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3-D multi-scale modeling of deformation within the weld mushy zone Zareie Rajani, Hamid Reza; Phillion, André
Abstract
The deformation of the fusion weld mushy zone, as a critical factor in solidification cracking, has been simulated by combining a 3D multi-scale model of solidification and microstructure with a deformation model that includes the effects of solidification shrinkage, thermo-mechanical forces and restraining forces. This new model is then used to investigate the role of welding parameters on the deformation rate of micro liquid channels during Gas Tungsten Arc welding of AA6061. It is shown that the internal normal deformation rate due to solidification shrinkage and also the external normal deformation rate caused by external forces are both highest for the micro liquid channels at the center of the mushy zone where solidification cracks usually occur. Furthermore, the model shows that welding travel speed and welding current strongly influence the deformation rate of the weld mushy zone and consequently the solidification cracking susceptibility of the weld. The model can be also used to link micro-scale phenomena with the macro-scale characteristics of solidification cracking during welding.
Item Metadata
Title |
3-D multi-scale modeling of deformation within the weld mushy zone
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Creator | |
Date Issued |
2016-03-15
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Description |
The deformation of the fusion weld mushy zone, as a critical factor in solidification cracking, has
been simulated by combining a 3D multi-scale model of solidification and microstructure with a
deformation model that includes the effects of solidification shrinkage, thermo-mechanical
forces and restraining forces. This new model is then used to investigate the role of welding
parameters on the deformation rate of micro liquid channels during Gas Tungsten Arc welding of
AA6061. It is shown that the internal normal deformation rate due to solidification shrinkage and
also the external normal deformation rate caused by external forces are both highest for the
micro liquid channels at the center of the mushy zone where solidification cracks usually occur.
Furthermore, the model shows that welding travel speed and welding current strongly influence
the deformation rate of the weld mushy zone and consequently the solidification cracking
susceptibility of the weld. The model can be also used to link micro-scale phenomena with the
macro-scale characteristics of solidification cracking during welding.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2018-03-31
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0305858
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URI | |
Affiliation | |
Citation |
Materials & Design, 94, 536-545
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International