Microstructural and phase evolutions: Their dependent mechanical and magnetic properties in a Fe-based amorphous alloy during annealing process

Rezaei-Shahreza, P.; Seifoddini, Amir; Hasani, Saeed

doi:10.1016/j.jallcom.2017.12.135

Cited by 29 publications

(15 citation statements)

References 81 publications

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“…[25][26][27] However, optimal manufacturing parameters allow for the production of bulk metallic glasses matrix composites (BMGMCs) that combine amorphous and nanocrystalline structures. [28][29][30] Depending on the manufacturing parameters, these microstructures precipitate in the form of dendrites [31][32][33][34][35][36] or nanoeutectics. [37][38][39][40][41] During this one-step process, the nanocrystalline phase precipitates directly from the liquid state (in situ process), whereas the remaining matrix solidifies in an amorphous phase.…”

Section: Introductionmentioning

confidence: 99%

“…This manufacturing approach was reported for Zr-based, [34,43,44] Ti-based, [45][46][47] Mg-based, [48][49][50] and finally Fe-based [35,36,38,40] alloys. The BMGMCs are characterized by superior mechanical properties in comparison with their amorphous counterparts, i.e., enhanced hardness, [30,51] plastic deformation, [35,37,52] compressive strength [51][52][53] and fracture toughness. [35,54,55] It was reported in several articles that the mechanical and magnetic properties of the manufactured materials are closely related to their microstructure.…”

Section: Introductionmentioning

confidence: 99%

“…[35,54,55] It was reported in several articles that the mechanical and magnetic properties of the manufactured materials are closely related to their microstructure. [30,[56][57][58][59][60][61] Bulk amorphous and nanocrystalline alloys, due to their unique mechanical and/or magnetic properties, are of considerable interest in modern sections of industries, e.g., arms industry, [62] electrotechnical industry, biomedicine and nanotechnology. [63] In recent years, great emphasis has been placed on energy-efficient applications and the reduction of energy losses.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alloying Additions on Microstructure, Mechanical and Magnetic Properties of Rapidly Cooled Bulk Fe-B-M-Cu (M = Ti, Mo and Mn) Alloys

Hasiak

Tkaczyk

Łaszcz

et al. 2021

Metall Mater Trans A

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The influence of alloying additions on the microstructure, mechanical, and magnetic properties of bulk Fe79B20Cu1, Fe79B16Ti4Cu1, Fe79B16Mo4Cu1 and Fe79B16Mn4Cu1 (at. pct) alloys was investigated. Nanocrystalline samples in the form of 3 mm rods were prepared directly by suction casting without additional heat treatment. Mössbauer spectroscopy, transmission electron microscopy and scanning electron microscopy studies confirmed that the investigated alloys consist α-Fe and Fe2B nanograins embedded in an amorphous matrix. The addition of alloying elements, such as Ti, Mo and Mn to Fe79B20Cu1 alloy increases the amount of amorphous phase and decreases the presence of Fe2B phase in all examined alloys. The mechanical properties of the samples, such as hardness, elastic modulus, and elastic energy ratio, were analysed by an instrumented indentation technique performed on a 12 × 12 nanoindentation grid. These tests allowed to characterise the mechanical properties of the regions observed in the same material. For the Fe79B20Cu1 alloy, the hardness of 1508 and 1999 HV, as well as Young’s modulus of 287 and 308 GPa, were estimated for the amorphous- and nanocrystalline-rich phase, respectively. The addition of Ti, Mo, and Mn atoms leads to a decrease in both hardness and elastic modulus for all regions in the investigated samples. Investigations of thermomagnetic characteristics show the soft magnetic properties of the studied materials. More detailed studies of magnetisation versus magnetic field curves for the Fe79B20−xMxCu1 (where x = 0 or 4; M = Ti, Mo, Mn) alloy, recorded in a wide range of temperatures, followed by the law of approach to magnetic saturation revealed the relationship between microstructure and magneto-mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Alloying Additions on Microstructure, Mechanical and Magnetic Properties of Rapidly Cooled Bulk Fe-B-M-Cu (M = Ti, Mo and Mn) Alloys

Hasiak

Tkaczyk

Łaszcz

et al. 2021

Metall Mater Trans A

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“…In recent years, many attempts have been made to generate new amorphous alloys and bulk metallic glasses (BMGs) with better properties and performance [ 1 , 2 , 3 ]. These efforts have led to the design and development of advanced BMGs with special properties such as high strength and hardness [ 4 , 5 , 6 , 7 ], relatively good corrosion resistance [ 8 , 9 , 10 ] and excellent magnetic properties [ 11 , 12 , 13 ]. Today, these materials play an important role in technological innovation because of wide range of their applications [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Isokinetic Analysis of Fe41Co7Cr15Mo14Y2C15B6 Bulk Metallic Glass: Effect of Minor Copper Addition

et al. 2020

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In the present study, (Fe41Co7Cr15Mo14Y2C15B6)100−xCux (x = 0, 0.25 and 0.5 at.%) amorphous alloys were prepared by copper-mold casting. To clarify the effect of the minor addition of copper on the mechanism of nucleation and growth during the crystallization process, an isokinetic analysis was performed. The activation energies (E) of the various crystallization stages were calculated by using theoretical models including Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), Augis–Bennett and Gao–Wang methods. In addition, Augis–Bennett, Gao–Wang and Matusita methods were used to investigate the nucleation and growth mechanisms and to determine other kinetic parameters including Avrami exponent (n), the rate constant (Kp) and dimensionality of growth (m). The obtained results revealed that the activation energy—as well as thermal stability—was changed with minor addition of copper. In addition, the obtained Avrami exponent values were confirmed by Johnson–Mehl–Avrami–Kolmogorov (JMAK) method. The research findings demonstrated that the value of Avrami exponent is changed with minor addition of copper, so that the Avrami exponents of all crystallization stages, except the second peak for copper-free amorphous alloy, were equal to integer values ranging from two to four, indicating that the growth mechanisms were controlled by interface. Moreover, the kinetic parameters of n and b for all peaks were increased by an increase in crystallization temperature, which can be attributed to the increase in the nucleation rate.

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“…A nanocrystalline structure can be obtained by minimising the solidification time of the alloy or by appropriate selection of its chemical composition. The best, and most repeatable, results are obtained by usinga method in which the correct choice of chemical composition of the alloy is the deciding factor [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Structural and Magnetic Properties of Bulk Fe61Co10B20W1Y8−XPtx Alloys through the Partial Substitution of Pt for Y

Pietrusiewicz

Nabiałek

2020

Materials

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This paper presents the results of an investigation into rapidly quenched Fe-based alloys with the chemical formula: Fe61Co10B20W1Y8−xPtx (where x = 3, 4, 5). In these alloys, a small quantity of Pt was added, and the Y content was reduced concurrently. Samples of the aforementioned alloys were injection-cast in the form of plates with the dimensions: 0.5 mm × 10 mm × 10 mm. The resulting structure was examined using X-ray diffractometry (XRD), Mössbauer spectroscopy and scanning electron microscopy (SEM). The results of the structural research reveal that, with a small addition of Pt, areas rich in Pt and Y are created—in which Fe-Pt and Pt-Y compounds, with different crystallographic systems, are formed. It has also been shown that an increase in Pt content, at the expense of Y, contributed to the formation of fewer crystalline phases, i.e., it allowed a material with a more homogeneous structure to be obtained. Magnetic properties of the Fe61Co10B20W1Y8−xPtx (where x = 3, 4, 5) alloy samples were tested using a vibrating sample magnetometer (VSM). The magnetic properties of the investigated materials revealed that the saturation magnetisation increased with increasing Pt content, at the expense of Y. This effect is due to the occurrence of different proportions of crystalline magnetic phases within the volume of each alloy.

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Microstructural and phase evolutions: Their dependent mechanical and magnetic properties in a Fe-based amorphous alloy during annealing process

Cited by 29 publications

References 81 publications

Effect of Alloying Additions on Microstructure, Mechanical and Magnetic Properties of Rapidly Cooled Bulk Fe-B-M-Cu (M = Ti, Mo and Mn) Alloys

Effect of Alloying Additions on Microstructure, Mechanical and Magnetic Properties of Rapidly Cooled Bulk Fe-B-M-Cu (M = Ti, Mo and Mn) Alloys

Isokinetic Analysis of Fe41Co7Cr15Mo14Y2C15B6 Bulk Metallic Glass: Effect of Minor Copper Addition

Evolution of the Structural and Magnetic Properties of Bulk Fe61Co10B20W1Y8−XPtx Alloys through the Partial Substitution of Pt for Y

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