Amorphous structure rejuvenation under cryogenic treatment of Al-based amorphous-nanocrystalline alloys

Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

“…One can see that the intensity of the reflection corresponding to nanocrystals (curve 5) decreases significantly during cryogenic cycling. The authors of [146,147] did not observe any signs of the crystalline phases with an increase in the treatment duration. So, it was shown that the method of cryogenic rejuvenation actually enables recovering an amorphous structure in partially crystalline alloys, thus increasing the plasticity of a material.…”

“…The idea of induction of stresses in the alloy with the non-uniform distribution of the thermal expansion coefficients turned to be very promising. The use of this method allowed for the observation of a structural change in inhomogeneous amorphous Zr 46 Cu 38 Al 8 Ag 8 alloy [145], as well as completely recovering the amorphous phase in partially crystalline Al 88 Ni 6 Y 6 and Al 87 Ni 8 Gd 5 alloys [146,147]. The authors of the latter work used the idea of increasing the difference in the thermal expansion coefficients due to the formation of a small number of nanocrystals in the amorphous phase and the subsequent cryogenic thermal cycling of a structure consisting of the amorphous phase and Al nanocrystals uniformly distributed over it.…”

Recent Advancements in Metallic Glasses

“…Last years, a new method for recovery of plasticity was found; it is cycling in a temperature range between room or elevated temperature and the temperature of liquid nitrogen [146,147]. The authors of the latter work used the idea of increasing the difference in the thermal expansion coefficients due to the formation of a small number of nanocrystals in the amorphous phase and the subsequent cryogenic thermal cycling of a structure consisting of the amorphous phase and Al nanocrystals uniformly distributed over it.…”

Effect of Deep Cryogenic Activated Treatment on Hemp Stem-Derived Carbon Used as Anode for Lithium-Ion Batteries

“…Cryogenic process is a new type of material processing technology, and more widely used in the metal field currently. Cryogenic treatment can refine metal crystal size to achieve excellent mechanical properties [ 21 – 24 ]. Abrosimova et al investigated the effect of cryogenic treatment on the rejuvenation of the amorphous phase of Al-based alloys [ 21 ].…”

“…Cryogenic treatment can refine metal crystal size to achieve excellent mechanical properties [ 21 – 24 ]. Abrosimova et al investigated the effect of cryogenic treatment on the rejuvenation of the amorphous phase of Al-based alloys [ 21 ]. Li et al explored the effect of cryogenic treatment (CT) on the mechanical properties and microstructure of IN718 superalloy [ 22 ].…”