- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Probing a novel heat source model and adaptive remeshing technique to simulate laser powder bed fusion with experimental validation
摘要： A finite element method based three-dimensional heat transfer model with adaptive remeshing is presented to simulate the building of multiple tracks and layers in laser powder bed fusion of metallic powders with enhanced computational competence. A dimensional analysis is undertaken to define the heat source dimensions as function of laser parameters and properties of alloy powder. The computational model is used to calculate the melt pool cross sections for multiple combinations of laser power and scanning velocities considering multi-track-multi-layer builds of SS316L powder. The computed results are verified extensively with the corresponding experimentally measured ones. The model is utilized further to examine its ability to predict defects such as melt track discontinuity and incomplete fusion between neighboring tracks and layers. Overall, the adaptive remeshing and the proposed heat source expression could significantly enhance the model competence by reducing the computational time and memory while maintaining the accuracy of results in simulating laser powder bed fusion of multiple tracks and layers.
关键词： Selective laser melting (SLM),Pool dimensions,Adaptive remeshing,Laser powder bed fusion (L-PBF),Melt pool defects,SS316L alloy
更新于2025-09-23 15:19:57
-
Effect of substrate material on the molten pool characteristics in selective laser melting of thin wall parts
摘要： Substrate plays an important role in selective laser melting (SLM). In general, the same material substrate is utilized as the powder for SLM. However, there are considerable kinds of aluminum alloy and their physical properties are different. In this work, the effect of three aluminum substrates AlSi10Mg, 6061, and 7050 on the molten pool characteristics was investigated for SLMed AlSi10Mg thin wall parts by experimental and numerical analysis. The thermal behaviors, molten pool characteristics, microstructure, silicon distribution, and microhardness were studied as the deposited layers increase. Results show that these features of the three substrates are different at the first several layers of the thin wall parts then become the same after definite layers. Our results clarify the influence of the substrate materials on the SLM of aluminum thin wall parts, which has important theoretical significance and engineering application.
关键词： Element distribution,Thermal behaviors,Microhardness,Molten pool dimensions,Microstructure,Substrate material
更新于2025-09-12 10:27:22