Effects of Zr and Co on the microstructure and mechanical properties of NiAl-based alloys

Wang, Dongjun; Liang, Ying Chun; Ning, Hanwei; Wang, Bao

doi:10.1016/j.jallcom.2021.160815

Cited by 15 publications

(11 citation statements)

References 28 publications

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“…% of Co. The trend of the thermomechanical properties predicted is similar to those obtained during experiments [1]. Hence, computational-based simulation is a cost-effective way of determining the properties of new alloys prior to their manufacturing in the laboratory.…”

Section: Discussionsupporting

confidence: 74%

“…The quest to enhance the thrust-weight ratio of aircraft engines and thus, improve the performance of such engines has called for the development and use of lightweight materials with high-temperature resistant properties for the fabrication of engine components such as the turbine blades in the engine of aircraft [1,2]. In view of this, low-density NiAl-based alloys with approximately 2/3 the density of nickel-based alloy [3] are now being used as a replacement for nickel-based alloys in structural materials.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of the effects of Zr and Co addition on the properties of NiAl-Mo(Cr) alloy

Salifu

Olubambi

2022

MATEC Web Conf.

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The introduction of computational modelling during alloy development has significantly reduced the cost of production and the prolonged time spent by researchers doing trials and errors in the laboratory. In this study, computational software (JMat Pro) was used to simulate the effect of the addition of Zr and Co, on the material properties of NiAl-Mo(Cr) alloy such as the elastic modulus, hardness, thermal conductivity, bulk modulus and specific heat capacity. A significant improvement in the mechanical properties was observed in the developed alloys as compared to those without Zr and Co. Also, the addition of as low as 0.5 at. % Zr and 1.0 at. % Co to NiAl-Cr(Mo) resulted in improved compressive strength and plasticity of the alloy.

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Section: Discussionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Simulation of the effects of Zr and Co addition on the properties of NiAl-Mo(Cr) alloy

Salifu

Olubambi

2022

MATEC Web Conf.

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“…The B2-ordered body center structures give way to the L21 structures during the Heusler phase. The Heusler phase is more ordered than NiAl in terms of ordering [28]. NiAl-Mo alloy has a melting point (1718 K) greater than the Heusler phase (1623 K).…”

Section: Depictsmentioning

confidence: 97%

“…2, the 0.5 % Zr addition refines the NiAl-9Mo alloy's coarse eutectic cell structure. Comparing the hardness of various NiAl-9Mo-xZr alloys, the as-cast A2 alloy has the maximum hardness because of the synergistic impact of the solid solution strengthening of Zr atoms and the second-phase strengthening of Heusler phases on the precipitation strengthening action of Mo particles on dislocation pinning [28][29][30]. Mo phases in the NiAl eutectic cells dissolve more readily as Zr concentration increases, which reduces the Mo phase's ability to enhance precipitation.…”

Section: Depictsmentioning

confidence: 99%

“…The characteristics of the NiAl alloy are significantly influenced by the preparation procedure. The most popular process for creating NiAl alloy is arc smelting, but because of the coarse grain size causing by the slower cooling rate, NiAl alloy has a lower fracture strength [22,23]. The suction cast- ing method draws high-temperature metal liquid from the molten pool into the water-cooled copper crucible through pressure differential, achieves rapid solidification or quasi-rapid solidification through quick cooling by changing the lamellar orientation or refining the lamellae, which is a novel technique for making high--temperature structural materials that has emerged in the recent year [24].…”

Section: Introductionmentioning

confidence: 99%

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Optimizing microstructure and mechanical properties of NiAl-9Mo alloy by Zr addition and suction casting process

Li¹,

Zhu²,

Qi³

et al. 2022

kovmat

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In the present work, NiAl-9Mo alloys with different addition of Zr were prepared by water--cooled copper mold and suction casting, respectively, and the influence on the microstructure and properties of the alloys was discussed. The results show that the microstructure of the as-cast NiAl-9Mo-xZr (x = 0.5, 1.0, 1.5) alloys is a typical eutectic cell structure, with Ni2AlZr (Heusler) phases discontinuously distributed in the cell boundaries. The eutectic cells of NiAl--9Mo-1Zr alloy prepared by the suction casting process are refined, and the average eutectic lamella thickness is about 3 µm. The microhardness of the suction-cast NiAl-9Mo-1Zr alloy is 630.0 HV, which is higher than that of the as-cast alloy (396 HV). The high-temperature compressive strength of the as-cast NiAl-9Mo-1Zr alloy is higher than that of the as-cast alloy, which reaches 350 MPa at 1273 K, due to the joint action of fine grain strengthening and the second phase strengthening of the Heusler phase.

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Effect of Copper on Microstructure and Performance of WC/NiAl/TiC Composite Coatings by Laser Cladding

Zhou,

Huang,

Liang

et al. 2024

Adv Eng Mater

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Intermetallic compounds with special physical and chemical properties are considered to be advanced materials. However, the brittleness at room temperature of intermetallic compounds leads to poor performance, which limits its widespread application in engineering. The objective of this study is to investigate the strengthening mechanism of the copper (Cu) on the microstructure and material performance of WC/NiAl/TiC composite coatings by the laser cladding process. The results reveale that Cu element has a significant effect on the microstructure evolution of the coatings by inhibiting coarse crystal formation. The refined microstructure of the layer had been realized. X‐ray diffraction (XRD) analysis demonstrate a reduction in lattice spacing within the composite coating structure as the proper Cu is added. Furthermore, the addition of Cu contributed to an enhancement in microhardness (868.9 HV0.2) and wear resistance. With 3% copper been added, the wear loss of the coatings has been reduced by 81.13% and the average microhardness value has been increased by 1.4 times as well. Moreover, the chemical metallurgical bond is produced between the particles and bonding phase resulting in strengthened compactness within the layer acting as a physical barrier‐like film that increases polarization resistance.

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Effects of Zr and Co on the microstructure and mechanical properties of NiAl-based alloys

Cited by 15 publications

References 28 publications

Simulation of the effects of Zr and Co addition on the properties of NiAl-Mo(Cr) alloy

Simulation of the effects of Zr and Co addition on the properties of NiAl-Mo(Cr) alloy

Optimizing microstructure and mechanical properties of NiAl-9Mo alloy by Zr addition and suction casting process

Effect of Copper on Microstructure and Performance of WC/NiAl/TiC Composite Coatings by Laser Cladding

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