High temperature air oxidation behavior of Hastelloy X processed by Electron Beam Melting (EBM) and Selective Laser Melting (SLM)

Romedenne, Marie; Pillai, Rishi; Kirka, Michael M.; Dryepondt, Sébastien

doi:10.1016/j.corsci.2020.108647

Cited by 47 publications

(7 citation statements)

References 55 publications

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“…Corresponding measurements on oxidation kinetics indicate a relatively low high‐temperature oxidation rate in HIP Hastelloy X alloy, in which the rate of oxidation weight increase is comparable or slightly higher than those of the published works including Ni‐ and Fe‐based alloys. [ 18 ] This result implies a novel explanation of HIP posttreatment in improving the high‐temperature antioxidation ability of Hastelloy X alloys, which refers to the suppression of elemental diffusion through oxidation layers.…”

Section: Resultsmentioning

confidence: 97%

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Oxidation Behavior of Hastelloy X Alloy Fabricated by Selective Laser Melting and Subsequent Hot Isostatic Pressing Treatment

Wang

Liu

et al. 2022

Adv Eng Mater

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Hastelloy X is a typical solid solution strengthening superalloy featured by good tolerance against oxidation and adequate mechanical and creep properties at 900 °C. However, current works about Ni‐based superalloys mainly focus on the relationship between microstructure and mechanical performance at high‐temperature regions, leaving the failure mechanism under the circumstance of oxidation as an open issue. Herein, the effects of the microstructure on the high‐temperature oxidation behavior and mechanical properties of Hastelloy X alloys prepared by selective laser melting (SLM) technique and hot isostatic pressing (HIP), respectively, are investigated. The experimental results show the existence of a large number of microcracks in the SLM samples during oxidation at 900 °C, which can contribute to increased oxidation weight gain and ease of oxide layer exfoliation. With the assistance of HIP, thermal cracks are effectively eliminated by the combination of better elemental homogeneity. The further improvement of oxidation resistance is found to result from the densification of Cr2O3 particles and the hindrance of oxygen diffusion. From the perspective of the application, this work provides valuable support for the explanations of the oxidation resistance and fracture mechanism of Hastelloy X superalloys in high‐temperature service environments.

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Section: Resultsmentioning

confidence: 97%

“…Romedenne et al studied the air oxidation behavior of SLM‐fabricated Hastelloy X alloy exposed in a dry air atmosphere at 950 °C. [ 18 ] Moreover, enlightenment might be provided based on the isothermal oxidation kinetics of SLM‐IN718 in the air atmosphere at 600–850 °C.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Hastelloy X Alloy Fabricated by Selective Laser Melting and Subsequent Hot Isostatic Pressing Treatment

Wang

Liu

et al. 2022

Adv Eng Mater

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“…15b) compared to traditionally wrought Haynes 282 where carbides also contained Cr. Consequentially, due to the differences in carbide morphology and volume fraction, making them insufficient to block dislocation motion, E-PBF Haynes 282 was noted to have inferior mechanical properties compared to its No TCP or carbides reported [197,198] Mo-carbides [199][200][201] Mo-M x C y carbides [195,202] Mo-M 6 C carbides [202,203] Mo-M 12 C carbides [202] Mo, Cr, Ni, W, Si-M 6 C Carbides [204][205][206] Cr-M 23 C 6 carbides [205,206] Haynes Hf-carbides [125] wrought counterpart, demonstrating some challenges within AM for the use of carbides for strengthening [120].…”

Section: Other Secondary Precipitates and Tcp Phasesmentioning

confidence: 99%

Powder bed fusion additive manufacturing of Ni-based superalloys: a review of the main microstructural constituents and characterization techniques

et al. 2022

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Metal additive manufacturing (AM) has unlocked unique opportunities for making complex Ni-based superalloy parts with reduced material waste, development costs, and production lead times. Considering the available AM methods, powder bed fusion (PBF) processes, using either laser or electron beams as high energy sources, have the potential to print complex geometries with a high level of microstructural control. PBF is highly suited for the development of next generation components for the defense, aerospace, and automotive industries. A better understanding of the as-built microstructure evolution during PBF of Ni-based superalloys is important to both industry and academia because of its impacts on mechanical, corrosion, and other technological properties, and, because it determines post-processing heat treatment requirements. The primary focus of this review is to outline the individual phase formations and morphologies in Ni-based superalloys, and their correlation to PBF printing parameters. Given the hierarchal nature of the microstructures formed during PBF, detailed descriptions of the evolution of each microstructural constituent are required to enable microstructure control. Ni-based superalloys microstructures commonly include γ, γ′, γ′′, $$\delta$$ δ , TCP, carbides, nitrides, oxides, and borides, dependent on their composition. A thorough characterization of these phases remains challenging due to the multi-scale microstructural hierarchy alongside with experimental challenges related to imaging secondary phases that are often nanoscale and (semi)-coherent. Hence, a detailed discussion of advanced characterization techniques is the second focus of this review, to enable a more complete understanding of the microstructural evolution in Ni-based superalloys printed using PBF. This is with an expressed goal of directing the research community toward the tools necessary for a thorough investigation of the processing-microstructure-property relationships in PBF Ni-based superalloy parts to enable microstructural engineering.

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“…19 In 2014, Unocic et al 20 published a first study on the cyclic oxidation characterization of AM-alloy 718. Following these pioneering works carried out at ORNL, Romedenne et al 21 studied the cyclic oxidation in air at 950°C of the Hastelloy X alloy, produced by LBM and EBM, by comparing their behavior with that of the wrought alloy. They found that the oxide scale of the Hastelloy X alloy produced by EBM and LBM spalled faster than the wrought alloy.…”

Section: Effect Of Chemical Compositionmentioning

confidence: 99%

“…The resistance to cyclic oxidation and hot corrosion has been scarcely reported in the literature. [20][21][22] On this subject, special attention must be paid to impurities and minor elements that can affect the adhesion of the oxide layers (S, C, reactive elements, sulfide-forming elements).…”

Section: Summary Of Am Alloy Performance and Conclusionmentioning

confidence: 99%

High Temperature Oxidation of Additively Manufactured Structural Alloys

Monceau

Vilasi

2022

JOM

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Metal alloys produced by additive manufacturing have specifi c microstruc tures and compositions. Their microstructure is generally out of equilibrium, textured, and inhomogeneities can be observed. They can have pores and nano-inclusions. The contents of volatile elements may deviate from the nominal composition. These alloys often experience signifi cant interna! stresses and present fairly rough surfaces depending on the process used. Hipping these alloys modifies their microstructure and defects. This literature review shows that open porosity can lead to much higher oxidation kinetics than dense materials, with very deep interna! oxide penetrations. Neverthe less, when fabricated with optimized parameters, LBM-or EBM-alloys, such as TA6V, 718, or 316L, can behave as well as, or even better than, wrought alloys. The roughness of the surface is not necessarily problematic, but it can lead to local breakaway phenomena and premature spalling on some alloys. It has been verifi ed that the nature of the grain boundaries strongly affects the intergranular oxidation. The effect of chemical segregations on the protective nature of the outer oxide layer has also been reported. Today, too few studies have been devoted to the effect of raw and pre-oxidized surface states after HIP on cyclic oxidation and on hot corrosion of these alloys.

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High temperature air oxidation behavior of Hastelloy X processed by Electron Beam Melting (EBM) and Selective Laser Melting (SLM)

Cited by 47 publications

References 55 publications

Oxidation Behavior of Hastelloy X Alloy Fabricated by Selective Laser Melting and Subsequent Hot Isostatic Pressing Treatment

Oxidation Behavior of Hastelloy X Alloy Fabricated by Selective Laser Melting and Subsequent Hot Isostatic Pressing Treatment

Powder bed fusion additive manufacturing of Ni-based superalloys: a review of the main microstructural constituents and characterization techniques

High Temperature Oxidation of Additively Manufactured Structural Alloys

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