Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163460
Title: Fine grains within narrow temperature range by tuning strain-induced boundary migration dominated recrystallization for selective laser melted Inconel 718
Authors: Chen, Kewei
Li, Hua
Lim, Chong Heng
Jia, Ning
Yan, Weili
Keywords: Engineering::Materials
Issue Date: 2022
Source: Chen, K., Li, H., Lim, C. H., Jia, N. & Yan, W. (2022). Fine grains within narrow temperature range by tuning strain-induced boundary migration dominated recrystallization for selective laser melted Inconel 718. Scripta Materialia, 219, 114882-. https://dx.doi.org/10.1016/j.scriptamat.2022.114882
Journal: Scripta Materialia
Abstract: In this study, fine grains are achieved with weak texture of selective laser melted Inconel 718 (SLM IN718) if annealed within a narrow temperature range (1,070 ∼ 1,090 °C), while abnormal grain growth (AGG) is induced if annealed at temperature higher than that range, resulting in large matrix grains and twins. By a novel quasi-in-situ electron backscatter diffraction (EBSD) method, the recrystallization of SLM IN718 is primarily dominated by strain-induced boundary migration (SIBM) at 1,150 or 1,075 °C via statistical analysis. In particular, AGG at 1,150 °C is attributed to quick consumption of the high-strain regions due to a higher grain boundary (GB) velocity, while fine grains at 1,075 °C attributed to activation of more SIBM grains and uniform growth of these grains due to a slower GB velocity. The techniques proposed in this study can also work well for other SLM face-centered cubic alloys.
URI: https://hdl.handle.net/10356/163460
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2022.114882
Rights: © 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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