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Phase Field Modeling of Microstructure Formation, DSC Curves, and Thermal Expansion for AgCu Brazing Fillers Under Reactive Air Brazing Conditions
Author(s) -
Apel Markus,
Laschet Gottfried,
Böttger Bernd,
Berger Ralf
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400101
Subject(s) - brazing , materials science , microstructure , differential scanning calorimetry , phase (matter) , composite material , cooling curve , eigenstrain , metallurgy , thermodynamics , alloy , chemistry , physics , residual stress , organic chemistry
We discuss phase field simulations of the microstructure evolution in an Ag–Cu brazing filler for conditions close to reactive air brazing (RAB) under air. The simulations show the basic steps of the phase formation in the brazing filler during solidification and provide calculated DSC curves, which allow a direct comparison between simulation and experiment. It is demonstrated that the consideration of transport processes (mainly oxygen) is necessary for a quantitative interpretation of measured differential scanning calorimetry (DSC) curves. Furthermore, simulations demonstrate the effect of different Cu‐contents on the microstructure and the corresponding DSC curves. Finally, the effective temperature‐dependent thermal expansion including the eigenstrain from the phase transformation is calculated for the two‐phase microstructure.