Processing of Haynes® 282® Alloy by Laser Powder Bed Fusion Technology

Otto, Robert; Brøtan, Vegard; Azar, Amin S.; Åsebø, Olav

doi:10.1007/978-3-030-05861-6_47

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…[ 20 ] Bulk PBF‐LB/M processes for Haynes 282 have showed that the material is additively manufacturable and has promising process stability. [ 21,22 ] Haynes 282 as a material for open‐porous structures–intended pores by PBF‐LB/M process parameter adaptions‐have not been scientifically investigated, yet. Therefore, the process parameter boundaries and the process stability were not examined, as well.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Process Stability and Part Positioning Influence on the Relative Density of Designed Materials via Laser‐Based Powder Bed Fusion of Metals on a Multi‐Laser Machine

et al. 2021

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Component production via laser‐based powder bed fusion of metals (PBF‐LB/M) is becoming reality for multiple applications. Especially for sophisticated parts, as in case of gas turbines, assurance of repeatable properties involves control of process and machine parameters. PBF‐LB/M is used to build configurable open‐porous structures—designed materials (DMs)—out of the high temperature superalloy Haynes 282 with relative densities from 35 % to 65 % . The objective is investigating positioning influence and process stability based on their relative densities in discrete scan fields and build jobs. As DMs made from Haynes 282 are not yet scientifically investigated, first the process boundaries are identified. The used PBF‐LB/M machine—EOS M 400‐4—works with four lasers in four quadrants—a quadrant benchmarking is carried out. The experiment is repeated in a second build job. Scatter is identified in quadrant and build job benchmarking. A further aspect under investigation is positioning within laser quadrants. However, keeping laser and parameter combinations constant, sample locations are assessed. A relative density dependency on the laser deflection angle—as a positional measure—is observed. The results of positioning influence and scatter are used to formulate a tolerance equation for relative densities of DMs.

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Section: Introductionmentioning

confidence: 99%

Investigation on Process Stability and Part Positioning Influence on the Relative Density of Designed Materials via Laser‐Based Powder Bed Fusion of Metals on a Multi‐Laser Machine

et al. 2021

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“…Static mechanical properties and yield stress of Inconel 718 being slightly better than Haynes 282 is due to its structure gamma-double-prime (γ ). However, Inconel 718 presents a faster weakening at high temperatures when compared to Haynes 282, this fact being influent on the enhanced difficulty of Haynes 282 machining when compared to Inconel 718 [37].…”

Section: Drymentioning

confidence: 99%

High-Pressure Cooling in Finishing Turning of Haynes 282 Using Carbide Tools: Haynes 282 and Inconel 718 Comparison

Díaz-Álvarez

Cantero

et al. 2021

Metals

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Despite the interest of industry in nickel-based superalloys and its main features (high temperatures resistance, hardness, low thermal conductivity, among others), even today they are still materials that are difficult to cut. Cutting tools withstand both high pressures and temperatures highly localized at the cutting area because of the elevated work hardening of the alloy and the problems for the cutting fluid to access the region, with the consequent strong tool wear. The use of cutting fluids at high pressures improves coolant access and heat removal. This paper analyzed the machining of Haynes 282 alloy by means of coated carbide tools under high-pressure cutting fluids at finishing conditions. Tests were developed at different cutting speeds and feeds quantifying the machining forces, surface roughness, tool wear, and tool life. Values of 45.9 min and Ra between 2 µm and 1 µm were obtained in this study for tool life and roughness, respectively, for the combination of cutting speed 50 m/min and feed 0.1 mm/rev. Likewise, a comparative analysis is included with the results obtained in previous works developed by the authors relating to the finishing turning of Haynes 282 and Inconel 718 under conventional pressure cooling. The comparative analysis with Inconel 718 is included in the study due to its importance within the nickel base superalloys being widely used in industry and widely analyzed in scientific literature.

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“…Three builds were conducted, with the parameters listed in Table 3. The process parameters for these builds were selected from a previous study [6], focusing on the highest achieved relative densities. To distinguish different parameter sets, the volumetric energy density E vol has been chosen as the figure of merit.…”

Section: Manufacturing Parameters Scan Strategies and Post Processingmentioning

confidence: 99%

“…Scan strategies applied in the previous study, namely, the standard and modified island strategy [6] have been complemented with two additional strategies. These strategies are developed by the authors in order to achieve a better understanding of the effect of heat distribution in the processed samples.…”

Section: Manufacturing Parameters Scan Strategies and Post Processingmentioning

confidence: 99%

“…In an early study reported by researchers involved in the present study [6], the challenges of processing the H282 alloy were delineated. Despite the lack of success in finding suitable process parameters, results from 84 fabricated test cubes using 36 settings have shown that the process parameter alone has a tremendous effect on the formation of the pores and cracks in the material.…”

Section: Introductionmentioning

confidence: 99%

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Roadmap for Additive Manufacturing of Haynes® 282® Superalloy by Laser Beam Powder Bed Fusion (PBF-LB) Technology

Otto¹,

Brøtan²,

Carvalho³

et al. 2020

SSRN Journal

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A comprehensive approach was introduced for investigating the root cause of material failure under AM conditions. • HAYNES® 282® (H282) superalloy was investigated as a new material for laser beam powder bed fusion (PBF-LB) technology. • Precipitation-and residual stress control under recurrent thermal cycles are key to success in PBF-LB processing of H282. • Heated build platform to 300°C and novel scan strategy results in low porosity and micro-crack free material. • Hot isostatic pressing recrystallizes the microstructure, eliminates porosity and heals the micro-cracks.

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Processing of Haynes® 282® Alloy by Laser Powder Bed Fusion Technology

Cited by 5 publications

References 6 publications

Investigation on Process Stability and Part Positioning Influence on the Relative Density of Designed Materials via Laser‐Based Powder Bed Fusion of Metals on a Multi‐Laser Machine

Investigation on Process Stability and Part Positioning Influence on the Relative Density of Designed Materials via Laser‐Based Powder Bed Fusion of Metals on a Multi‐Laser Machine

High-Pressure Cooling in Finishing Turning of Haynes 282 Using Carbide Tools: Haynes 282 and Inconel 718 Comparison

Roadmap for Additive Manufacturing of Haynes® 282® Superalloy by Laser Beam Powder Bed Fusion (PBF-LB) Technology

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