Investigation of hydrogen embrittlement properties of Ni-based alloy 718 fabricated via laser powder bed fusion

Yoo, Jisung; Kim, Se‐Lim; Jo, Min Cheol; Park, Hyungkwon; Jung, Jae‐Gil; Do, Jeonghyeon; Yun, Dae Won; Kim, In Soo; Choi, Baig-Gyu

doi:10.1016/j.ijhydene.2022.04.045

Cited by 19 publications

(8 citation statements)

References 91 publications

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“…Inconel 718 (IN718), a typical precipitation-strengthened nickel-based superalloy, possesses excellent mechanical properties such as good oxidation resistance, good weldability, corrosion resistance, high creep resistance, and high fatigue strength at high temperatures [1][2][3][4]. It has been widely used in high-temperature components such as turbine disks, aerospace gas turbine blades, and combustion chambers [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Selective laser melting (SLM) has advantages such as high forming precision [14] and integrated forming of high mechanical properties complex components [15], so it has become one of the most promising additive manufacturing technologies for metallic materials [4,[16][17][18]. Due to the rapid cooling rate of the molten pool in the SLM process [19], near net shape products with fine microstructure and excellent metallurgical strength can be manufactured layer by layer, such as complex parts manufactured with titanium alloy [20][21][22], steel [23,24], superalloys [25,26], and other materials [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Niu

et al. 2022

Crystals

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This work focused on the effects of laser energy density on the relative density, microstructure, and microhardness of Inconel 718 alloy manufactured by selective laser melting (SLM). The microstructural architectures, element segregation behavior in the interdendritic region and the evolution of laves phases of the as-SLMed IN718 samples were analyzed by optical metallography (OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and electron probe microanalysis (EPMA). The results show that with an increase in the laser volume energy density, the relative density and the microhardness firstly increased and then decreased slightly. It also facilitates the precipitation of Laves phase. The variation of mechanical properties of the alloy can be related to the densification degree, microstructure uniformity, and precipitation phase content of Inconel 718 alloy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Niu

et al. 2022

Crystals

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“…While heat treatment is effective in alleviating macro-stresses, residual stresses particularly along GBs may persist due to incomplete recrystallization, potentially escalating HE . Large residual stresses can also be associated to the cellular structures near fusion boundaries, as noted by Fu et al in a L-PBFed CoCrFeMnNi HEA.…”

Section: Knowledge Base About Hementioning

confidence: 98%

Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions

Yu,

Díaz,

et al. 2024

Chem. Rev.

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Hydrogen is considered a clean and efficient energy carrier crucial for shaping the net-zero future. Large-scale production, transportation, storage, and use of green hydrogen are expected to be undertaken in the coming decades. As the smallest element in the universe, however, hydrogen can adsorb on, diffuse into, and interact with many metallic materials, degrading their mechanical properties. This multifaceted phenomenon is generically categorized as hydrogen embrittlement (HE). HE is one of the most complex material problems that arises as an outcome of the intricate interplay across specific spatial and temporal scales between the mechanical driving force and the material resistance fingerprinted by the microstructures and subsequently weakened by the presence of hydrogen. Based on recent developments in the field as well as our collective understanding, this Review is devoted to treating HE as a whole and providing a constructive and systematic discussion on hydrogen entry, diffusion, trapping, hydrogen–microstructure interaction mechanisms, and consequences of HE in steels, nickel alloys, and aluminum alloys used for energy transport and storage. HE in emerging material systems, such as high entropy alloys and additively manufactured materials, is also discussed. Priority has been particularly given to these less understood aspects. Combining perspectives of materials chemistry, materials science, mechanics, and artificial intelligence, this Review aspires to present a comprehensive and impartial viewpoint on the existing knowledge and conclude with our forecasts of various paths forward meant to fuel the exploration of future research regarding hydrogen-induced material challenges.

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“…Thus, an in-depth understanding of hydrogen embrittlement in alloys is necessary to prevent hydrogen-induced catastrophic failures. While a number of studies have been conducted on the HE of Ni-based superalloys produced by wrought and other processes, limited research has been conducted on Ni-based AM components [38][39][40][41][42][43][44]. Among these studies, a majority focused on the effect of hydrogen on the mechanical properties and fracture behaviour of AM Inconel 718 [38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

“…While a number of studies have been conducted on the HE of Ni-based superalloys produced by wrought and other processes, limited research has been conducted on Ni-based AM components [38][39][40][41][42][43][44]. Among these studies, a majority focused on the effect of hydrogen on the mechanical properties and fracture behaviour of AM Inconel 718 [38][39][40][41][42][43][44]. For example, Hesketh et al [41] showed the mechanical degradation of AM builds with emphasis on the printing direction (vertical or horizontal), whilst Li et al [37] suggest that HE in AM Inconel 718 occurs along the γ/Laves interface.…”

Section: Introductionmentioning

confidence: 99%

Influence of dislocation cells in the hydrogen diffusivity, trapping and embrittlement of wrought and additively manufactured Inconel 718

Maldonado,

Zafra,

Pañeda

et al. 2024

Preprint

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Hydrogen embrittlement (HE) raises a major concern for the mechanical integrity of high-strength alloys, such as Ni-based superalloys exposed to hydrogen-rich environments. The diffusion and trapping of hydrogen atoms are critical factors governing HE. In this study, the role of microstructure, particularly dislocation cells, a characteristic microstructure of alloys made by Laser Powder Bed Fusion (LPBF), on hydrogen diffusion, trapping and embrittlement of additive manufactured (AM) and wrought Inconel 718 was investigated. For the first time, trapping behaviour in hydrogen-saturated AM Inconel 718 was analysed by thermal desorption spectroscopy (TDS) coupled with numerical simulations. A high density of hydrogen traps in the cell walls attributed to dense dislocations and Laves was responsible for the local accumulation of hydrogen, causing significant loss in the cohesive strength and triggering cracking along the dislocation cell walls. This influential role of dislocation cells alters the fracture behaviour from intergranular (seen in the wrought condition) to intragranular for the AM condition. In addition, the cellular network of dislocations acts as a short circuit accelerating hydrogen diffusion, enabling faster and deeper penetration of hydrogen in the AM condition. The results obtained in this study indicate that the higher HE susceptibility of AM Inconel 718 alloys is intrinsically associated with the interaction of hydrogen with dislocation walls.

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Investigation of hydrogen embrittlement properties of Ni-based alloy 718 fabricated via laser powder bed fusion

Cited by 19 publications

References 91 publications

Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions

Influence of dislocation cells in the hydrogen diffusivity, trapping and embrittlement of wrought and additively manufactured Inconel 718

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