Controlling the solidification process parameters of direct energy deposition additive manufacturing considering laser and powder properties

Yao, X.X.; Ge, P.; Li, J.Y.; Wang, Y.F.; Li, T.; Liu, Wei Wei; Zhang, Zhao

doi:10.1016/j.commatsci.2020.109788

Cited by 45 publications

(11 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon can be also observed in laser additive manufacturing. [64][65][66] When the fifth layer is added, the average grain sizes in SZ on different layers calculated by the MC model are shown in Figure 14 determined by both process temperature and subsequent heated time. A larger average grain size is observed in SZ on bottom layer.…”

Section: Resultsmentioning

confidence: 99%

The simulation of microstructural evolutions in friction stir additive manufacturing

Zhang

Zhou

Tan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Both recrystallization and solid state phase transformation take key role for the determination of final mechanical properties in friction stir additive manufacturing (FSAM) of titanium alloy. Monte Carlo model is developed to simulate the microstructural changes and a two scale strategy is used to simulate both the recrystallization and the solid state phase transformation in FSAM of duplex titanium alloy. Results indicate that the selection of the building direction can lead to different temperature variations in FSAM due to the different heat accumulations. Lower temperature leads to lower cooling rate in FSAM. This is the reason that the volume fraction of α phase is decreased when the process temperature is decreased. Higher temperature leads to the formation of bigger grains when the rotating speed is increased or the transverse speed is decreased.

show abstract

Section: Resultsmentioning

confidence: 99%

The simulation of microstructural evolutions in friction stir additive manufacturing

Zhang

Zhou

Tan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…The obtained experimental data about the temperature and the residual distortio were then used in the validation of the numerical simulation. The chemical compositio of the Ti-6Al-4V particles is listed in Table 1 [28] and the manufacturing parameters in th experiment are listed in Table 2. obtained.…”

Section: Experiments and Materialsmentioning

confidence: 99%

“…The obtained experimental data about the temperature and the residual distor were then used in the validation of the numerical simulation. The chemical composi of the Ti-6Al-4V particles is listed in Table 1 [28] and the manufacturing parameters in experiment are listed in Table 2. The obtained experimental data about the temperature and the residual distortion were then used in the validation of the numerical simulation.…”

Section: Experiments and Materialsmentioning

confidence: 99%

Numerical Studies of the Effects of the Substrate Structure on the Residual Stress in Laser Directed Energy Additive Manufacturing of Thin-Walled Products

Jing

Zhang

et al. 2022

Metals

View full text Add to dashboard Cite

A new method of controlling the residual stress in laser directed energy deposition additive manufacturing (DED AM) products proposed based on constraints used in manufacturing and the substrate design. The simulation results of the residual stress, which were validated with the experimental measured data, showed that weaker constraints on the substrate could greatly decrease the residual stress in the laser DED AM products. In addition, by designing local reduced thickness regions into the substrate, such as long strip holes or support legs, the residual stress in DED AM products could be further decreased. In this study, when long strip holes were designed in the substrate, the tensile residual stress was decreased by 28%. An even smaller amount of residual stress was achieved when the design structure was changed to support legs. The tensile residual stress decreased by more than 30%. The fewer support legs, the smaller the residual stress. The residual stress in DED AM products could be well-controlled by design, while the stiffness can be weakened with fewer constraints.

show abstract

“…Many scholars have studied the impact of scanning patterns on microstructure and mechanical properties in LBAM; their findings clearly state that the scanning pattern has a significant effect on microstructure and mechanical properties of LBAM fabricated components. 15,[103][104][105][106][107] So, to control its microstructures and mechanical properties, it is essential to study the differences in structures and properties of LSF structures or components deposited with different laser beam scanning paths. Figure 7 shows the microstructures of LSF Inconel 718 samples after heat treatment with varying directions of scanning.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

“…2 DED-AM machine: (a) semi-conductor laser generator, (b) six-axis robot arm with a coaxial cladding head, and (c) powder feeder with carrying gas. 15 In the LAM process, another critical issue is the generation and realization of the scanning path planning during the process. The scan path plays a vital role in the LAM process, so it has always been the focus and difficulty of research.…”

Section: Introductionmentioning

confidence: 99%

Review on scanning pattern evaluation in laser-based additive manufacturing

et al. 2021

View full text Add to dashboard Cite

Laser-based additive manufacturing (LBAM) is a group of advanced manufacturing processes used to produce metal components and functionally graded products. Production in LBAM is either limited to the formation of thin or thick coatings on a substrate by laser metal deposition or the production of a fully functional metallic product by selective laser melting. In every case, LBAM fabricated components require optimization for the process parameters to avoid defects, such as porosity, crack holes, thermal deformation, and mechanical strength. As a key link in the laser additive manufacturing (LAM) process, laser scanning path planning is an effective strategy for balancing the temperature field of the formed part, avoiding stress concentration, and preventing deformation and cracking. Efficient, accurate, and reasonable planning of the laser scanning path is of great significance for improving the processing efficiency of the process data, prolonging the life of the laser scanning system, and improving the forming quality of the specimen. Through many studies, it was found that the scanning pattern of the lasers has a significant impact on the mechanical properties and deformations caused by a thermal mismatch during the process. Therefore, it is essential to have indepth knowledge about path planning in LBAM. Our review mainly focuses on the influence of scanning patterns on deformation, temperature, and mechanical properties in LBAM. Finally, our paper discusses the current study limitations and some future studies in LAM technology.

show abstract

Controlling the solidification process parameters of direct energy deposition additive manufacturing considering laser and powder properties

Cited by 45 publications

References 39 publications

The simulation of microstructural evolutions in friction stir additive manufacturing

The simulation of microstructural evolutions in friction stir additive manufacturing

Numerical Studies of the Effects of the Substrate Structure on the Residual Stress in Laser Directed Energy Additive Manufacturing of Thin-Walled Products

Review on scanning pattern evaluation in laser-based additive manufacturing

Contact Info

Product

Resources

About