Surface investigation on aluminium composite by additive manufacturing process

Sellamuthu, P.; Reddy, P. N.; Ramesh, R.; Kiranmai, M. Haritha; Gupta, CH.LDS. Narayana; Das, Anshuman; Subbiah, Ram

doi:10.1016/j.matpr.2022.07.249

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…On the one hand, the surface quality of LPBF is generally much poorer than conventional processes. The LPBF surface is often uneven and easily forms defects such as balling [1]. On the other hand, the poor surface quality, adverse to the mechanical property, such as the fatigue strength, further restricts the application of LPBF products [2].…”

Section: Introductionmentioning

confidence: 99%

The influence of surface morphology of the as-fabricated layer on the molten pool flow behavior during the forming process of the next layer for laser powder bed fusion

Xiang,

Huang,

Yin

2023

J. Phys.: Conf. Ser.

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The surface morphology is essential for the fabricated quality of Laser powder bed fusion (LPBF) additive manufacturing. There is a trend that more and more researchers are an attempt to improve surface quality unlimited. However, besides the final layer for the fabricated products, which directly affects the performance and user experience, does the surface morphology of the as-fabricated layer have an altogether positive effect on the forming process of the next layer? Furthermore, does it need to improve the surface quality unlimited? In this research, three kinds of typical surface morphology, flat surface, balling surface, and periodic rough surface, were analyzed and simplified. Then a fluid-heat coupling numerical model was built considering the surface morphology of the as-fabricated layer. The flow behavior of the molten pool during the forming process of the next layer under different kinds of surface morphology of the as-fabricated layer was investigated. The results indicate that achieving an excessively high-quality surface morphology is needless, and an appropriate periodic rough surface is beneficial to improve the forming quality.

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Section: Introductionmentioning

confidence: 99%

The influence of surface morphology of the as-fabricated layer on the molten pool flow behavior during the forming process of the next layer for laser powder bed fusion

Xiang,

Huang,

Yin

2023

J. Phys.: Conf. Ser.

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Weld morphology, microstructure evolution, and mechanical properties of laser beam welding of wire arc additive manufactured Al-Cu substrate

Shi

Wang

Zhan

et al. 2022

Int J Adv Manuf Technol

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Additive manufacturing (AM) cannot meet the manufacturing requirements of speci c large structures, so use the welding method to joint the small size parts of AM to solve the problem. In work, the laser weld 3mm thick samples cut from WAAM block under different laser powers and welding directions to explore the feasibility of technology. The properties evolution, and weldability of the laser-welded wire arc additive manufactured Al-Cu alloy joints are investigated. The results indicate that the wire arc additive manufactured Al-Cu alloy has excellent laser weldability without apparent detection. The microstructures of the laser-welded joints consist of columnar grains, dendrites and ne equiaxed grains. The 3500 W laser power joint has higher tensile strength and elongation than other laser powers, reaching 203.48 MPa, 4.13%. Compared with the different welding direction joints, "0°and 0°" has the higher tensile strength and elongation, reaching 180.77 MPa, 2.40%. The microstructures have a weak effect, but the anisotropy plays a signi cant role in the tensile properties. This study has demonstrated that it is possible to laser-welded WAAM samples, and provide solutions that AM technology di cultly produces large size parts.

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Surface investigation on aluminium composite by additive manufacturing process

Cited by 2 publications

References 20 publications

The influence of surface morphology of the as-fabricated layer on the molten pool flow behavior during the forming process of the next layer for laser powder bed fusion

The influence of surface morphology of the as-fabricated layer on the molten pool flow behavior during the forming process of the next layer for laser powder bed fusion

Weld morphology, microstructure evolution, and mechanical properties of laser beam welding of wire arc additive manufactured Al-Cu substrate

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