Advances in Ultrasonic-Assisted Directed Energy Deposition (DED) for Metal Additive Manufacturing

Zhang, Wenjun; Xu, Chunguang; Li, Cencheng; Wu, Sha

doi:10.3390/cryst14020114

Cited by 5 publications

(2 citation statements)

References 116 publications

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“…These voids were mainly elongated along the building direction and located in the bottom area. They were thus attributed to the formation of hot cracks due to high stresses [44]. The formation of these cracks is in agreement with the findings of Huang et al [45] and Lim et al [46], which showed the tendency of the stainless steel to form cracks, especially at the edge of the sample and when high laser power values are used [46].…”

Section: Effect Of Laser Powersupporting

confidence: 89%

Evaluation of Porosity in AISI 316L Samples Processed by Laser Powder Directed Energy Deposition

Salmi,

Piscopo,

Pilagatti

et al. 2024

JMMP

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Directed energy deposition-laser beam/powder (DED-LB/Powder) is an additive manufacturing process that is gaining popularity in the manufacturing industry due to its numerous advantages, particularly in repairing operations. However, its application is often limited to case studies due to some critical issues that need to be addressed, such as the degree of internal porosity. This paper investigates the effect of the most relevant process parameters of the DED-LB/Powder process on the level and distribution of porosity. Results indicate that, among the process parameters examined, porosity is less affected by travel speed and more influenced by powder mass flow rate and laser power. Additionally, a three-dimensional finite element transient model was introduced, which was able to predict the development and location of lack-of-fusion pores along the building direction.

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Section: Effect Of Laser Powersupporting

confidence: 89%

Evaluation of Porosity in AISI 316L Samples Processed by Laser Powder Directed Energy Deposition

Salmi,

Piscopo,

Pilagatti

et al. 2024

JMMP

View full text Add to dashboard Cite

show abstract

“…These voids were mainly elongated along the building direction and located in the bottom area. They were thus attributed to the formation of hot cracks due to high stresses [38]. The formation of these cracks is in agreement with the findings of Huang et al [39] and Lim et al [40] which showed the tendency of the stainless steel to form cracks, especially in the edge of the sample and when high laser power values are used [40].…”

Section: Effect Of Laser Powersupporting

confidence: 89%

Evaluation of Porosity in AISI 316L Samples Processed by Laser-Powder Directed Energy Deposition

Salmi,

Piscopo,

Atzeni

et al. 2024

Preprint

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Laser-Powder Directed Energy Deposition (DED-LB/Powder) is an additive manufacturing process that is gaining popularity in the manufacturing industry due to its numerous advantages, particularly in repairing operations. However, its application is often limited to case studies due to some critical issues that need to be addressed, such as the degree of internal porosity. This paper investigates the effect of the most relevant process parameters of the DED-LB/Powder process on the level and distribution of porosity. Results indicate that, among the process parameters examined, porosity is less affected by travel speed and more influenced by powder mass flow rate and laser power. Additionally, a three-dimensional finite element transient model was introduced, which was able to predict the development and location of lack-of-fusion pores along the building direction.

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Fabrication and Characterization of Nickel‐Aluminide Cladding by Dual‐Wire Arc Additive Manufacturing

Samadi,

Jamshidi Aval

2024

Adv Eng Mater

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Nickel aluminide is a widely utilized intermetallic compound, prized for its high strength, low density, and resistance to both corrosion and creep. This study investigates the impact of heat input during the fabrication of nickel‐aluminide intermetallic compounds using the dual‐wire gas tungsten arc welding (GTAW) process. The results indicate that an increase in clad layer dilution from 28.9% to 33.4% reduces the amount of aluminum in the molten pool from 32.46 wt.% to 21.96 wt.%, while increasing the presence of the Ni3Al phase. Additionally, the NiAl phase decreases when moving from the upper side of the coating to the fusion line. When the arc current is increased from 110 A to 150 A, a coarse dendritic structure forms, and the dendritic arms increase from 2.6±0.4 µm to 5.5±0.3 µm. This increase in current also results in yield strength and tensile strength values of 500.21±14.56 MPa and 752.32±25.12 MPa, respectively, representing decreases of 15.2% and 5.1%. Furthermore, as the arc current increases from 110 A to 150 A, both the friction coefficient and the wear rate increase to 0.43 and 0.29±0.02 µg/m, respectively. However, corrosion resistance improves by 66.3%.This article is protected by copyright. All rights reserved.

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Advances in Ultrasonic-Assisted Directed Energy Deposition (DED) for Metal Additive Manufacturing

Cited by 5 publications

References 116 publications

Evaluation of Porosity in AISI 316L Samples Processed by Laser Powder Directed Energy Deposition

Evaluation of Porosity in AISI 316L Samples Processed by Laser Powder Directed Energy Deposition

Evaluation of Porosity in AISI 316L Samples Processed by Laser-Powder Directed Energy Deposition

Fabrication and Characterization of Nickel‐Aluminide Cladding by Dual‐Wire Arc Additive Manufacturing

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