Abstract
In the present paper, we consider the effect of severe plastic deformation on the structural state of amorphous tapes of 2НСР alloy obtained by melt spinning. Using X-ray diffraction analysis and differential scanning calorimetry, we studied samples of rapidly quenched tapes of 2НСР alloy in the initial amorphous state and after severe plastic deformation in a Bridgman setup at a quasi-hydrostatic pressure of 2 GPa with a true logarithmic strain e ranging from 7.5 to 8.9. The studies have shown that after severe plastic deformation up to the destruction of the samples of rapidly quenched tapes made of 2НСР alloy, they remain X-ray amorphous. On the differential scanning calorimetry thermograms, an additional peak appears between the first and second heat release peaks after reaching an e value of 8.7. It is suggested that the peak appearance is caused by a change in the initial amorphous phase as a result of deformation, namely, a nanocluster amorphous structure is formed (highly dispersed amorphous clusters separated by amorphous boundaries). In this regard, we can talk about the presence of several types of the amorphous phase differing in topology in the samples after severe plastic deformation with e from 8.7. Taking into account the obtained X-ray patterns of heat-treated samples, it is suggested that one of the types of the amorphous phase formed during the formation of highly dispersed amorphous clusters is enriched with boron. A sign of a change in the amorphous phase during severe plastic deformation in the X-ray patterns of the samples is a narrowing of the amorphous halo width.
Published Version
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