The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282

Boswell, John; Jones, Jonathan; Barnard, Nicholas; Clark, Dean S.; Whittaker, Mark; Lancaster, Robert

doi:10.1016/j.matdes.2021.109725

Cited by 30 publications

(11 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• was observed, respectively. An increase in the laser scan speed reduces the input energy density to the powder and substrate materials as discussed by Boswell et al [39]. This phenomenon is demonstrated in a previous work by Cunningham et al [40] over a wide range of processing speeds for bare plate testing.…”

Section: Laser Scan Speed Variationmentioning

confidence: 72%

“…For the depth and width dimensions, a linear trend between the laser scan speed and the depression zone dynamics with a slope of −186.1 µm•s m and −87.32 µm•s m was observed, respectively. An increase in the laser scan speed reduces the input energy density to the powder and substrate materials as discussed by Boswell et al [39]. This phenomenon is demonstrated in a previous work by Cunningham et al [40] over a wide range of processing speeds for bare plate testing.…”

Section: Laser Scan Speed Variationmentioning

confidence: 72%

See 1 more Smart Citation

Uncertainties Induced by Processing Parameter Variation in Selective Laser Melting of Ti6Al4V Revealed by In-Situ X-ray Imaging

et al. 2022

View full text Add to dashboard Cite

Selective laser melting (SLM) additive manufacturing (AM) exhibits uncertainties, where variations in build quality are present despite utilizing the same optimized processing parameters. In this work, we identify the sources of uncertainty in SLM process by in-situ characterization of SLM dynamics induced by small variations in processing parameters. We show that variations in the laser beam size, laser power, laser scan speed, and powder layer thickness result in significant variations in the depression zone, melt pool, and spatter behavior. On average, a small deviation of only ~5% from the optimized/reference laser processing parameter resulted in a ~10% or greater change in the depression zone and melt pool geometries. For spatter dynamics, small variation (10 μm, 11%) of the laser beam size could lead to over 40% change in the overall volume of the spatter generated. The responses of the SLM dynamics to small variations of processing parameters revealed in this work are useful for understanding the process uncertainties in the SLM process.

show abstract

Section: Laser Scan Speed Variationmentioning

confidence: 72%

Section: Laser Scan Speed Variationmentioning

confidence: 72%

Uncertainties Induced by Processing Parameter Variation in Selective Laser Melting of Ti6Al4V Revealed by In-Situ X-ray Imaging

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Additionally, Haynes 282 is highly susceptible to forming, more so than nickel alloys with similar creep strength [ 1 ]. Due to this combination of properties, this nickel superalloy is used in the aviation industry for compressors and turbine housings, as well as for exhaust nozzles and diffusers, due to its good weldability [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…A common method of producing superalloys in aviation is investment casting, which, though widespread, is ineffective in terms of both cost and time. Limitations, such as the development of new wax models and tools for producing them, and the low strength of ceramic molds and core materials [ 2 , 3 ], has led to a search for replacement technologies that would enable more profitable and time-efficient production. Additive manufacturing (AM) may become such a technology.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Impact of Plastic Deformation on the Microstructure and Tensile Strength of Haynes 282 Nickel Superalloy Produced by DMLS and Casting

et al. 2022

View full text Add to dashboard Cite

The article presents the results of research on the influence of plastic deformation on the microstructure and tensile strength of Haynes 282 nickel superalloy produced by direct metal laser sintering (DMLS) and a conventional technique (casting). Samples were tested for dimensional accuracy using a 3D scanner. Then, the samples were subjected to plastic deformation by rolling. The microstructures of the DMLS and the as-cast samples were analysed using a scanning electron microscope. The strength properties of the samples were determined in a static tensile test. Microhardness measurements of the samples were also performed. Based on the analysis of the dimensional accuracy, it was found that the surface quality of the components produced by DMLS is dependent on the input parameters of the 3D printing process. Using the DMLS method, it is possible to produce Haynes 282 with a fine-crystalline microstructure containing dendrites. The fine-crystalline dendritic microstructure and low porosity showed very good tensile strength compared to the as-cast material. It was also found that the increase in the degree of plastic deformation of the as-cast Haynes 282 and the samples produced by the DMLS technique resulted in an increase in the strength of the tested samples, with reduced ductility.

show abstract

Effects of Reduction‐Oxidation Cycles on the Structure, Heat and Corrosion Resistance of Haynes 282 Nickel Alloy Manufactured by Using Powder Bed Fusion‐Laser Beam Method

Kamiński,

Adamczyk‐Cieślak,

Kopec

et al. 2024

Materials & Corrosion

View full text Add to dashboard Cite

The study investigated the effect of the oxidation–reduction cycles on the structure and corrosion resistance of the Haynes 282 nickel superalloy at ambient and elevated temperatures. The comparative studies were performed on specimens produced by the Powder Bed Fusion‐Laser Beam (PBF‐LB) process and those in the as‐received state. The microstructure of the PBF‐LB specimens was studied using optical and scanning electron microscopy, whereas the chemical composition of the scale formed after isothermal oxidation in an air atmosphere at 750°C was analysed using energy‐dispersive X‐ray spectroscopy and X‐ray Photoelectron Spectroscopy. The phase composition of the formed scale was determined by X‐ray diffraction. Laboratory‐induced hydrogen atmosphere was adopted through cathodic charging. A comparison of corrosion resistance was carried out on two types of Haynes 282 specimens, before and after the oxidation and cathodic charging processes. It was found that PBF‐LB process could be effectively used to manufacture Haynes 282 nickel superalloy with low porosity and a fine crystalline microstructure. The low‐porous, fine‐crystalline microstructure of the tested specimens produced by the PBF‐LB technique exhibited good resistance to electrochemical corrosion, slightly lower than wrought Haynes 282 nickel superalloy specimens.

show abstract

The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282

Cited by 30 publications

References 23 publications

Uncertainties Induced by Processing Parameter Variation in Selective Laser Melting of Ti6Al4V Revealed by In-Situ X-ray Imaging

Uncertainties Induced by Processing Parameter Variation in Selective Laser Melting of Ti6Al4V Revealed by In-Situ X-ray Imaging

The Impact of Plastic Deformation on the Microstructure and Tensile Strength of Haynes 282 Nickel Superalloy Produced by DMLS and Casting

Effects of Reduction‐Oxidation Cycles on the Structure, Heat and Corrosion Resistance of Haynes 282 Nickel Alloy Manufactured by Using Powder Bed Fusion‐Laser Beam Method

Contact Info

Product

Resources

About