Microstructure and Hardness Evolution of Solution Annealed Inconel 625/TiC Composite Processed by Laser Powder Bed Fusion

Marchese, Giulio; Aversa, Alberta; Bassini, Emilio

doi:10.3390/met11060929

Cited by 14 publications

(2 citation statements)

References 40 publications

(50 reference statements)

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“…Additionally, they stated that at this temperature the strengthening elements are gradually dissolved into the matrix. Marchese et al [44] studied the interaction of individual phases in a pure IN 625 and with an addition of TiC. The experiment involved standard solution annealing at 1150 °C for 2 h, followed by water quenching The aim of the heat treatment was to solubilize the material, triggering recrystallization, and grain growth.…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on the microstructure and properties of IN 625 specimens manufactured by selective laser melting

Sitek

Ciftci

Moszczyńska

et al. 2022

Archiv.Civ.Mech.Eng

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The study examines the effect of the annealing on the microstructure, tensile strength (small flat dog-bone specimen size with 5 mm dimension of measuring base) and corrosion resistance of IN 625 nickel superalloy specimens manufactured by means of selective laser melting method (SLM). The annealing of such specimens was carried out in a chamber furnace in a protective atmosphere of argon at a temperature of 1038 °C for 1 h. The cooling process was carried out in an atmosphere of air at ambient temperature. The microstructure of the IN 625 nickel superalloy after the 3D printing process and after the post-process heat treatment (HT) was examined by means of scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The results showed a uniform microstructure after the SLM process with element microsegregation. The cooling rate in the heat treatment was not sufficient which caused precipitation at the grain boundaries, most probably carbides and resulted in only a partial increase in ductility much lower than that of the material in initial state despite the high temperature applied during the annealing. The strength in the HT was on a level comparable to as-build state, 852 MPa and 891 MPa, respectively. Additional corrosion resistance tests were performed by the potentiodynamic method in a 3.5% NaCl solution at room temperature. HT increased the current density variation from ipass due to the formed precipitates. Our studies show that the size effect is an important factor when assessing the properties of IN 625 obtained using SLM. Despite similar microstructure, the structure defects play a more significant role which translates into lower mechanical properties than in normal sized specimens defined by the standard ASTM E8.

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Section: Introductionmentioning

confidence: 99%

Effect of annealing on the microstructure and properties of IN 625 specimens manufactured by selective laser melting

Sitek

Ciftci

Moszczyńska

et al. 2022

Archiv.Civ.Mech.Eng

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“…Selective laser melting (SLM) is a type of fusion additive manufacturing technology in which a laser beam is selectively scanned to melt a powder of materials (layer by layer) by an optics and scanner system [1]. Recently, there has been considerable interest in manufacturing knee, hip, ankle, maxillofacial, and spinal prostheses by SLM based on medical imaging instead of casting and forging [2,3].…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Melting of Ti6Al4V-2%Hydroxyapatite Composites: Manufacturing Behavior and Microstructure Evolution

Jaber

Kónya

Kovács

2021

Metals

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In this work, selective laser melting of Ti6Al4V (Ti64) and 2 wt.% hydroxyapatite (HA) composites was performed with the purpose of osseointegration enhancement and biological fixation between implants and bone tissue. The microstructural evolution and mechanical properties were analyzed by using X-ray diffraction (XRD), optical microscopy (OM), a scanning electron microscope (SEM) equipped with (EDX) and (EBSD) systems, microhardness, nanoindentation, and tensile testing. The results showed that the Ti64-2%HA composite components exhibited complicated manufacturing behavior, which could be correlated with the decomposition of HA. The microstructure was found to mainly consist of α Ti with a small amount of HA distributed along grain boundaries. Furthermore, the interaction between Ti64 and HA leading to the formation of Ti3P, TixO, P, and CaTiO3 phases, resulted in poor tensile properties, as compared to pure Ti64 components. Conversely, the tensile properties of SLM Ti64-2%HA composite components were significantly higher than human bone reported previously in the literature.

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Machine-learning assisted optimization of process parameters for controlling the microstructure in a laser powder bed fused WC/Co cemented carbide

Suzuki

Shiba

Ibe³

et al. 2022

Additive Manufacturing

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Microstructure and Hardness Evolution of Solution Annealed Inconel 625/TiC Composite Processed by Laser Powder Bed Fusion

Cited by 14 publications

References 40 publications

Effect of annealing on the microstructure and properties of IN 625 specimens manufactured by selective laser melting

Effect of annealing on the microstructure and properties of IN 625 specimens manufactured by selective laser melting

Selective Laser Melting of Ti6Al4V-2%Hydroxyapatite Composites: Manufacturing Behavior and Microstructure Evolution

Machine-learning assisted optimization of process parameters for controlling the microstructure in a laser powder bed fused WC/Co cemented carbide

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