Microstructure and magnetocaloric properties of partially crystallized Gd60Co30Fe10 amorphous alloy prepared by different solidification cooling rates

Zhang, Huiyan; Zhang, Ziyang; Xu, Yafang; Xia, Ailin; Li, Weihuo; Wang, Fachao; Chen, Shuangshuang; Sisó, Gerard

doi:10.1007/s12598-021-01745-w

Cited by 7 publications

(1 citation statement)

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“…It is important to keep in mind that loss of plasticity and ductile-brittle transition temperature Effect of heat treatment on the plasticity ε f of AAs: The difference between the alloys with respect to their ε f dependences is associated with different quenching rates upon their preparation: a higher rate of 2.6 × 10 6 K/c (for the Fe 53.3 Ni 26.5 B 20.2 alloy) leads to a one-stage decrease in plasticity, while a lower rate of 1.0 × 10 6 K/c (for the Co 28.2 Fe 38.9 Cr 15.4 Si 0.3 B 17.2 alloy) leads to two stages of decrease in ε f . It is important to keep in mind that loss of plasticity and ductile-brittle transition temperature in AAs depend on alloy composition, quenching rate, and annealing conditions [34][35][36][37]. In turn, the quenching rate is also related to the maximum thickness of the amorphous alloy formed during production on special equipment for melt quenching.…”

Section: The Phenomenon Of Aa Embrittlementmentioning

confidence: 99%

Mechanical Behavior of Fe- and Co-Based Amorphous Alloys after Thermal Action

Permyakova

Глезер

2022

Metals

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The effect of heat treatment on the structure and mechanical properties of Co-Fe-Cr-Si-B/Fe-Cr-B/Fe-Ni-B amorphous alloys has been studied systematically. Melt-quenching (spinning method) was used for production of investigated amorphous alloys. The transmission electron microscopy (TEM) was used to study the structure transformations. The effect of temperature on deformation behavior (plasticity, microhardness, crack resistance, and the density and average length of shear bands) of the amorphous alloys was studied by bending and microindentation. It is shown that the ductile–brittle transition, which occurs at the stage of structure relaxation in amorphous alloys, is caused by two factors: a decrease in the susceptibility of the amorphous matrix to plastic flow and an abrupt decrease in the resistance to the development of quasibrittle cracks. It is established that the transition to a two-phase amorphous–nanocrystalline state upon annealing leads to substantial strengthening of the alloys and a partial recovery of their plasticity. It is proved that the strengthening of amorphous alloys at the initial stages of crystallization can be initiated by the difference in the elastic moduli of the amorphous matrix and the precipitated nanocrystals, as well as by the specific features of the interaction between nanocrystalline phase particles and shear bands propagating under external actions. It is established that the phenomenon of plasticization in amorphous alloys (the crack resistance can increase after annealing in a certain temperature range) is due to the effective retardation of cracks on nanoparticles.

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Section: The Phenomenon Of Aa Embrittlementmentioning

confidence: 99%