United States. doi:10.2172/1459284. https://www.osti.gov/servlets/purl/1459284.
@article{osti_1459284,
title = {Residual Stress Measurements of Front Window Welds in a Prototypical Spallation Neutron Source Target Module},
author = {An, Ke and McClintock, David A. and Frost, Matthew J.},
abstractNote = {Spallation Neutron Source (SNS) target modules are fabricated from 316L stainless steel by welding together sections of machined components using electron beam welding. The failure of the tenth operational SNS target (Target 10) at an electron beam weld prompted an investigation into the residual stress remaining in the weld joint after joining to determine if welding procedures for SNS target fabrication produce detrimental residual stresses in or near the welds. Due to an issue with fabrication, the front section of an SNS target was removed from fabrication and made available for residual stress measurements. The residual stresses in an electron beam weld joining the front window and front body of the target prototype was measured at several locations near EBW2 weld between outer window and front body using the VUCLAN instrument. Different stress free dhkl0 methods were used to calculated the residual strain and residual stress. Furthermore, the results show tensile residual stress up to 350MPa along the weld direction which peaked at weld location.},
doi = {10.2172/1459284},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}

Technical Report:

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