Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion
This study provides a quantitative way to tailor the grain structure in laser powder bed fusion (LPBF). Square-bottomed columnar grains (SCGs) were developed with a certain width roughly equal to the hatch spacing. The development of SCGs relied on different distinguishable regions, which were ident...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/165024 |
| _version_ | 1811688990351294464 |
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| author | Hu, Zhiheng Gao, Shubo Tai, Junfei Qu, Shuo Ding, Junhao Song, Xu Fan, Zheng |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Hu, Zhiheng Gao, Shubo Tai, Junfei Qu, Shuo Ding, Junhao Song, Xu Fan, Zheng |
| author_sort | Hu, Zhiheng |
| collection | NTU |
| description | This study provides a quantitative way to tailor the grain structure in laser powder bed fusion (LPBF). Square-bottomed columnar grains (SCGs) were developed with a certain width roughly equal to the hatch spacing. The development of SCGs relied on different distinguishable regions, which were identified based on the differences in microstructural features between the melt-pool side and centreline. High lattice rotation accumulated at the melt-pool centreline, leading to grain boundaries forming at the centreline regions. The ultrasonic attenuation measurements and microhardness tests further validated the controllable properties. The findings indicated a novel approach to customise the material property. |
| first_indexed | 2024-10-01T05:40:59Z |
| format | Journal Article |
| id | ntu-10356/165024 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:40:59Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1650242023-03-08T15:36:52Z Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion Hu, Zhiheng Gao, Shubo Tai, Junfei Qu, Shuo Ding, Junhao Song, Xu Fan, Zheng School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Mechanical engineering Laser Powder Bed Fusion Hatch Spacing This study provides a quantitative way to tailor the grain structure in laser powder bed fusion (LPBF). Square-bottomed columnar grains (SCGs) were developed with a certain width roughly equal to the hatch spacing. The development of SCGs relied on different distinguishable regions, which were identified based on the differences in microstructural features between the melt-pool side and centreline. High lattice rotation accumulated at the melt-pool centreline, leading to grain boundaries forming at the centreline regions. The ultrasonic attenuation measurements and microhardness tests further validated the controllable properties. The findings indicated a novel approach to customise the material property. Agency for Science, Technology and Research (A*STAR) Published version This work was supported by A∗STAR Science and Engineering Research Council [Grant Number A20F9a0045]; Shun Hing Institute of Advanced Engineering, The Chinese University of Hong Kong [Grant Number RNE-p2-21]. 2023-03-08T02:23:20Z 2023-03-08T02:23:20Z 2023 Journal Article Hu, Z., Gao, S., Tai, J., Qu, S., Ding, J., Song, X. & Fan, Z. (2023). Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion. Materials Research Letters, 11(3), 231-238. https://dx.doi.org/10.1080/21663831.2022.2140018 2166-3831 https://hdl.handle.net/10356/165024 10.1080/21663831.2022.2140018 2-s2.0-85141686850 3 11 231 238 en A20F9a0045 Materials Research Letters © 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 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Laser Powder Bed Fusion Hatch Spacing Hu, Zhiheng Gao, Shubo Tai, Junfei Qu, Shuo Ding, Junhao Song, Xu Fan, Zheng Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title | Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title_full | Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title_fullStr | Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title_full_unstemmed | Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title_short | Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion |
| title_sort | columnar grain width control for ss316l via hatch spacing manipulation in laser powder bed fusion |
| topic | Engineering::Mechanical engineering Laser Powder Bed Fusion Hatch Spacing |
| url | https://hdl.handle.net/10356/165024 |
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