Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion

Liming Yao; Zhongmin Xiao; Zhiongsheng Hoo; Chao Tang; Jing Qiao; Yanmei Zhang

doi:10.1080/21663831.2023.2250826

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Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion

Original Reports | 更新时间：2026-08-19

- Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion
- Materials Research Letters Vol. 11, Issue 10, Pages: 814-820(2023)
- 作者机构：
  
  1. a School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore Singapore
  2. c State Key Laboratory of Robotics and Systems Harbin Institute of Technology
  3. a School of Mechanical and Aerospace Engineering Nanyang Technological University
  4. d Institute of High Performance Computing (IHPC) Agency for Science Technology and Research (A*STAR)
  5. b Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou China
  6. e School of Materials Science and Engineering Harbin Institute of Technology
  7. f College of Aerospace Engineering Chongqing University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2250826
  CLC：
- Online First：01 September 2023，
  
  Published：2023
- 稿件说明：
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Liming Yao, Zhongmin Xiao, Zhiongsheng Hoo, et al. Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion[J]. Materials Research Letters, 2023, 11(10): 814-820.
DOI：

Liming Yao, Zhongmin Xiao, Zhiongsheng Hoo, et al. Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion[J]. Materials Research Letters, 2023, 11(10): 814-820. DOI： 10.1080/21663831.2023.2250826.

摘要

Abstract

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°.

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a School of Materials Engineering Shanxi College of Technology

b School of Materials Science and Engineering Taiyuan University of Science and Technology

c State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University

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