Tetragonal dipole dominated Zener relaxation in BCC-structured Fe-17at.%Ga single crystals

Sun, Meng; Jiang, Weibin; Ke, Yubin; Ge, Binghui; Wang, Xianping; Fang, Qianfeng

doi:10.1016/j.actamat.2023.119245

Cited by 8 publications

(1 citation statement)

References 74 publications

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“…It was found that there were two phase-transition events at 445.4 °C (T OD ) and 693.7 °C (T C ) in the alloy during the heating process from room temperature to 1000 °C. In particular, the preceding occurrence corresponded to the transition between structural order and disorder [56], i.e., the A2 + D0 3 → A2 transition, which was consistent with the XRD analysis. And the latter event corresponded to the magnetic order-disorder transition [57], which was consistent with the Curie temperature of A2 phase structure.…”

Section: Resultssupporting

confidence: 85%

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Yao,

Deng,

Wang

et al. 2024

Phys. Scr.

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Magnetostrictive Fe-Ga alloys, featuring with good machinability, high Curie temperature, and high permeability, have received increasing attention in fields such as actuators, implants, and energy harvesting. Unfortunately, bulk polycrystalline Fe-Ga alloys usually suffer poor magnetostrictive strains compromised by the randomness of grain structure and the intricate phase constitution. The current study was centered on the fabrication of bulk polycrystalline Fe81Ga19 alloys with tailored grain morphology and phase arrangement utilizing laser-beam powder bed fusion (LPBF) technology. Particular emphasis was laid on investigating the repercussions of LPBF process parameters on the microstructure and magnetostrictive performance. The findings illustrated a non-linear interplay between laser power and the relative density of laser powder bed fusion-fabricated (LPBFed) Fe81Ga19 alloys, marked by an initial augmentation followed by a subsequent decrement. Similarly, a consistent trend was observed for the LPBFed alloys at varying scan speeds. In particular, the LPBFed Fe81Ga19 alloys exhibited a highest density at optimized process parameters (laser power set at 120 W paired with a scan speed of 100 mm/s) due to suitable laser energy input during LPBF process. It was experimentally shown that elongated columnar grains and disorder A2 phase structures were obtained within the alloys attibutes to the high temperature gradient and rapid cooling kinetics intrinsic to LPBF, contributing to a desirable magnetostrictive strain of ~87 ppm for bulk polycrystalline Fe81Ga19 alloys. Moreover, a good dynamic magnetostrictive response of the LPBFed alloys was confirmed by the near-synchronous variations between magnetostrictive behavior and alternating magnetic fields. It can be derived from these findings that LPBF process may be a promising method to prepare bulk magnetostrictive Fe-Ga alloys for versatile applications.

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Section: Resultssupporting

confidence: 85%

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Yao,

Deng,

Wang

et al. 2024

Phys. Scr.

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Ultrabroad distribution of multiple anelasticities in O-doped refractory multiprincipal element alloys

Wang,

Sun,

Liu

et al. 2024

Acta Materialia

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High magneto-mechanical hysteresis-type damping in FeGaMo alloys

Liu,

Sun,

Liu

et al. 2023

Journal of Alloys and Compounds

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Tetragonal dipole dominated Zener relaxation in BCC-structured Fe-17at.%Ga single crystals

Cited by 8 publications

References 74 publications

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Ultrabroad distribution of multiple anelasticities in O-doped refractory multiprincipal element alloys

High magneto-mechanical hysteresis-type damping in FeGaMo alloys

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Tetragonal dipole dominated Zener relaxation in BCC-structured Fe-17at.%Ga single crystals

Cited by 8 publications

References 74 publications

Laser-beam powder bed fusion of magnetostrictive Fe81Ga19 alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Laser-beam powder bed fusion of magnetostrictive Fe81Ga19 alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Ultrabroad distribution of multiple anelasticities in O-doped refractory multiprincipal element alloys

High magneto-mechanical hysteresis-type damping in FeGaMo alloys

Contact Info

Product

Resources

About

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties

Laser-beam powder bed fusion of magnetostrictive Fe₈₁Ga₁₉ alloys: parameter optimization, microstructural evolution and magnetostrictive properties