The Effect of Boron and Zirconium on the Structure and Tensile Properties of the Cast Nickel-Based Superalloy ATI 718Plus

Hosseini, Seyed Ali; Abbasi, S.M.; Madar, Karim Zangeneh

doi:10.1007/s11665-018-3372-0

Cited by 12 publications

(7 citation statements)

References 19 publications

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“…The occurrence of these peaks has been attributed to the presence of the MC carbide and Laves phases. With the peaks at approximately 35° and 37.5° 2θ being the MC carbide {111} and Laves phase {0110} reflections respectively (Chen et al, 2019; Hosseini, Abbasi, & Madar, 2018; Mostafa, Picazo Rubio, Brailovski, Jahazi, & Medraj, 2017). The peak at approximately 41° 2θ can be attributed to both the MC carbide (200) and Laves phase (201) reflections.…”

Section: Resultsmentioning

confidence: 99%

Design of a Ni-based superalloy for laser repair applications using probabilistic neural network identification

Markanday

Conduit

et al. 2022

DCE

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A neural network framework is used to design a new Ni-based superalloy that surpasses the performance of IN718 for laser-blown-powder directed-energy-deposition repair applications. The framework utilized a large database comprising physical and thermodynamic properties for different alloy compositions to learn both composition to property and also property to property relationships. The alloy composition space was based on IN718, although, W was additionally included and the limiting Al and Co content were allowed to increase compared standard IN718, thereby allowing the alloy to approach the composition of ATI 718Plus® (718Plus). The composition with the highest probability of satisfying target properties including phase stability, solidification strain, and tensile strength was identified. The alloy was fabricated, and the properties were experimentally investigated. The testing confirms that this alloy offers advantages for additive repair applications over standard IN718.

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Section: Resultsmentioning

confidence: 99%

Design of a Ni-based superalloy for laser repair applications using probabilistic neural network identification

Markanday

Conduit

et al. 2022

DCE

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“…[10] Limited solute exchange between liquid and solid phases promotes eutectic solidification microstructures and deteriorates the creep resistance. [10,11,76] In the solid state, low solid solubility of B in Ni and its affinity to segregate to GBs are well documented. [48,[77][78][79][80][81] Such micro-segregation is driven by changes in the reduction of interfacial free energy (equilibrium segregation) or vacancy annihilation from atom-vacancy complexes (nonequilibrium segregation).…”

Section: Segregationmentioning

confidence: 99%

“…Generally, GB segregation and solubility of Zr in various precipitates have been reported. [40,64,76,111,152,153] During VIM, one important mechanism is "gettering" of S and O to mitigate their harmful effects. [34,154] In combination with C, this may result in the formation of sulfo-carbides, [34] although these phases may not be retained at GBs in cast and wrought Ni-based superalloys.…”

Section: Segregationmentioning

confidence: 99%

“…[10,11,115,116,155] Zr and B both hinder solute exchange between liquid and solid phases, and Zr promotes the formation of γ 0 precipitates. [10,11,76] Thus, homogenization treatments must be adjusted before hot working can be carried out. Solid-state micro-segregation of B, C, and Zr, and impurities may be competitive processes.…”

Section: Processability and Propertiesmentioning

confidence: 99%

“…Generally, GB segregation and solubility of Zr in various precipitates have been reported. [ 40,64,76,111,152,153 ]…”

Section: Zirconiummentioning

confidence: 99%

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Review of Microstructure–Mechanical Property Relationships in Cast and Wrought Ni‐Based Superalloys with Boron, Carbon, and Zirconium Microalloying Additions

et al. 2022

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Cast and wrought Ni‐based superalloys are materials of choice for harsh high‐temperature environments of aircraft engines and gas turbines. Their compositional complexity requires sophisticated thermo‐mechanical processing. A typical microstructure consists of a polycrystalline γ‐matrix, strengthening Ni3(Al,Ti) γ′ precipitates, carbides (MC, M6C, and M23C6), borides (M2B, M3B2, and M5B3), and other inclusions. Microalloying additions of B, C, and Zr commonly improve high‐temperature strength and creep resistance, although excessive additions are detrimental. Grain boundary (GB) segregation may improve cohesion and displace embrittling impurities. Finely dispersed carbides and borides are desired to control grain size via GB pinning. However, excessive decoration of GBs may lead to failure during processing and in‐service. Hence, a systematic review on the roles of B, C, and Zr in cast and wrought Ni‐based superalloys is required. The current state of knowledge on GB segregation and precipitation is reviewed. Experimental and modeling results are compared across various processing steps. The impact of GB precipitation on mechanical properties is most well researched. Co‐precipitation in proximity to GBs interacting with local microstructure evolution and mechanical properties remains less explored. Addressing these gaps in knowledge allows a more complete understanding of processing–microstructure–properties relationships in advanced cast and wrought Ni‐based superalloys.

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Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy

Liu

et al. 2022

J Mater Sci

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The Effect of Boron and Zirconium on the Structure and Tensile Properties of the Cast Nickel-Based Superalloy ATI 718Plus

Cited by 12 publications

References 19 publications

Design of a Ni-based superalloy for laser repair applications using probabilistic neural network identification

Design of a Ni-based superalloy for laser repair applications using probabilistic neural network identification

Review of Microstructure–Mechanical Property Relationships in Cast and Wrought Ni‐Based Superalloys with Boron, Carbon, and Zirconium Microalloying Additions

Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy

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