Laser Welding under Vacuum: A Review

Jiang, Meng; Wang, Tao; Chen, Yanbin

doi:10.3390/app7090909

Cited by 29 publications

(12 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aside from aluminium HPDC alloys different research on laser vacuum welding of a broad variety of materials have been carried out in the past [12]. Experimental research has shown that the vacuum has several influences on the welding process and its outcome: For example, the increase of penetration depth, the degeneration of the vapour plume and the decrease of weld spatter were shown by diffrent authors [13][14][15][16].…”

Section: Defects In Laser Welded Aluminium High Pressure Die Castingsmentioning

confidence: 99%

Linear Elastic FE-Analysis of Porous, Laser Welded, Heat Treatable, Aluminium High Pressure Die Castings Based on X-Ray Computed Tomography Data

et al. 2020

View full text Add to dashboard Cite

The welding of aluminium high pressure die castings is a well known and broadly investigated challenge in various fields of industry and research. Prior research in this specific field mainly focused on the optimisation of the welding and the casting process and on the cause of the frequently occurring porosity and incomplete fusion phenomena, whereas the impacts of these defects have hardly been addressed. Therefore, the underlying study presents the investigation of weldments in EN AC-AlSi10MnMg high pressure aluminium die castings by linear elastic finite element analysis based on X-ray computed tomography as a novel approach. Hereby, four laser weldments with differing surfaces and pore contents were investigated by X-ray computed tomography and tensile testing. Based on the voxel datasets of the porous weldments, triangular finite element meshes were generated and a numerical finite element analysis was conducted. Good agreement of the stress–strain curves between the simulations and the experiments was achieved.

show abstract

Section: Defects In Laser Welded Aluminium High Pressure Die Castingsmentioning

confidence: 99%

Linear Elastic FE-Analysis of Porous, Laser Welded, Heat Treatable, Aluminium High Pressure Die Castings Based on X-Ray Computed Tomography Data

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Shielding of the laser beam is reduced because the vapour generated by the process dissolves faster into vacuum. Consequently, vacuum enables an improved deep welding process with high aspect ratios due to the increased penetration depths Jiang et al (2017). These results can be transferred to thermally activated processes in general and give a first idea about the tendency of the following process behaviour.…”

Section: Additive Manufacturing Under Gravity and Vacuummentioning

confidence: 87%

Additive Manufacturing Under Lunar Gravity and Microgravity

Reitz

Lotz

Gerdes

et al. 2021

Microgravity Sci. Technol.

View full text Add to dashboard Cite

Mankind is setting to colonize space, for which the manufacturing of habitats, tools, spare parts and other infrastructure is required. Commercial manufacturing processes are already well engineered under standard conditions on Earth, which means under Earth’s gravity and atmosphere. Based on the literature review, additive manufacturing under lunar and other space gravitational conditions have only been researched to a very limited extent. Especially, additive manufacturing offers many advantages, as it can produce complex structures while saving resources. The materials used do not have to be taken along on the mission, they can even be mined and processed on-site. The Einstein-Elevator offers a unique test environment for experiments under different gravitational conditions. Laser experiments on selectively melting regolith simulant are successfully conducted under lunar gravity and microgravity. The created samples are characterized in terms of their geometry, mass and porosity. These experiments are the first additive manufacturing tests under lunar gravity worldwide.

show abstract

“…The first one is a review paper from M. Jiang, W. Tao, and Y. Chen [11]. In this paper, a comprehensive overview on laser welding under vacuum is presented, which is a recently re-discovered laser welding technique [12] that can help in fully exploiting the potential of recently available high-power and high-brightness solid-state fiber and disk lasers.…”

Section: Solid State Lasers Materials Technologies and Applicationsmentioning

confidence: 99%