Ceramic shell moulds for investment casting of low-pressure turbine rotor blisk

Venkat, Y.; Choudary, K.R.; Das, Deepak Kumar; Pandey, Akash; Singh, Sarabjit

doi:10.1016/j.ceramint.2020.10.152

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…The operating temperature in the LPT section is typically below the intensive creep range [ 14 ]. To address this issue, castings generally are modified by adding refiners, which contain highly stable particles, or by introducing an inoculant to the prime coat of the ceramic mold [ 15 , 16 ]. Grain refinement in the primary microstructure is directly related to increased heterogeneous nucleation sites during solidification [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Even if there are several technological methods of casting, sand casting and investment casting methods remain some of the most used technological methods of casting due to the fact that these methods are not very expensive, especially in the case when different types of mixing alloys are required to be rapidly tested or produced [ 15 , 16 ]. The mold made of sand material allows rapid cooling and solidifying of the liquid material that is being cast, the realized product being easily extracted from the mold by braking the ceramic form, post-processing operations being possible to be applied on the realized product in order to improve the surface roughness as well [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Cast Iron Parts Obtained in Ceramic Molds Produced by Binder Jetting 3D Printing—Morphological and Mechanical Characterization

et al. 2021

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Mechanical behavior and characteristics of two different types of materials: cast iron with lamellar graphite EN-GJL-250 and cast iron with spheroidal graphite EN-GJS-400-15 which were cast in ceramic molds using gravitational casting method has considered in this research. The ceramic molds were obtained by 3D printing method. First, a finite element analysis was developed to determine Tresca and von Mises stresses and the deformations of the ceramic molds under an applied pressure of 25 MPa. Samples were produced by gravitational casting using two types of cast iron materials. Mechanical tests were made using samples produced from these two types of materials and microstructure analysis evaluation of fractured zones was realized by scanning electron microscopy. Obtained results were finally used for designing, developing, and producing of one ‘hydraulic block’ of a railway installation by the Benninger Guss company of Switzerland.

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Preparation and analysis of a hybrid ceramic shell for investment casting

Pattnaik

Sutar

2022

Int J Adv Manuf Technol

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Ceramic shell moulds for investment casting of low-pressure turbine rotor blisk

Cited by 7 publications

References 16 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

Cast Iron Parts Obtained in Ceramic Molds Produced by Binder Jetting 3D Printing—Morphological and Mechanical Characterization

Preparation and analysis of a hybrid ceramic shell for investment casting

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