MSE Seminar: CALPHAD-based ICME for Additive Manufacturing


3:45 pm-5:00 pm
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Rhines Hall, Room 125
549 Gale Lemerand Drive
Gainesville, FL 32611


Join the Department of Materials Science and Engineering for light refreshments and a discussion lead by Dr. Wei song of the University of Pittsburgh.

Based on multiscale physical models and materials genomic databases, the technique of “Materials by Design” enables an accelerated development of cybermaterials by constructing a hierarchical architecture of Integrated Computational Materials Engineering (ICME). The major design toolkit of materials genome is composed of the CALPHAD (Calculation of Phase Diagrams)-based methods, which are indispensable to supply fundamental informatics of materials thermodynamics and diffusion kinetics by coupling both theoretical calculations and experimental measurements. In this seminar, the state-of-the-art CALPHAD approach will be introduced along with the concept of ICME framework for materials design and processing optimization in additive manufacturing. Firstly, a case study on thermal process modeling of melt pool during laser melting will be introduced to illustrate the importance of considering mechanical modeling in the ICME framework. Some recent case studies on Ti alloy and steels demonstrate the importance of improving the alloy composition design for additive manufacturing, and highlights the need of metallurgical design assisted by ICME modeling. Microstructure characterization of additively manufactured alloys indicates that laser processing generates a considerable amount of columnar structure causing undesired anisotropic properties. Therefore, phase-level structure control needs a comprehensive evaluation of thermokinetic influence by both in-situ laser processing and post-heat treatment. The present research indicates that a successful materials design in advanced manufacturing requires synergetic efforts made by scientists and engineers in both mechanical engineering and materials science.


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