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Stability of an Amorphous TiCuNi Alloy Subjected to High‐Pressure Torsion at Different Temperatures
Author(s) -
Gunderov Dmitry,
Slesarenko Viacheslav,
Lukyanov Alexander,
Churakova Anna,
Boltynjuk Evgeniy,
Pushin Vladinir,
Ubyivovk Evgeniy,
Shelyakov Alexander,
Valiev Ruslan
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500216
Subject(s) - materials science , alloy , annealing (glass) , crystallization , torsion (gastropod) , amorphous solid , amorphous metal , metallurgy , crystallography , chemical engineering , chemistry , medicine , surgery , engineering
The amorphous melt‐spun (MS) Ti 50 Ni 25 Cu 25 alloy is subjected to high‐pressure torsion (HPT) at temperatures of 20‐150 °C. The bright‐field (BF) TEM images of the alloy change as a result of HPT processing, the view of the bright‐field image depends on the temperature of HPT processing. HPT processing leads to a decrease in the energy of structural relaxation during heating up to 400 °C, in comparison with the initial MS ribbons. The temperature of crystallization of the MS Ti 50 Ni 25 Cu 25 alloy decreases after HPT processing by 40–20 °C (depends on the temperature of HPT processing). In the MS Ti 50 Ni 25 Cu 25 alloy, HPT processing and subsequent annealing produces noticeably finer grains than annealing at 450 °C of the initial MS alloy. Consequently, HPT processing alters the crystallization kinetics of the MS Ti 50 Ni 25 Cu 25 alloy.