Characterization of Laser Powder Bed Fusion of Nickel-Based Superalloy Haynes 282

Swaminathan, Kameshwaran; Olsson, Jonas; Raza, Tahira; Harlin, Peter; Andersson, Joel

doi:10.1007/978-3-031-27447-3_35

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…Cubes with 10mm edge were manufactured in the similar fashion to a previous study by the authors [14], using SLM 280 2.0 Twin Laser 400W machine. The HAYNES® 282® powder produced by Sandvik under special license from Haynes International, Inc. with chemical composition provided in Table 2 was used in this study.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…MODDE software was used to analyze three different levels of hatch distance (0.132mm, 0.15mm and 0.168mm) and Central Composite Circle (CCC) design of 1.682 star distance, with center point of power at 350W and speed at 750mm/s. Also, high power of 395W was explored for CCC design of 1.682 star distance with center point of hatch distance at 0.15mm and speed at 750mm/s [14], [15]. Process parameters used for all the samples are provided in Table 1.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…This promote dissipation of the heat input over a larger area and avoid keyhole mode of melting even at high heat input given the 90 micron layer thickness [16], [17]. The sample preparation, measurement of porosity (defect area and porosity are interchangeably used in this manuscript), and melt pool dimensions are same as the previous study [14] and are shown in Figure 1. The sample cubes were cut parallel to build direction, polished and etched with oxalic acid.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The porosity measurements were performed on a 7mm square area to avoid the edge effects and intended to represent the gage section in tensile test specimens. The melt pool overlap depth provides the measure of remelting between layers [14].…”

Section: Experimental Methodsmentioning

confidence: 99%

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Multi-Variate Analysis of Laser Powder Bed Fusion with 90-μm Layer Thickness of Ni-Based Superalloy Haynes 282

Swaminathan,

Ali,

Olsson

et al. 2024

Advances in Transdisciplinary Engineering

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Laser powder bed fusion (PBF-LB) processing of Haynes 282 using a layer thickness of 90-μm is studied for process capability and feasibility for increased productivity. To optimize the build rate while producing metallurgically sound parts, the effect of laser parameters on the resulting melt pool dimensions and porosity are analyzed. In a previous study, individual parameters such as laser power, scan speed and hatch distance and combination have been studied. In this study, three levels of hatch distance have been investigated while varying power and speed to same extent at all three (3) hatch distance. Similarly, the highest power level has been studied for the effect of speed and hatch distance. The melt pool dimensions, and porosity were measured in the plane parallel to the build direction. Comparison of measured responses with individual parameters provides partial trends of melt pool dimensions and porosity. It was observed that high power and/or low speed and low hatch distance increase the melt pool dimensions and reduce porosity until keyhole mode is reached. Variation of two parameters while keeping the third parameter constant was found to affect porosity due to the transition from lack of fusion type defects to keyhole porosities. The presence of dominant type of defect is identified using average feret ratio, which is the ratio of maximum length to minimum length across parallel surfaces inside a defect. It is found successful to use the combination study of process parameters and resultant type of defects to map the process to achieve minimal defects is identified for 90-μm layer thickness, through the combination study of process parameters and the resultant type of defects.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Multi-Variate Analysis of Laser Powder Bed Fusion with 90-μm Layer Thickness of Ni-Based Superalloy Haynes 282

Swaminathan,

Ali,

Olsson

et al. 2024

Advances in Transdisciplinary Engineering

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Effect of solution treatment temperature on recrystallisation behaviour of Haynes 282 manufactured through laser powder bed fusion

Swaminathan,

Andersson

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Increasing layer thickness in Laser Powder Bed Fusion (PBF-LB) process of metals enable increasing productivity and facilitate industrialisation of metal additive manufacturing (AM) process. Understanding of microstructure in as-built stage and possible post-processing steps to modify the microstructure is critical for metal AM components. Haynes 282 Nickel based superalloy, typically used in aerospace and energy industries, was manufactured using PBF-LB process at 60 microns layer thickness. Two different solution treatment temperatures were studied to analyse the recrystallization behaviour of the as-built material. The as built microstructure consisted high dislocation density given the rapid cooling in PBF-LB process. Solution treatment at 1150°C resulted in reduced dislocation density but similar morphology to grains in as built condition with visible residual melt pool boundaries. Solution treatment at 1250°C resulted in recrystallised grain structure. The recrystallisation behaviour is discussed with relation to manufacturing process and kinetic behaviour of alloying elements.

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Laser Powder Bed Fusion Process Parameter Study on Nickel Based Superalloy Haynes 282

Swaminathan,

Gore,

Miocic

et al. 2024

Preprint

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Characterization of Laser Powder Bed Fusion of Nickel-Based Superalloy Haynes 282

Cited by 3 publications

References 25 publications

Multi-Variate Analysis of Laser Powder Bed Fusion with 90-μm Layer Thickness of Ni-Based Superalloy Haynes 282

Multi-Variate Analysis of Laser Powder Bed Fusion with 90-μm Layer Thickness of Ni-Based Superalloy Haynes 282

Effect of solution treatment temperature on recrystallisation behaviour of Haynes 282 manufactured through laser powder bed fusion

Laser Powder Bed Fusion Process Parameter Study on Nickel Based Superalloy Haynes 282

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