Progress in Additively Manufactured Gradient Materials: Predicting, Making, and Qualifying

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• Dr Peter C. Collins, Iowa State University
• Friday 13 June 2025, 14:00-15:00
• Oatley 1 Meeting Room, Department of Engineering.

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It is possible to affect a wide variety of gradients into additively manufactured components, including bulk structures and lattice structures. This talk will briefly describe how multiple gradients can be achieved, and some technical advances in the modeling associated with achieving sufficiently precise gradients. However, while demonstrating that it is possible to create precise gradients is a critical initial step towards a future where complex gradients are part of parts and components used in service, it is necessary to develop the predictive tools necessary for design engineers to incorporate spatially varying properties. In this work, we present an effort to predict the processing-materials state-properties-performance relationships in Ti-based gradient structures where both composition and aging temperatures are spatially controlled. Finally, recognizing that qualification (including post-manufacture nondestructive evaluation (NDE)) will be a challenging problem, we present a new concept where we extend the concepts of feasibility diagrams for processing to feasibility diagrams of inspectability.

Peter C. Collins joined the Department of Materials Science and Engineering at Iowa State University in July, 2015. Dr. Pete Collins received his undergraduate degree in Metallurgical Engineering from the University of Missouri-Rolla, and his MS and PhD from The Ohio State University in Materials Science and Engineering. Prior to joining ISU , Dr. Collins served as a faculty member and undergraduate coordinator in the Department of Materials Science and Engineering at the University of North Texas. Dr. Collins has also spent time standing-up a not-for-profit 501-3© manufacturing laboratory, and regularly engages with both industry and the government. His experiences and interests involve the practical and theoretical treatments of microstructure-property relationship, with an extension into composition-microstructure-property relationships derived for complex multi-phase, multi-component engineering alloys. He has extensive experience in participating in large industrial programs, has conducted studies into novel metal matrix composites, and has significant research experience with additive manufacturing techniques, and combinatorial materials science. Dr. Collins is an active member of TMS , past chairman of the ICME committee, member of the Titanium committee, and a member of the Materials Processing and Manufacturing Division. In recent years, Collins and his group have been actively involved in developing and building new types of instrumentation and experiments. These include developing the first 3D SRAS (spatially resolved acoustic spectroscopy) microscope, bicombinatorial techniques, reduced-cost wire-fed metal AM systems, and other techniques aimed at characterizing defects in additive manufactured materials.

This talk is part of the Engineering - Mechanics and Materials Seminar Series series.

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