Equal channel angular extrusion for bulk processing of Fe–Co–2V soft magnetic alloys, part I: Processing and mechanical properties

Susan, D. F.; Jozaghi, Taymaz; Караман, И.; Rodelas, Jeffrey

doi:10.1557/jmr.2018.142

Cited by 13 publications

(9 citation statements)

References 23 publications

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“…Finally, we would like to discuss the magnetostriction and UTS of annealed Fe 29 Co 71 wire compared with the other magnetostrictive materials based on the earlier results. Figure 10 shows these characteristics with common Fe-based magnetostrictive materials such as Fe-Co system, Fe-Ga system, Fe-Al, and Tb-Dy-Fe alloys [8][9][10][11][12][13][15][16][17][18] reported so far. In general, there is a trade-off relationship between the amount of magnetostriction and the strength of Fe-based magnetostrictive alloys.…”

Section: Out = V W Output By Cyclic Compression Testmentioning

confidence: 99%

“…Supporting Information is available from the Wiley Online Library or from the author. Fe-Co-V [15], [16] Fe-Co [17], [18] Fe-Ga [8] Fe-Ga-B [9] Fe-Ga-Tb [10] Fe-Ga-Zr-C [11] Fe-Al [12] Tb-Dy-Fe [6] 893 K-annealing Figure 10. Summary of measured magnetostriction and UTS for Fe 29 Co 71 wire in this study and common Fe-based magnetostrictive alloys.…”

Section: Supporting Informationmentioning

confidence: 99%

“…Mashiyama and Furuya et al found that Co‐rich Fe 1‐ x Co x alloys ( x = 50–90 at%) have excellent magnetostrictive and mechanical properties . Yamaura et al demonstrated larger magnetostriction of 128 ppm along the rolling direction in an Fe 25 Co 75 alloy by cold rolling (rolling rate of ≈97%) compared with the other composition in Fe–Co system.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires

et al. 2020

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Vibratory power generation technology using the inverse magnetostriction effect, which is a magnetic flux change induced by stress, in ferromagnetic materials has attracted significant attention. Recently, polycrystalline magnetostrictive alloys with a combination of high stiffness and strength and large magnetostriction have become desirable for various smart applications, such as energy harvesters [1] and microscale sensors [2] and actuators. [3] However, the current understanding of the microstructure-property relationship of magnetostrictive materials is still limited due to the complexity of their grain geometry, multi-objective design requirements, and the lack of experimental verifications. [4,5] In 1965, Clark et al. [6] reported that Tb-Dy-Fe alloy (Terfenol-D) exhibits excellent magnetostriction (%1600 ppm), a large generated force (%30 000 N), and high responsiveness (%40 μs). Magnetostrictive alloys have been widely used as actuators, but the scope of engineering applications is limited because of the brittleness in Terfenol-D. In 2000, Fe-Ga-Al alloy (Galfenol) attracted attention for its excellent magnetostrictive properties and rigidity. [7-10] Many studies focus on the addition of third elements or controlling the nanostructure. Wu et al. [11] reported that the addition of the rare-earth element Tb exhibited large magnetostriction (400 ppm) and good strength (400 MPa). Recently, Na et al. [12] developed Fe-Al alloy (Alfenol) with a strong <100> orientation in the roll direction that showed good magnetostriction (%200 ppm) and tensile strength (606 MPa). Thus, it is speculated that the magnetostriction and mechanical properties of magnetostrictive materials show a contradictory relationship; that is, there are some difficulties in improving both characteristics simultaneously. Mashiyama [13] and Furuya et al. [14] found that Co-rich Fe 1-x Co x alloys (x ¼ 50-90 at%) have excellent magnetostrictive and mechanical properties. [15-18] Yamaura et al. [19] demonstrated larger magnetostriction of 128 ppm along the rolling direction in an Fe 25 Co 75 alloy by cold rolling (rolling rate of %97%) compared with the other composition in Fe-Co system. These Co-rich Fe-Co alloys have been gradually used commercially because they are easy to transform into any shape for applications. [20-25] Thus, the composition of Fe 29 Co 71 seems to be superior to the other composition in the viewpoint of magnetostrictive and mechanical characteristics in Fe-Co system. [13,19] These characteristics are preferred to be the applications of mechanical sensors or energy harvesters assumed in an industrial environment.

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Section: Out = V W Output By Cyclic Compression Testmentioning

confidence: 99%

Section: Supporting Informationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires

et al. 2020

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“…Due to the nature of the deformation processes, significant microstructure and property gradients can develop between the outside and the center of the bar, which is a drawback of conventional bar manufacturing methods. 29…”

Section: Bar Processingmentioning

confidence: 99%

“…In addition to the studies by Weißner, Korshunov, and Wu on low-cobalt alloys, recent investigations by Susan and Kustas et al were performed on 49Fe-49Co-2V alloy, known commercially as Hiperco 50A. 29,[53][54][55] Unlike low-cobalt alloys, Fe-Co compositions close to 50Fe-50Co are ordered intermetallic alloys with low ductility at room temperature. Therefore, ECAE processing was performed at high temperatures in the disordered BCC state (above $ 730°C) to preclude widespread cracking during extrusion.…”

Section: Equal-channel Angular Extrusionmentioning

confidence: 99%

Emerging Opportunities in Manufacturing Bulk Soft-Magnetic Alloys for Energy Applications: A Review

Kustas

Susan

Monson

2022

JOM

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Soft-magnetic alloys exhibit exceptional functional properties that are beneficial for a variety of electromagnetic applications. These alloys are conventionally manufactured into sheet or bar forms using well-established insgot metallurgy practices that involve hot- and cold-working steps. However, recent developments in process metallurgy have unlocked opportunities to directly produce bulk soft-magnetic alloys with improved, and often tailorable, structure–property relationships that are unachievable conventionally. The emergence of unconventional manufacturing routes for soft-magnetic alloys is largely motivated by the need to improve the energy efficiency of electromagnetic devices. In this review, literature that details emerging manufacturing approaches for soft-magnetic alloys is overviewed. This review covers (1) severe plastic deformation, (2) recent advances in melt spinning, (3) powder-based methods, and (4) additive manufacturing. These methods are discussed in comparison with conventional rolling and bar processing. Perspectives and recommended future research directions are also discussed.

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