|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Small Features and Microstructures in 3D Printed Heat Exchangers
||Samikshya Subedi, Erfan Rasouli , Eric Truong , Vinod Narayanan , Anthony Rollett
|On-Site Speaker (Planned)
Work is described that is focused on building small heat exchangers in IN718 for use with supercritical CO2. Conventional design is based on diffusion bonding whereas 3D printing allows considerably more freedom of design. The constraints and advantages of additive forming in a laser based powder bed machine are described, as they influence the changes in design that have been implemented. Residual stress is significant, for example. The current limits of resolution are described in terms of the smallest feature that can be built such as thin columns or tubes. The microstructures exhibit irregular grain shapes, low densities of annealing twins and substantial orientation gradients. Overall it is already clear that additive printing of small heat exchangers is a viable forming route.
||Planned: Supplemental Proceedings volume