MaterialsMap: A CALPHAD-Based Tool to Design Composition Pathways through feasibility map for Desired Dissimilar Materials, demonstrated with RSW Joining of Ag-Al-Cu
arxiv(2024)
摘要
Assembly of dissimilar metals can be achieved by different methods, for
example, casting, welding, and additive manufacturing (AM). However, undesired
phases formed in liquid-phase assembling processes due to solute segregation
during solidification diminish mechanical and other properties of the processed
parts. In the present work, an open-source software named MaterialsMap, has
been developed based on the CALculation of Phase Diagrams (CALPHAD) approach.
The primary objective of MaterialsMap is to facilitate the design of an optimal
composition pathway for assembling dissimilar alloys with liquid-phases based
on the formation of desired and undesired phases along the pathway. In
MaterialsMap, equilibrium thermodynamic calculations are used to predict
equilibrium phases formed at slow cooling rate, while Scheil-Gulliver
simulations are employed to predict non-equilibrium phases formed during rapid
cooling. By combining these two simulations, MaterialsMap offers a thorough
guide for understanding phase formation in various manufacturing processes,
assisting users in making informed decisions during material selection and
production. As a demonstration of this approach, a compositional pathway was
designed from pure Al to pure Cu through Ag using MaterialsMap. The design was
experimentally verified using resistance spot welding (RSW).
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