Abstract

Selective Laser Melting (SLM) is an additive manufacturing (AM) technique that uses a laser to locally fuse material in a metal-powder bed. The process is performed in layers enabling significant geometric freedom over traditional manufacturing techniques. During the deposition process, the metal is locally melted and rapidly self-quenched, leading to rapid solidification with well-defined melt-pool boundaries. Analogies are often drawn to the microstructure created in welding, albeit extending to the entire part. The SLM process parameters are optimized to produce near full density metal parts. The process parameters can also be adjusted to produce local regions that are of unmelted or partially melted powders. The ability to tailor the density (and corresponding modulus, yield strength, and ductility) continuously on a volumetric basis, has significant potential to engineer effective properties. This paper reports on an experimental study of AM metal components subjected to dynamic loading by detonating an explosive in intimate contact with the material. The crystallographic structural behavior of the parts is characterized before and after explosive loading in an explosive compaction test. The findings will aid in designing AM components for explosively loaded systems.

Department(s)

Mechanical and Aerospace Engineering

Second Department

Mining Engineering

International Standard Book Number (ISBN)

978-073544000-5

International Standard Serial Number (ISSN)

0094-243X; 1551-7616

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2020 American Institute of Physics (AIP), All rights reserved.

Publication Date

02 Nov 2020

Available for download on Tuesday, November 02, 2021

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