Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

Huebner, Jan; Kata, Dariusz; Rutkowski, Paweł; Petrzak, Paweł; Kusiński, J.

doi:10.3390/ma11101797

Cited by 13 publications

(7 citation statements)

References 36 publications

(56 reference statements)

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“…It then reacted with Cr originating from the alloy due to its microsegregation. The behavior of these elements was previously analyzed [ 27 ] and confirmed in the case of the Inconel 625–WC system [ 28 , 29 ], which agrees with the data presented in Figure 1 . This is based on partition coefficient k, defined by the relationship between the selected element concentration in the dendrite core or cell and its average concentration in the analyzed area.…”

Section: Resultssupporting

confidence: 85%

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Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

et al. 2020

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In this study, an Inconel 625–tungsten carbide (WC) composite system was investigated by means of microstructure changes affected by both heating rate and WC content. In order to investigate how the system behaves while exposed to fast thermal processing, controlled melting using a differential thermal analysis (DTA) apparatus was performed on the powders. Two WC powders with different average grain size were used to obtain six compositions of Inconel 625–WC powder mixtures (10, 20, and 30 wt.% WC). They were analyzed under 10 and 30 °C/min heating rate in order to obtain composite samples. Results from DTA together with SEM/energy-dispersive X-ray spectroscopy (EDS) microstructural observations allowed observing material changes during solidification. Because of the extensive microsegregation of alloying elements to liquid and their reactions with C, which derived from dissolved WC, the formation of secondary phases with improved microhardness was possible. The collected results provide a better understanding of material behavior during intensive thermal processing which can be useful when designing materials for the laser additive manufacturing technique.

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Section: Resultssupporting

confidence: 85%

“…It was previously confirmed that laser additive manufacturing methods are characterized by a large amount of heat delivered to powder material, which leads to rapid temperature increase [ 29 ]. As seen in Figure 7 , major changes were observed between samples obtained with lower ( Figure 7 A,B) and higher heating rates ( Figure 7 C,D).…”

Section: Resultsmentioning

confidence: 99%

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

et al. 2020

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“…Nickel-based superalloys are widely used in high-temperature applications, especially in the aerospace and energy industries. Due to its good structural stability, superior high-temperature strength, and oxidation resistance, it has become one of the irreplaceable components in high-temperature applications, such as turbine blades, engine discs, and gas turbines [ 1 , 2 , 3 , 4 ]. With the continuous development of aerospace technology, the function, structure and performance of its components have been put forward more stringent requirements, the integration of structure molding is conducive to improve the functional, lightweight, and mechanical properties of aviation components.…”

Section: Introductionmentioning

confidence: 99%

High Strain Rate Yielding of Additive Manufacturing Inconel 625 by Selective Laser Melting

Yang

et al. 2021

Materials

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Nickel-based alloy Inconel 625, produced by the selective laser melting method, was studied experimentally for its mechanical performance under strain rate loading using Hopkinson bars. Both compression and tensile tests were carried out, with the former also being conducted at 500 °C. The strain rate was in the range of 300 to 3500 s−1 at ambient temperature, and 1200 to 3500 s−1 at the elevated temperature, respectively, for compression tests, and 900 to 2400 s−1 for tensile tests. Results show that the alloy has a strong rate sensitivity with the dynamic yield stress at 3500 s−1, almost doubling the quasistatic value. The test results also show that, even though the temperature elevation leads to material softening, the strain rate effect is still evidential with the dynamic compressive yield stress at the rate 103 s−1 and 500 °C still being higher than the quasistatic one at ambient temperature. It is also observed that dynamic tensile strengths are generally higher than those of compressive ones at room temperature.

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“…To the authors' knowledge, the chemical interaction between Ni superalloy and WC has been poorly studied until now. Some investigations have been carried out on a composite produced by additive manufacturing and laser cladding [23][24][25][26] The aim of this work is to investigate the interaction between WC and IN625 during sintering of a prior compacted powder. Large IN625 particles were used in order to obtain a wide and localized interface region to facilitate the analyses at the Scanning Electron Microscope (SEM).…”

Section: Introductionmentioning

confidence: 99%

Interaction between WC and Inconel 625 under Solid and Liquid State Sintering Conditions

Emanuelli

Molinari

Pellizzari

2021

Metals

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Cobalt is the most used metal binder in hard metals since its extraordinary wetting, adhesion and mechanical properties. Nevertheless, it has been recognized genotoxic and cancerogenic with higher toxicity in combination with WC. To substitute Co with an alternative binder, the interaction between the binder and WC must be taken into account. In this work, IN625 is considered as a binder alternative due to its desirable combination of high-temperature strength and corrosion/oxidation resistance. A characterization of the interaction between WC and IN625 was carried out by means of Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDXS) and X-Ray Diffraction (XRD). Depending on the sintering temperatures, different phases were evidenced at the WC–IN625 superalloy interface. From 1250 °C to 1300 °C, where solid-state sintering takes place, (Cr,Mo)23C6, W2C and (Cr,W) solid solutions were detected. At a sintering temperature of 1350 °C, IN625 melts and the formation of additional phases, such as an intermetallic Ni4W phase and (Mo,W) and (Mo,Nb) solid solutions, were observed. The precipitation of NbC and (Mo,Cr)23C6 carbides in IN625 was also detected.

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Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

Cited by 13 publications

References 36 publications

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

High Strain Rate Yielding of Additive Manufacturing Inconel 625 by Selective Laser Melting

Interaction between WC and Inconel 625 under Solid and Liquid State Sintering Conditions

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