Microstructure and mechanical properties of spark plasma sintered nanocrystalline Ni3Al-xB (0.0&lt;x&lt;1.5 at%) alloy

Mohammadnejad, Ali; Bahrami, Abbas; Sajadi, M.; Karimi, Paria; Fozveh, H.R.; Mehr, M. Yazdan

doi:10.1016/j.mtcomm.2018.09.002

Cited by 30 publications

(8 citation statements)

References 27 publications

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“…This indicates that the material may exhibit reduced mechanical properties at elevated sintering temperatures even when high density and low porosity are attained due to rapid grain growth. The advantages of SPS, such as lower sintering temperature and shorter consolidation, have aided the development of nanostructured materials compared to conventional processing routes [ [76] , [77] , [78] ].…”

Section: Sintering Parametersmentioning

confidence: 99%

Sintering of nanocrystalline materials: Sintering parameters

Babalola

Ayodele

Olubambi

2023

Heliyon

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Section: Sintering Parametersmentioning

confidence: 99%

Sintering of nanocrystalline materials: Sintering parameters

Babalola

Ayodele

Olubambi

2023

Heliyon

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“…Compared with nickel-based single crystal alloy, Ni 3 Al-based single crystal alloy has the advantages of low density, high melting point, large specific strength, high plasticity, low cost, long service life, good mechanical properties at high temperature, and strong oxidation resistance. Therefore, the research and development on Ni 3 Al-based single crystal alloys have been becoming a research hotspot in the field of high-temperature structural materials [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C

Jiang

Dou

2020

International Journal of Photoenergy

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Ni3Al-based single crystal alloy IC6SX was prepared by seed crystal method. The effect of different stress conditions on creep behavior of this alloy at 980°C was investigated. The results showed that the creep life of this alloy at 980°C decreased significantly with the increase of stress. When the stress increased from 180 MPa to 230 MPa, the creep life dropped from 245.5 h to 69.3 h, and the steady-state creep rate increased slightly but not significantly. Meanwhile, the morphology of γ ′ phase and dislocation after creep were studied. The results showed that with the increase of stress, the density of dislocations in the γ ′ phase increased gradually, the strength of this alloy decreased gradually, so the creep life decreased significantly. The Y-NiMo phase resolved from the γ phase decreased gradually as the creep life decreased. The creep experiment of the alloy was carried out at 980°C. Due to the higher temperature, the diffusion of atoms in this alloy became faster. Deformation was not only caused by the slippage of dislocations in the crystal but also by the diffusion of atoms. Therefore, the creep mechanism of single crystal alloy IC6SX at this temperature is a mixed mechanism of dislocation glide and diffusion.

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“…An alternative approach would be making a composite from Ni 3 Al and an alloy which has a higher ductility. Nickel, for instance, is an optimum candidate given that it has comparatively much higher ductility [2,3]. A variety of different techniques, including magnetron sputtering techniques and electron beam physical vapor deposition (EB-PVD), have been used to synthesize Ni/Ni 3 Al multi-layer composites [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Towards a high strength ductile Ni/Ni3Al/Ni multilayer composite using spark plasma sintering

2019

Self Cite

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This paper is an attempt to develop an innovative high strength and ductile Ni/Ni3Al/Ni multilayer composite, using spark plasma sintering (SPS). Ni 3 Al powders were first synthesized by mechanical alloying of elemental pure Ni and Al powders. The synthesized intermetallic powders were then mixed with Ni powders in a way that a Ni/Ni 3 Al/Ni multilayer composite can be achieved. Scanning electron microscope, optical microscope, energy dispersive X-ray spectroscopy (EDS), microhardness, and shear punch tests were used to characterize microstructure and mechanical properties of the synthesized composite. Results show that a rather sharp interface with a perfect metallurgical bonding has formed at the Ni/Ni 3 Al joint. The synthesized multilayer composite has a perfect combination of strength and ductility. The maximum shear strength of Ni/Ni 3 Al/Ni multi-layer composite is significantly higher than that of Ni 3 Al, while its ductility is comparable to that of pure Ni.

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Microstructure and mechanical properties of spark plasma sintered nanocrystalline Ni3Al-xB (0.0<x<1.5 at%) alloy

Cited by 30 publications

References 27 publications

Sintering of nanocrystalline materials: Sintering parameters

Sintering of nanocrystalline materials: Sintering parameters

Effect of Stress on Creep Behavior of Single Crystal Alloy IC6SX at 980°C

Towards a high strength ductile Ni/Ni3Al/Ni multilayer composite using spark plasma sintering

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