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Title: Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion
Authors: Yao, Liming
Xiao, Zhongmin
Hoo, Zhiongsheng
Tang, Chao
Qiao, Jing
Zhang, Yanmei
Keywords: Engineering::Mechanical engineering
Issue Date: 2023
Source: Yao, L., Xiao, Z., Hoo, Z., Tang, C., Qiao, J. & Zhang, Y. (2023). Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion. Materials Research Letters, 11(10), 814-820.
Project: A18B1b0061 
Journal: Materials Research Letters 
Abstract: A multi-physics simulation model has been established to investigate the influence of Laser powder bed fusion parameters on the spatial composition distribution and grain growth mechanism of the single-track printed dissimilar alloys. Our study shows that alloy composition gradient isosurfaces can be used to visualize the spatial distribution of alloy composition for miscible dissimilar alloys. When the melt pool aspect ratio changes from large to small, the grain growth transitions from the temperature gradient mode to composition gradient mode and then to the mixed mode. Our experimental observations show that in extreme cases, the curved grain angle can reach 272°.
ISSN: 2166-3831
DOI: 10.1080/21663831.2023.2250826
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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