Microstructural and mechanical characterization of as-cast nickel-based superalloy (IN-713C)

Moreira, Marcelo Ferreira; Fantin, Luiza; Neto, Flávio Beneduce; Azevedo, César Roberto de Farias

doi:10.1007/s40962-020-00540-0

Cited by 13 publications

(3 citation statements)

References 60 publications

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“…One of the ternary eutectic transformations leading to Ni 7 Zr 2 formation is L → γ + Ni 7 Zr 2 + Ni 5 Zr. However, the presence of Ni 5 Zr was not detected in Inconel 713C ® by other authors [40,41]. Similar findings confirming the Ni 7 Zr 2 phase have been reported for Inconel 939 ® [42] and Inconel 738 ® [43].…”

Section: Macro-and Microstructure Of the As-cast Inconel 713c ® Castingssupporting

confidence: 89%

The Effect of CoAl2O4 as a Nucleating Agent and Pouring Temperature on the Microstructure and Properties of Inconel 713C® Nickel-Based Superalloy Castings

Cygan

Rakoczy

2023

Materials

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In this work, three melt-pouring temperatures (1450 °C, 1480 °C, 1520 °C) and CoAl2O4 inoculant contents in the shell mold’s primary coating (0 wt%, 5 wt%, and 10 wt%) were selected to study microstructural and mechanical property changes of the Inconel 713C® nickel-based superalloy. The castings’ phase transformation temperatures, phase constitution, microstructure, and mechanical properties at room and elevated temperatures were investigated via thermodynamical simulations, differential thermal analysis, light and scanning electron microscopy, energy-dispersive X-ray spectroscopy, and tensile and stress-rupture tests. The pouring temperature and inoculant content strongly influenced the mean equiaxed grain size, which ranged between 2.36 and 6.55 mm. The primary microstructure of Inconel 713C® castings, owing to its complex chemical composition, comprised multiple phases, including γ, γ’, MC, M3B2, and Ni7Zr2. The mean size of γ’ was in the 0.446–0.613 μm range, depending on the casting variant. Grain refinement with CoAl2O4 at ambient temperature for each melt-pouring temperature led to increased yield strength (YS) and ultimate tensile strength (UTS). YS was in the range of 775–835 MPa, while UTS was in the range of 868–1010 MPa. A reverse trend was observed in samples that crept in 982 °C/152 MPa, while for each variant, the time to rupture exceeded 30 h. The maximum time to rupture was 46.1 h obtained in the unmodified casting poured at 1480 °C.

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Section: Macro-and Microstructure Of the As-cast Inconel 713c ® Castingssupporting

confidence: 89%

The Effect of CoAl2O4 as a Nucleating Agent and Pouring Temperature on the Microstructure and Properties of Inconel 713C® Nickel-Based Superalloy Castings

Cygan

Rakoczy

2023

Materials

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“…There are numerous methods to study the different mechanisms of fatigue phenomena, which are reflected in the increasing number of fatigue testing approaches for the most critical cases (McDowell 1989;Berto and Zappalorto 2011;Martins et al 2020;Moreira et al 2020;Mendes et al 2020). The failure element on the fracture surface depends on the material type and the loading conditions under which it is subjected during its lifetime (Carpinteri et al 2002;Faszynka et al 2016;Branco et al 2018;Correia et al 2018;He et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Fracture surface formation of notched 2017A-T4 aluminium alloy under bending fatigue

Macek

2021

Int J Fract

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The effect of cyclic loading on facture surface topology in notched components made by aluminium alloys is not completely clear. Fractography and fracture mechanics can help to understand this interdependency. This paper aims to study the distribution of the fracture surface roughness of notched 2017A-T4 aluminium alloy after bending fatigue using an optical focus-variation surface measurement technique by applying the fracture zone concept. The effects of stress level at the notch root and the load ratio on fatigue crack growth and fracture surfaces are analysed. Profile and areal surface parameters of four fracture surface regions were investigated at incremental crack lengths of the specimens. Studies have confirmed that the surface areas associated with the main stages of fatigue phenomenon (i.e. crack initiation, crack propagation, and final rupture) have significant differences in roughness which can be explained by the different loading scenarios. Overall, fatigue fracture surfaces have smallest roughness values at the crack initiation stage and a gradual increase during the fatigue crack growth stage.

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“…Two types of structure were selected for testing within the research, namely, Gyroid (G) and Gyroid + Gyroid (GG) with volume ratios of Vr = 10, 15, and 20 %. The specimens were produced from EOS nickel alloy IN718 (Inconel 718) powder with a generic particle size distribution of 20-55 µm, which chemical composition, listed in Table 1, corresponding to UNS N07718, AMS 5662, AMS 5664, W.Nr 2.4668, DIN NiCr19Fe19NbMo3 [44,45]. Inconel 718 is a nickel-based alloy with exceptional properties and technical specifications.…”

Section: Characteristics Of the Investigated Samplesmentioning

confidence: 99%

Effect of Crosshead Speed and Volume Ratio on Compressive Mechanical Properties of Mono- and Double-Gyroid Structures Made of Inconel 718

et al. 2023

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The current development of additive technologies brings not only new possibilities but also new challenges. One of them is the use of regular cellular materials in various components and constructions so that they fully utilize the potential of porous structures and their advantages related to weight reduction and material-saving while maintaining the required safety and operational reliability of devices containing such components. It is therefore very important to know the properties of such materials and their behavior under different types of loads. The article deals with the investigation of the mechanical properties of porous structures made by the Direct Metal Laser Sintering (DMLS) of Inconel 718. Two types of basic cell topology, mono-structure Gyroid (G) and double-structure Gyroid + Gyroid (GG), with material volume ratios of 10, 15 and 20 %, were studied within our research to compare their properties under quasi-static compressive loading. The testing procedure was performed at ambient temperature with a servo-hydraulic testing machine at three different crosshead testing speeds. The recorded data were processed, while the stress–strain curves were plotted, and Young’s modulus, the yield strength Re0.2, and the stress at the first peak of the local maximum σLocMax were identified. The results showed the best behavior under compression load among the studied structures displayed by mono-structure Gyroid at 10 %. At the same time, it can be concluded that the wall thickness of the structure plays an important role in the compressive properties but on the other hand, crosshead speed doesn´t influence results significantly.

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Microstructural and mechanical characterization of as-cast nickel-based superalloy (IN-713C)

Cited by 13 publications

References 60 publications

The Effect of CoAl2O4 as a Nucleating Agent and Pouring Temperature on the Microstructure and Properties of Inconel 713C® Nickel-Based Superalloy Castings

The Effect of CoAl2O4 as a Nucleating Agent and Pouring Temperature on the Microstructure and Properties of Inconel 713C® Nickel-Based Superalloy Castings

Fracture surface formation of notched 2017A-T4 aluminium alloy under bending fatigue

Effect of Crosshead Speed and Volume Ratio on Compressive Mechanical Properties of Mono- and Double-Gyroid Structures Made of Inconel 718

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