Porosity in wire-arc directed energy deposition of aluminum alloys: Formation mechanisms, influencing factors and inhibition strategies

Additive manufacturing, Journal Year: 2024, Volume and Issue: 84, P. 104108 - 104108

Published: March 1, 2024

Language: Английский

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Molten pool behaviors and forming characteristics in wire-laser directed energy deposition with beam oscillation

Journal of Materials Processing Technology, Journal Year: 2024, Volume and Issue: 326, P. 118326 - 118326

Published: Feb. 9, 2024

Language: Английский

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Porosity in cored-wire-arc directed energy deposition of TiC/Al composite: formation mechanism and inhibition strategy

Virtual and Physical Prototyping, Journal Year: 2025, Volume and Issue: 20(1)

Published: Jan. 8, 2025

Porosity is an unavoidable problem in aluminium alloy wire-arc directed energy deposition (DED), becoming even more prominent aluminium-matrix powder core wires, which significantly limits their performance and application potential. This study combines DED technology with Al-matrix cored wire for the first time, successfully fabricating monolayer multilayer composite components using a custom-designed TiC/Al-matrix wire. The pore types formation mechanisms cored-wire-arc TiC/Al composites were systematically investigated. findings indicate that: (1) Compared to conventional alloys, exhibited larger pores higher porosity. Additionally, novel type, enclosed by Ti Si elements, was identified. (2) Pores concentrate near specimen edges due migration, aggregation, prolonged stabilisation of large bubbles melt pool. (3) To mitigate porosity, strategies spiral arc oscillation (SO) ultrasonic vibration assisted (UA) innovatively introduced, effectively reducing porosity levels. SO enhances pool flow, 47% relative as-deposited (AD) specimens. UA induces cavitation effects acoustic enhancing Marangoni flow 63% + presents approach high-performance fabrication.

Language: Английский

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Influence of in-situ precipitation on corrosion behaviors of wire arc directed energy deposited Al-Mg(-Sc-Zr)

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Influencing mechanisms of melt behavior on metal vapor characteristic and columnar grain formation in wire-arc directed energy deposition of titanium alloy

Additive manufacturing, Journal Year: 2024, Volume and Issue: 82, P. 104029 - 104029

Published: Feb. 1, 2024

Language: Английский

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Hybrid interlayer hot rolling and wire arc additive manufacturing of Al-Mg alloy: Microstructure, mechanical properties and strengthening mechanism

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 30, P. 7037 - 7050

Published: May 1, 2024

Considering the deformation-strengthening benefits of Al-Mg alloy and high forming efficiency offered by wire arc additive manufacturing (WAAM), microstructure evolution strengthening mechanism hybrid interlayer hot rolling (HR-WAAM) samples have been systematically investigated in this study. The results indicate that can effectively reduce size number pores, which diminishes stress concentration areas. Additionally, deformation significantly enhances effect dislocation strengthening. Furthermore, a density dislocations promote recrystallization to refine grain size, while also improving orientation, all contribute better distribution. Due these reasons, strength toughness are notably improved. average ultimate tensile (UTS), yield (YS), elongation (EL) values achieved HR-WAAM were 338 MPa, 276 20.9%, respectively. These represent increases 28.5%, 41.5%, 38.4% compared conventional WAAM samples. findings expected provide an efficient cost-effective method for (AM) deformation-strengthened aluminum alloys.

Language: Английский

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Microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by multi-wire arc-based directed energy deposition

Journal of Manufacturing Processes, Journal Year: 2024, Volume and Issue: 124, P. 661 - 672

Published: June 24, 2024

Language: Английский

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Sc/Zr microalloying on strength-corrosion performance synergy of wire-arc directed energy deposited Al-Mg

Virtual and Physical Prototyping, Journal Year: 2024, Volume and Issue: 19(1)

Published: June 4, 2024

WADED Al-Mg and Al-Mg-Sc-Zr aluminium alloy thin-wall components were produced. Heat treatment (350°C aging for 4 h) was further conducted. The effects of Sc/Zr addition on porosity, microstructure, mechanical properties corrosion behaviour investigated. With adding, pore area fraction decreased from 0.208 to 0.005% grain size 84.34 19.54 μm. In component, microstructure showed refined equiaxed grains. Mechanical improved with 360 MPa ultimate tensile strength (UTS), 185 yield strength, 23.31% elongation. After heat treatment, UTS increased 388 good ductility (22.53%) maintained. refinement Al3(Sc, Zr) particles the key factors property improvement. introduced optimised after treatment. exhibited layered characteristics due distribution primary while minor-size secondary along boundaries behaviour.

Language: Английский

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Laser powder bed fusion of TaC-reinforced FV520B maraging steel with simultaneous enhancement of mechanical properties and corrosion resistance

Virtual and Physical Prototyping, Journal Year: 2025, Volume and Issue: 20(1)

Published: Feb. 16, 2025

Language: Английский

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IN718-LCS bi-metallic deposition by wire arc additive manufacturing: Issues, mitigation strategies, and interfacial behavior

Journal of Manufacturing Processes, Journal Year: 2025, Volume and Issue: 140, P. 204 - 223

Published: Feb. 25, 2025

Language: Английский

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