Laser generating metallic components

McLean, Marc A.; Shannon, G. J.; Steen, W. M.

doi:10.1117/12.270181

Cited by 27 publications

(12 citation statements)

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“…The mean widths of the walls are between 1.2 and 2.4 times the laser spot diameter, normally held as the most important factor in determining wall width [21], which indicates that conduction of heat from the laser beam incident point produced an enlarged melt pool at the traverse speeds adopted (2 mm/s). Taking the layer thicknesses and widths together (assuming a rectangular cross-section), indicates that at both power levels, more GA than WA powder was deposited at the same powder mass flow rates, almost entirely due to the difference in layer thicknesses.…”

Section: Discussionmentioning

confidence: 99%

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Direct additive laser manufacturing using gas- and water-atomised H13 tool steel powders

Pinkerton¹,

Li²

2004

Int J Adv Manuf Technol

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To date only gas-atomised tool steel powders have been used for direct laser additive manufacturing and the potential benefits of using water-atomised powders have not been explored. As the use of the process in the rapid tooling field is growing, there is a need to explore if the less expensive wateratomised materials can be realistically utilised. A comparative investigation is described, using gas-and water-atomised H13 powder deposited with a CO 2 laser and coaxial powder feed nozzle. Multiple layer wall dimensions, composition, microstructure, surface finish and hardness are related to process conditions and the causes of the observed phenomena are discussed. An energy-balance method is used to model the temperature of the powders and the results used to explain some of the effects. Results indicate that using the lower cost water-atomised powder still allows a metallurgically sound component to be built and does not significantly affect surface finish. The build rate is, however, lower and the water-atomised powder tends to produce slightly softer walls, attributable to a higher temperature during tempering of deposited material by subsequent laser passes.

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Section: Discussionmentioning

confidence: 99%

“…As previous work has shown there to be considerable temperature variation between particles [21], rearrangement of Eq. 3 and Eq.…”

Section: Discussionmentioning

confidence: 99%

Direct additive laser manufacturing using gas- and water-atomised H13 tool steel powders

Pinkerton¹,

Li²

2004

Int J Adv Manuf Technol

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“…Consequently, the deposi tion head can add materials from different orientations. The laser direct casting process [10] uses a similar approach by rotating built parts to achieve multidirectional fabrication. A multidirectional UV lithography process at micro-and nanoscales is discussed in Ref.…”

Section: Journal Of Manufacturing Science and Engineeringmentioning

confidence: 99%

Development of a Low-Cost Parallel Kinematic Machine for Multidirectional Additive Manufacturing

Song

Pan

Chen

2015

Journal of Manufacturing Science and Engineering

119

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Most additive manufacturing (AM) processes are layer-based with three linear motions in the X, Y, and Z axes. However, there are drawbacks associated with such limited motions, e.g., nonconformal material properties, stair-stepping effect, and limitations on building-around-inserts. Such drawbacks will limit AM to be used in more general appli cations. To enable 6-axis motions between a tool and a work piece, we investigated a Stewart mechanism and the feasibility o f developing a low-cost 3D printer fo r the multi directional fused deposition modeling (FDM) process. The technical challenges in devel oping such an AM system are discussed including the hardware design, motion planning and modeling, platform constraint checking, tool motion simulation, and platform cali bration. Several test cases are performed to illustrate the capability o f the developed mul tidirectional AM system. A discussion o f future development on multidirectional AM systems is also given.

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“…W.M. Steen and J. Mazumder first tested the idea on rapid prototyping by laser cladding in 1993 (1)(2) , metallic components were reported to be generated by laser cladding in 1996 (3) , 3D components of H13 tool steel were fabricated by Direct Metal Deposition in 1997 (4) , then a lot of further research work was performed in many different institutes with different names for the direct manufacturing process and great progress has been made during recent years (5)(6)(7)(8)(9)(10)(11)(12) . LRM can be well used for producing small batch of specific material, specific properties and/or specific geometry valuable components, which are normally unavailable or very costly by conventional methods.…”

Section: Introductionmentioning

confidence: 98%

Laser rapid manufacturing of special pattern Inco 718 nickel-based alloy component

et al. 2005

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Laser rapid manufacturing based on laser cladding is a novel layer additive manufacturing technology, which can be well used for producing specific material, geometry and properties components normally unavailable or very costly by conventional methods. This paper presents a project research work on laser rapid manufacturing of Inco 718 nickel based alloy component with special pattern for aeronautical application. The required pattern Inco 718 nickel based alloy component was manufactured directly by laser deposition with optimized parameters: laser power: 800W, laser beam diameter: 0.8mm, scanning speed: 0.5m/min, powder feeding rate: 3g/min; The basic microstructure of laser deposited sample is directionally solidified columnar structure, with metallurgical bound to the substrate. Laser deposited component has good metallurgical and compositional and hardness homogeneity. The average hardness is about Hv 0.2 440. The tensile strength of the laser deposited Inco 718 sample is respectively 121 and 116 kgf/mm 2 at room temperature and at 650ºC,which are a little bit less than the data of forged Inco 718 plate 142 and 127 kgf/mm 2 due to its directional solidified columnar structure perpendicular to the tensile test force.

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Laser generating metallic components

Cited by 27 publications

References 0 publications

Direct additive laser manufacturing using gas- and water-atomised H13 tool steel powders

Direct additive laser manufacturing using gas- and water-atomised H13 tool steel powders

Development of a Low-Cost Parallel Kinematic Machine for Multidirectional Additive Manufacturing

Laser rapid manufacturing of special pattern Inco 718 nickel-based alloy component

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