Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/168893
Title: Part geometry-driven crystallographic texture control in a 3D-printed austenitic steel – a strategy for near-monocrystalline microstructure generation
Authors: Chandra, Shubham
Tan, Xipeng
Kumar, Punit
Ramamurty, Upadrasta
Keywords: Engineering::Mechanical engineering
Issue Date: 2023
Source: Chandra, S., Tan, X., Kumar, P. & Ramamurty, U. (2023). Part geometry-driven crystallographic texture control in a 3D-printed austenitic steel – a strategy for near-monocrystalline microstructure generation. Scripta Materialia, 226, 115255-. https://dx.doi.org/10.1016/j.scriptamat.2022.115255
Project: A18B1b0061 
MOE (22-4902-A0001) 
Journal: Scripta Materialia 
Abstract: We propose and employ a novel X-shaped geometry to strengthen the 〈001〉 || z crystallographic texture – distinctive of the electron beam powder-bed fusion technique, for a 3D-printed austenitic stainless steel of type 316 L. The prism angles of the X-shaped parts are varied among 60, 90, and 120 degrees (X-60, X-90, and X-120) to investigate the effect it has on the parts’ properties. Strikingly, the strength of the 〈001〉 || z crystallographic texture and columnar grain width with increasing prism angle is seen to follow a ‘bell-curve’ profile which peaks with the X-90 shape. A distinct mechanical response of X-shaped samples is obtained with X-60 samples showing significantly stronger strain-hardening behavior along with cracking concentrated along the grain boundaries between 〈110〉 || z and 〈001〉 || z grains. Molecular dynamics simulations are utilized to rationalize this phenomenon.
URI: https://hdl.handle.net/10356/168893
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2022.115255
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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