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Title: Linking process and structure in the friction stir scribe joining of dissimilar materials: A computational approach with experimental support

Abstract

The friction stir welding (FSW) is a popular technique to join dissimilar materials in numerous applications. The solid state nature of the process enables joining materials with strikingly different physical properties. For the welds in lap configuration, an enhancement to this technology is made by introducing a short hard insert, referred to as cutting-scribe, at the bottom of the tool pin. The cutting-scribe induces deformation in the bottom plate which leads to the formation of mechanical interlocks or hook like structures at the interface of two materials. A thermo-mechanically coupled computational model employing coupled Eulerian-Lagrangian approach is developed to quantitatively capture the morphology of these interlocks during the FSW process. The simulations using developed model are validated by the experimental observations.The identified interface morphology coupled with the predicted temperature field from this process-structure model can then be used to estimate the post-weld microstructure and joint strength.

Authors:
ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1491237
Report Number(s):
PNNL-SA-129173
Journal ID: ISSN 1526-6125
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Manufacturing Processes
Additional Journal Information:
Journal Volume: 32; Journal Issue: C; Journal ID: ISSN 1526-6125
Publisher:
Society of Manufacturing Engineers; Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Gupta, Varun, Upadhyay, Piyush, Fifield, Leonard S., Roosendaal, Timothy, Sun, Xin, Nelaturu, Phalgun, and Carlson, Blair. Linking process and structure in the friction stir scribe joining of dissimilar materials: A computational approach with experimental support. United States: N. p., 2018. Web. doi:10.1016/j.jmapro.2018.03.030.
Gupta, Varun, Upadhyay, Piyush, Fifield, Leonard S., Roosendaal, Timothy, Sun, Xin, Nelaturu, Phalgun, & Carlson, Blair. Linking process and structure in the friction stir scribe joining of dissimilar materials: A computational approach with experimental support. United States. doi:10.1016/j.jmapro.2018.03.030.
Gupta, Varun, Upadhyay, Piyush, Fifield, Leonard S., Roosendaal, Timothy, Sun, Xin, Nelaturu, Phalgun, and Carlson, Blair. Sun . "Linking process and structure in the friction stir scribe joining of dissimilar materials: A computational approach with experimental support". United States. doi:10.1016/j.jmapro.2018.03.030.
@article{osti_1491237,
title = {Linking process and structure in the friction stir scribe joining of dissimilar materials: A computational approach with experimental support},
author = {Gupta, Varun and Upadhyay, Piyush and Fifield, Leonard S. and Roosendaal, Timothy and Sun, Xin and Nelaturu, Phalgun and Carlson, Blair},
abstractNote = {The friction stir welding (FSW) is a popular technique to join dissimilar materials in numerous applications. The solid state nature of the process enables joining materials with strikingly different physical properties. For the welds in lap configuration, an enhancement to this technology is made by introducing a short hard insert, referred to as cutting-scribe, at the bottom of the tool pin. The cutting-scribe induces deformation in the bottom plate which leads to the formation of mechanical interlocks or hook like structures at the interface of two materials. A thermo-mechanically coupled computational model employing coupled Eulerian-Lagrangian approach is developed to quantitatively capture the morphology of these interlocks during the FSW process. The simulations using developed model are validated by the experimental observations.The identified interface morphology coupled with the predicted temperature field from this process-structure model can then be used to estimate the post-weld microstructure and joint strength.},
doi = {10.1016/j.jmapro.2018.03.030},
journal = {Journal of Manufacturing Processes},
issn = {1526-6125},
number = C,
volume = 32,
place = {United States},
year = {2018},
month = {4}
}