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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Multi-material Additive Manufacturing: Processing and Heterogeneous Materials Design
Sponsorship
Organizer(s) Hang Yu, Virginia Polytechnic Institute
Steven Boles, The Hong Kong Polytechnic University
Michael Gibson, Desktop Metal
Lonnie Love, Oak Ridge National Laboratory
Scope This symposium will provide a forum for the dissemination and discussion of the state-of-the-art of multi-material additive manufacturing. Using various processes, 3D objects with locally controlled composition, microstructure and properties can be fabricated and designed. Examples include functionally graded parts with designed composition profiles and printed multifunctional assemblies. This capability unlocks a new space for design and fabrication of a wide variety of objects in which the meso-scale materials distribution and the topology an shape of the 3D objects can be simultaneously controlled. In structural and thermal applications, the stress and thermal fields are often highly non-uniform; control of the materials distribution through multi-material additive manufacturing enables locating different properties at different positions for the optimum overall performance of a 3D object. Multi-material additive manufacturing may also enable fabrication of objects with designed internal architectures to implement functionality that was previously difficult to implement.
New challenges arise in multi-material additive manufacturing as-compared to single material processing. In processing, for example, sharp compositional gradients are sometimes desired in design; understanding material incompatibilities across such sharp interfaces, and the degree to which such gradients can be maintained in the end-product is crucial. In design, robust methodologies are needed to determine the optimal materials distribution for given manufacturing constraints and for specific mechanical, thermal, or multi-physics applications. In implementation, the designed gradients must be incorporated into 3D modelling packages so that parts can actually be made. This symposium will serve as a venue for the government, academic, and industrial professionals to share ideas, address fundamental challenges, and define future trends in multi-material additive manufacturing. Both experimental work on multi-material additive manufacturing systems and measurements and theoretical work on computational design and optimization are welcome to provide new physical insights and promote this sub-field of additive manufacturing. All types of materials are of interest, from metals, ceramics, and composites to polymers and bio-materials.
Research areas of particular interests include, but are not limited to:
 Emerging technologies for multi-material additive manufacturing.
 Processing challenges and solutions in multi-material additive manufacturing, e.g. control of the local composition, stress concentrations at interfaces, reactions across adjacent layers, residual stresses and thermal stresses.
 New materials, structures, and functions enabled by multi-material additive manufacturing.
 Design and optimization for materials distribution and manufacturing strategy in multi-material additive manufacturing.
Potential Invited Speakers:
 Jennifer Lewis (Harvard University)
 Wojciech Matusik (MIT)
 John Hart (MIT)
 David Bourell (University of Texas, Austin)
 Shoufeng Yang (University of Southampton, UK)
 Christopher Williams (Virginia Tech)
 Wing Kam Liu (Northwestern University)
 Ryan Dehoff (Oak Ridge National Laboratory)
 Brandon McWilliams (Army Research Laboratory)
 Douglas Hofmann (NASA Jet Propulsion Laboratory)
 David Keicher (Optomec)
 Edward Herderick (GE Corporate)
 Daniel Dikovsky (Stratasys)
 James Guest (Johns Hopkins)

Abstracts Due 07/01/2019
Proceedings Plan Planned: TMS Journal: JOM
PRESENTATIONS APPROVED FOR THIS SYMPOSIUM INCLUDE
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