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Accession Number DE13-1104763
Title Predictive Modeling of Reactive Wetting and Metal Joining.
Publication Date Sep 2013
Media Count 44p
Personal Author F. B. van Swol
Abstract The performance, reproducibility and reliability of metal joints are complex functions of the detailed history of physical processes involved in their creation. Prediction and control of these processes constitutes an intrinsically challenging multi-physics problem involving heating and melting a metal alloy and reactive wetting. Understanding this process requires coupling strong molecularscale chemistry at the interface with microscopic (diffusion) and macroscopic mass transport (flow) inside the liquid followed by subsequent cooling and solidification of the new metal mixture. The final joint displays compositional heterogeneity and its resulting microstructure largely determines the success or failure of the entire component. At present there exists no computational tool at Sandia that can predict the formation and success of a braze joint, as current capabilities lack the ability to capture surface/interface reactions and their effect on interface properties. This situation precludes us from implementing a proactive strategy to deal with joining problems. Here, we describe what is needed to arrive at a predictive modeling and simulation capability for multicomponent metals with complicated phase diagrams for melting and solidification, incorporating dissolutive and composition-dependent wetting.
Keywords Alloys
Chemical composition
Cooling
Heating
Melting
Metal joints
Reactive wetting
Simulation
Solidification
Surface properties


 
Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 71 - Materials Sciences
41F - Joining
94G - Manufacturing Processes & Materials Handling
Corporate Author Sandia National Labs., Livermore, CA.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1411
Contract Number N/A

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