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Title: Directed energy deposition of metals: processing, microstructures, and mechanical properties
Authors: Li, Shihao
Kumar, Punit
Chandra, Shubham
Ramamurty, Upadrasta
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Li, S., Kumar, P., Chandra, S. & Ramamurty, U. (2022). Directed energy deposition of metals: processing, microstructures, and mechanical properties. International Materials Reviews, 1-43.
Project: A18B1b0061 
Journal: International Materials Reviews
Abstract: Amongst the many additive manufacturing (AM) techniques, directed energy deposition (DED) is a prominent one, which can also be used for the repair of damaged components. In this paper, we provide an overview on it, with emphasis on the typical microstructures of DED alloys and discuss the processing-microstructure-mechanical property correlations. Comparison is made with those manufactured using the conventional techniques and those obtained with laser beam powder bed fusion (LB-PBF). The characteristic solidification rates and thermal histories in DED result in distinct micro- and meso-structural features and mechanical performance, which are succinctly summarized. The potential of DED for manufacturing graded materials and for component repair is elaborated while highlighting the key-associated challenges and possible solutions. Modelling and simulation studies that facilitate an in-depth understanding of the DED technique are summarized. Finally, some critical issues and research directions that would help develop DED further and extend its application potential are identified.
ISSN: 0950-6608
DOI: 10.1080/09506608.2022.2097411
Schools: School of Mechanical and Aerospace Engineering 
Organisations: Institute of Materials Research and Engineering, A*STAR
Rights: © 2022 Institute of Materials, Minerals and Mining and ASM International. Published by Taylor & Francis on behalf of the Institute and ASM International. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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