Calendar Details

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Monday, January 14

Characterization and Modeling of Materials
Processed by Additive Manufacturing

Sudarsanam Suresh Babu, Ohio State University, Columbus
Advanced Manufacturing Office Seminar
11:00 AM — 12:00 PM, Joint Institute for Computational Sciences (Building 5100), Auditorium (Room 128)
Contact: Craig Blue (blueca@ornl.gov), 865.574.4351

Abstract

Hybrid structures, made with metals, polymers, ceramics, glasses and elastomers in specific geometrical forms, are being considered as innovative solutions for energy applications. In our NSF center, we focus on both solidstate and fusion-based additive processes to make these hybrid structures. In the first part of the talk, an overview of on-going research related to additive manufacturing will be discussed. The importance of interdisciplinary research involving characterization and modeling will be highlighted.

In the second part of the talk, adoption of integrated process modeling to describe microstructure evolution in laser additive manufacturing (LAM) will be presented. Recent work as a part of the CIMJSEA demonstrates that during LAM, irrespective of alloy chemistry, builds do exhibit spatial heterogeneity of hardness. This is related to complex microstructure evolution brought about by repeated heating and cooling of substrate and pre-existing builds. In order to predict these microstructures, efforts are underway to couple the process model (SAMP) developed by Applied Optimization (AO) with overall transformation kinetic models for wide range of materials, including titanium, nickel and iron alloys. Preliminary research shows that by using these models, improved fatigue properties can be achieved by engineering the microstructures.