Effect of heat-treatment on the room temperature ductility of an ordered intermetallic Fe–Co–V alloy

Sundar, R.; Deevi, S.C.

doi:10.1016/j.msea.2003.11.004

Cited by 27 publications

(22 citation statements)

References 18 publications

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“…As shown, the stability of c phase increases with V content. These results are in good agreement with the previous publications [2,15,16]. Therefore, the presence of vanadium in the Fe-Co alloys has a significant role in the decrease in transformation temperature (c ?…”

Section: Resultssupporting

confidence: 93%

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Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

Hasani

Shafyei

Shamanian

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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In this study, the allotropic phase transition and its effect on the magnetic behavior of FeCo-7 wt%V alloy were investigated. It was found that c phase is observed in the microstructure in the as-cast condition, and it diminishes after severe cold rolling (90% reduction). After annealing at temperatures higher than 500 up to 750°C, the c phase is observed in the structure, again. But, this phase is disappeared by annealing at temperatures above 750°C due to the formation of vanadium-rich precipitates. Thermocalc software was used in order to elucidate the influence of vanadium percent on the stability of c phase in Fe-Co alloys. Also, magnetic studies showed that the saturation induction is reduced by annealing at temperatures from 500 up to 750°C, which is related to the formation of residual non-magnetic c phase.

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Section: Resultssupporting

confidence: 93%

“…2. It is observed that the retained c phase is diminished after cold rolling and that the microstructure becomes fully a-bcc phase, which is in good agreement with the previous publications [1,2,[14][15][16].…”

Section: Resultssupporting

confidence: 92%

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

Hasani

Shafyei

Shamanian

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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“…Analysis of literary sources shows that the transition from the use of pure ferromagnetic materials to alloys on their basis gives a wide range of compositions with modified properties. [ 5–7 ] When the temperature changes, they form chemical compounds with different structures, which provide the formation of new types of nanostructures with the necessary operational characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)

Saltykov

Shumakova

Pazukha

et al. 2020

Crystal Research and Technology

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The complex investigation of the crystal, diffusion processes, and electrical conductivity of Fe x Co 100−x (0 < x < 100) film alloys and Fe x Co 100−x /Cu/Fe x Co 100−x /Sub three-layer films with a ferromagnetic layer thickness d F = 20-50 nm and a nonmagnetic layer thickness d N = 2-30 nm has been carried out. For both as-deposited and annealed at 700 K films at x = 50, 80 at%, the phase composition corresponds to bcc-Fe x Co 100−x (single-layer films) or bcc-Fe x Co 100−x + fcc-solid solution of Fe and Co atoms that isomorphically replace each other in the Cu lattice (three-layer film). At x = 20 at%, the phase composition of as-deposited single-layer films corresponds to bcc-Fe x Co 100−x + hcp-Co and bcc-Fe x Co 100−x + fcc-Cu + hcp-Co in the case of three-layer films. After heat treatment at 700 K, the phase composition corresponds to bcc-Fe x Co 100−x + fcc-Co (single-layer films) and bcc-Fe x Co 100−x + fcc-s.s. Cu (Fe, Co) (three-layer film). For three-layer samples with d F = 30-50 nm, d N = 10-30 nm, annealing at 700 K does not lead to complete mixing of the layers, their original order is preserved. In the temperature dependence of the resistivity, three characteristic regions, where the various electron scattering mechanisms dominate, are distinguished and grounded.

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“…A very fine microstructure can improve the ductility, which is inversely proportional to the square root of the grain or sub-grain size [11]. Sunder [12] has reported that the stress concentration at the grain boundaries is due to the planar slip of dislocations in the ordered state and can be reduced by refining the grain size, leading to improved ductility in the ordered state. The desired grain size is governed by a suitable selection of annealing temperature, which significantly affects the final properties.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in the elongation, yield strength and magnetic properties of intermetallic FeCo alloy using spark plasma sintering

et al. 2017

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Equiatomic FeCo alloys were densified using spark plasma sintering (SPS). Using a constant 50 MPa pressure, the sintering temperature and dwell times for the SPS process were optimised for different heating rates (50, 100, 300 ºC.min-1). All samples used in this optimisation process were analysed in terms of their mechanical and magnetic properties. Interestingly, for all heating rates, FeCo samples sintered at the highest temperatures (1100 ºC) without dwelling exhibited an increased tensile yield strength combined with an improvement in the elongation to fracture. This occurred despite the microstructural coarsening observed at this sintering temperature, which decreased the ultimate tensile strength. Improved grain boundary bonding in the samples sintered at the highest sintering temperature led to a suppression of intergranular fracture; something previously considered to be inherent to all equiatomic FeCo alloy structures. An optimum combination of mechanical (ultimate tensile strength = 400 MPa, yield strength = 340 MPa and strain to failure = 3.5 %) and magnetic (saturation induction (Bsat) of 2.39 T and coercivity (Hc) of 612 A.m-1) properties was achieved by sintering to 1100 ºC using a relatively slow heating rate of 50 ºC.min-1 with no dwell time.

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Effect of heat-treatment on the room temperature ductility of an ordered intermetallic Fe–Co–V alloy

Cited by 27 publications

References 18 publications

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)

Enhancement in the elongation, yield strength and magnetic properties of intermetallic FeCo alloy using spark plasma sintering

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Effect of heat-treatment on the room temperature ductility of an ordered intermetallic Fe–Co–V alloy

Cited by 27 publications

References 18 publications

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline FexCo100−x/Cu/ FexCo100−x Thin Films (0 < x < 100)

Enhancement in the elongation, yield strength and magnetic properties of intermetallic FeCo alloy using spark plasma sintering

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The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)