Structural Aspects of Deformational Amorphization of Ti{sub 50}Ni{sub 25}Cu{sub 25} Crystalline Alloy under High Pressure Torsion

Journal Article · Fri Jun 15 04:00:00 EDT 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S106378341806032X· OSTI ID:22770957

Shalimova, A. V.; Glezer, A. M. ^[1]; Pechina, E. A. ^[2]; Gorshenkov, M. V. ^[3]

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1. Bardin Central Research Institute for Ferrous Metallurgy (Russian Federation)
2. Ural Branch of Russian Academy of Sciences, Physical-Technical University (Russian Federation)
3. National Research Technological University (MISIS) (Russian Federation)

The evolution of the structure of the Ti50Ni25Cu25 crystalline alloy during high-pressure torsion at room temperature has been studied. The torsional moment variation curve as a function of the strain value was fixed in situ, which allowed directly observing the transition of the material from the crystalline state to the amorphous state during the HPT. It was found that the amorphization of the material in the course of the HPT begins on the grain boundaries and fragments of the crystalline phase. Amorphized boundaries form a “grain-boundary carcass” in the cells of which the high-defect nanocrystalline phase is formed. Growth of deformation leads to broadening of the “grain-boundary carcass,” loss of stability of the crystalline phase, and, as a consequence, to the phase transition “crystal → amorphous” state.

• OSTI ID: 22770957
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 6 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
AMORPHOUS STATE
COPPER COMPOUNDS
DEFECTS
DEFORMATION
GRAIN BOUNDARIES
LOSSES
NANOSTRUCTURES
NICKEL COMPOUNDS
PHASE TRANSFORMATIONS
STABILITY
STRAINS
TEMPERATURE RANGE 0273-0400 K
TERNARY ALLOY SYSTEMS
TITANIUM COMPOUNDS
TORSION