Article
Chemistry, Physical
Feng Xu, Feiyu Xiong, Ming-Jian Li, Yanping Lian
Summary: This study presented a numerical model to investigate the grain growth mechanisms during selective laser melting. The simulation results were in good agreement with experimental data. The findings of this study are significant for optimizing process parameters and controlling the microstructure and mechanical properties of fabricated parts.
Article
Automation & Control Systems
Subin Shrestha, Kevin Chou
Summary: The study examines the effects of laser parameters on single-track geometry and porosity in selective laser melting, showing that an increase in LED results in higher porosity. Metallography reveals a significant increase in melt pool depth with LED increase, indicating a change in melting mode.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Thermodynamics
M'hamed Boutaous, Xin Liu, Dennis A. Siginer, Shihe Xin
Summary: This study developed a comprehensive model to investigate the balling phenomenon and its influencing factors in the Selective Laser Melting process. Simulation results matched well with experimental findings.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Physics, Multidisciplinary
Bing Li, Changyou Li, Hua Chunlei
Summary: A rapid and accurate analytical model for predicting the temperature distribution during keyhole-mode melting in selective laser melting (SLM) is proposed in this study. The model considers the physical phenomena of vapor depression in the molten pool and the interaction between the laser and molten pool. Numerical simulations and experimental data were used to validate the model. With a computation time of 15 s and a prediction error of less than 10%, this model can effectively simulate SLM processes and guide the optimization of process parameters.
Article
Nanoscience & Nanotechnology
J. Karimi, C. Suryanarayana, I Okulov, K. G. Prashanth
Summary: This study investigated the effect of remelting on the microstructure and mechanical properties of Ti6Al4V materials fabricated using selective laser melting. The results showed that the number of remeltings significantly influenced the homogenization of the microstructure and mechanical properties of the materials, with an increase in hardness and ultimate tensile strength but a decrease in ductility observed with a higher number of melting steps.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Chemical
Erlei Li, Zongyan Zhou, Lin Wang, Haopeng Shen, Ruiping Zou, Aibing Yu
Summary: This study employs a validated mathematical model to assess the influence of material properties on the selective laser melting process. The results indicate that the solidification rate and mushy zone constant have a significant impact on the formation of pores and surface defects.
Article
Thermodynamics
Z. Kazemi, M. Soleimani, H. Rokhgireh, A. Nayebi
Summary: In this study, the selective laser melting method (SLM) was simulated by finite element method (FEM) to manufacture a sample of 316 stainless steel. The temperature variation as a function of time and coordinates was obtained, along with the determination of the melting pool and the creation of keyholes at the end of each track. The obtained temperature distribution will be used to characterize the mechanical properties of the manufactured sample.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Murat Akturk, Mehmet Boy, Munish Kumar Gupta, Saad Waqar, Grzegorz M. Krolczyk, Mehmet Erdi Korkmaz
Summary: This study focuses on the material constitutive parameters of the widely used aluminum alloy AlSi10Mg, using SLM technology to manufacture tensile samples and conducting quasi-static and high temperature tensile tests to determine the Johnson-Cook material model. The comparison between numerically simulated tensile results and experimental results shows a maximum error of around 7.5%, demonstrating the accuracy of the established material model.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Sijia Liu, Minsuk Lee, Cheol Choi, Keesam Shin
Summary: In this study, the microstructure, microhardness, and porosity of additive manufactured parts fabricated by selective laser melting are investigated. The porosity of the finished product depends primarily on the energy density used and is more strongly influenced by the scanning speed than the applied laser power. The microstructure exhibits characteristic features attributed to different cooling rates near and far from the laser melting zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jinguo Ge, Xingchen Yan, Yongping Lei, Mansur Ahmed, Peter O'Reilly, Chao Zhang, Rocco Lupoi, Shuo Yin
Summary: This paper investigates the fabrication and properties of Ti6Al4V octahedron lattice structures. The study reveals that vacuum annealing can improve the compressive properties of the samples and enhance their strength. Additionally, the microstructural analysis shows that vacuum annealing leads to the transformation of martensites and the formation of nano-particle precipitation and dislocation.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Artur Leis, Rudolf Weber, Thomas Graf
Summary: The optimal processing window for a highly efficient LPBF process, producing AlSi10Mg components with low porosity, is determined by the ratio P-L/d(b) of incident laser power and the beam diameter on the surface of the bead. This optimum window falls within P-L/d(b)=2000-5200 W/mm, showing process efficiencies of about 7-8%.
Article
Engineering, Manufacturing
Wenjun Ge, Jerry Y. H. Fuh, Suck Joo Na
Summary: A 3D numerical model was developed to simulate the keyhole mode in selective laser melting process, providing detailed simulations of molten pool flow and temperature field. The study results can guide the optimization of manufacturing process parameters.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Qisheng Sun, Ying Liu, Bangjun Li, Zheng Zhang, Bingqian Xu, Songsong Xu, Ying Han, Yanxin Qiao, Jing Han, Guosong Wu, Paul K. Chu
Summary: The study investigates the use of ultrasonic severe surface rolling (USSR) to enhance the corrosion resistance of SLM 316L stainless steel, and finds that the USSR processed samples exhibit significant improvement in corrosion resistance, attributed to the unique gradient structure and chemically homogeneous and high-quality surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Manufacturing
Navid Alinejadian, Pei Wang, Lauri Kollo, Konda Gokuldoss Prashanth
Summary: This study focuses on fabricating dense and near crack-free commercial pure molybdenum samples using selective laser melting (SLM). The use of a double scan strategy helps reduce the formation of solidification cracks.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
B. Rozegari Ghashghay, H. R. Abedi, S. G. Shabestari
Summary: This study investigates the grain refinement in the microstructure of selective laser-melted AlSi10Mg alloy. Randomly oriented grains without preferred micro-texture are observed in the printed microstructure. Columnar grains aligned with the building direction have been formed in the molten pool. Refined equiaxed grains with a size of fewer than 10 mm are formed during solidification or dynamic recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
