Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion

Zhiheng Hu; Shubo Gao; Junfei Tai; Shuo Qu; Junhao Ding; Xu Song; Zheng Fan

doi:10.1080/21663831.2022.2140018

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Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion

Original Reports | 更新时间：2026-08-19

- Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion
- Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion
- 材料研究快报（英文） 2023年11卷第3期页码：231-238
- 作者机构：
  
  1. a School of Mechanical and Aerospace Engineering Nanyang Technological University
  2. a School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore Singapore
  3. b Singapore Centre for 3D Printing School of Mechanical and Aerospace Engineering Nanyang Technological University
  4. c Department of Mechanical and Automation Engineering Chinese University of Hong Kong
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2022.2140018
  中图分类号：
- 网络首发：2022-11-03，
  
  纸质出版：2023
- 稿件说明：
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Zhiheng Hu, Shubo Gao, Junfei Tai, 等. Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion[J]. 材料研究快报（英文）, 2023,11(3):231-238.

Zhiheng Hu, Shubo Gao, Junfei Tai, et al. Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion[J]. Materials Research Letters, 2023, 11(3): 231-238.
Zhiheng Hu, Shubo Gao, Junfei Tai, 等. Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion[J]. 材料研究快报（英文）, 2023,11(3):231-238. DOI： 10.1080/21663831.2022.2140018.

Zhiheng Hu, Shubo Gao, Junfei Tai, et al. Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion[J]. Materials Research Letters, 2023, 11(3): 231-238. DOI： 10.1080/21663831.2022.2140018.

摘要

Abstract

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.

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相关机构

h Laboratory of Technology & Strength of Materials (LTSM) Department of Mechanical Engineering & Aeronautics University of Patras

f Materials Science Beamline Paul Scherrer Institute

g Institute of Physics of Materials Czech Academy of Sciences

e Structure and Mechanics of Advanced Materials Paul Scherrer Institute

b Thermomechanical Metallurgy Laboratory (LMTM)—PX Group Chair École Polytechnique Fédérale de Lausanne (EPFL) Neuchâtel Switzerland

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