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

Journal Article · · Journal of Manufacturing Processes
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  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. General Motors Research and Development, Warren, MI (United States)
We present that 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 welds in lap configuration, an enhancement to this technology is made by introducing a short, hard insert, referred to as a 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-mechanical computational model employing a coupled Eulerian-Lagrangian approach is developed to quantitatively capture the morphology of these interlocks during the FSW process. Simulations using this model are validated by experimental observations. In conclusion, the identified interface morphology coupled with the predicted temperature field from this process–structure model can be used to estimate the post-weld microstructure and joint strength.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725; AC05-76RL01830; EE0007311
OSTI ID:
1435194
Alternate ID(s):
OSTI ID: 1434847
OSTI ID: 1780260
OSTI ID: 1491237
Journal Information:
Journal of Manufacturing Processes, Journal Name: Journal of Manufacturing Processes Journal Issue: C Vol. 32; ISSN 1526-6125
Publisher:
Society of Manufacturing Engineers; ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

A review on friction-based joining of dissimilar aluminum–steel joints journal October 2018
Effect of Tool Design and Process Parameters on Lap Joints Made by Right Angle Friction Stir Welding (RAFSW) journal August 2019

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