Theoretical investigation of the crystallographic structure, anisotropic elastic response, and electronic properties of the major borides in Ni-based superalloys

Xia, Fangfang; Sangid, Michael D.; Xiao, Yao; Gong, Xiaoguo; Gang, Tieqiang; Chen, Lijie; Xu, Weiwei

doi:10.1080/14786435.2020.1714089

Cited by 3 publications

(3 citation statements)

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“…[28,65] During long-term exposure, M 2 B borides are considered to be stable against decomposition by first-principles calculations, thermo-kinetic modeling, and experimental observations. [40,81,102] M 3 B 2 and M 5 B 3 borides are more commonly reported in Ni-based superalloys. [29,30,39,50,[103][104][105] Mo-rich M 3 B 2 borides have a D5 a tetragonal crystal structure (see Figure 3c) that can be constituted by the general L 2 SB 2 structure where L represents elements with larger atomic radii such as W, Mo, and Ti, while S represents elements with smaller atomic radii such as Cr, Co, and Ni.…”

Section: Segregationmentioning

confidence: 99%

“…First‐principles calculations by Sanyal et al [ 37 ] also showed that the susceptibility to oxygen‐induced GB embrittlement was lower at Cr 5 B 3 /Ni interfaces. [ 37 ] Xia et al [ 102 ] calculated the shear moduli, Young's moduli, and hardness for the above‐mentioned borides. Generally, a trend of M 3 B 2 > M 5 B 3 > M 2 B is followed for elements substituting M as Cr > W > Mo.…”

Section: Boronmentioning

confidence: 99%

“…[ 28,65 ] During long‐term exposure, M 2 B borides are considered to be stable against decomposition by first‐principles calculations, thermo‐kinetic modeling, and experimental observations. [ 40,81,102 ]…”

Section: Boronmentioning

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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Section: Segregationmentioning

confidence: 99%

Section: Boronmentioning

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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Grain boundary microstructure-property relationships in the cast & wrought Ni-based superalloy René 41 with boron and carbon additions

et al. 2023

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Influence of P Content on Microstructure and Texture Evolution of the Oxygen-Free Copper

Peng

Song

Zhou

et al. 2022

Metals

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The present work aims to systematically investigate the influence of P content on the microstructure and texture evolution of oxygen-free copper during intermediate annealing and final cold rolling. The microstructure and texture evolution were studied by electron backscattered diffraction and transmission electron microscopy. With the addition of P, the grains refined and a large fraction of low angle grain boundaries (LAGBs) emerged after intermediate annealing. The texture transformed from pure metal type for pure Cu to the α-fiber texture which included brass and Goss texture as P was added. The recrystallization temperature increased with the addition of P, and refined grains after the final cold rolling process. The addition of elemental P would reduce the stacking fault energy, and then influence the transformation of the deformation and recrystallization texture of the copper. Accompanied by the evolution of the deformation texture, the recrystallization cubic texture {001}<100> was suppressed and a strong {236}<385> brass recrystallization texture emerged with the addition of elemental P after the intermediate annealing and subsequent final cold rolling process.

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Theoretical investigation of the crystallographic structure, anisotropic elastic response, and electronic properties of the major borides in Ni-based superalloys

Cited by 3 publications

References 44 publications

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

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

Grain boundary microstructure-property relationships in the cast & wrought Ni-based superalloy René 41 with boron and carbon additions

Influence of P Content on Microstructure and Texture Evolution of the Oxygen-Free Copper

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