Microstructure-Based Modeling of Laser Beam Shaping During Additive Manufacturing

被引：10
作者：
Moore, Robert [1 ]
Orlandi, Giovanni [2 ]
Rodgers, Theron [3 ]
Moser, Daniel [3 ]
Murdoch, Heather [4 ]
Abdeljawad, Fadi [1 ,2 ]
机构：
[1] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA
[2] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA
[3] Sandia Natl Labs, Albuquerque, NM 87185 USA
[4] DEVCOM Army Res Lab, Aberdeen Proving Ground, MD 21005 USA
来源：
JOM | 2024年 / 76卷 / 03期
基金：
美国国家科学基金会;
关键词：
POWDER-BED FUSION; ENERGY DENSITY; PROCESS PARAMETERS; MECHANICAL-PROPERTIES; MELTING PROCESS; HEAT-TRANSFER; FLUID-FLOW; SIMULATION; ALLOY; GEOMETRY;
D O I：
10.1007/s11837-023-06363-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recent experimental studies suggest the use of spatially extended laser beam profiles as a strategy to control the melt pool during laser powder bed fusion (LPBF) additive manufacturing. However, linkages connecting laser beam profiles to thermal fields and resultant microstructures have not been established. Herein, we employ a coupled thermal transport-Monte Carlo model to predict the evolution of temperature fields and grain microstructures during LPBF using Gaussian, ring, and Bessel beam profiles. Simulation results reveal that the ring-shaped beam yields lower temperatures compared with the Gaussian beam. Owing to the small melt pool size when using the Bessel beam, the grains are smaller in size and more equiaxed compared to those using the Gaussian and ring beams. Our approach provides future avenues to predict the impact of laser beam shaping on microstructure development during LPBF.
引用
收藏
页码：1726 / 1736
页数：11
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