Abstract
Structure formation in Ti-48.5, Ti-50.0, Ti-50.7 at.% Ni and Ti-47 at.% Ni-3 at.% Fe shape memory alloys depending on deformation temperature (-196 to 400 deg C) and pressure (4-8 GPa) under conditions of high-pressure torsion and post-deformation annealing (200-400 deg C) was studied using transmission electron microscopy and X-ray diffraction methods. The tendency to form an amorphous structure depends on the relative values of the deformation temperature and martensite start (M {sub s}) temperature as follows: it is strongest in initially martensitic alloy, intermediate in a premartensitic austenite, and the weakest in initially thermally stable austenitic alloy. Lowering of the deformation temperature in the range below the martensite finish (M {sub f}) temperature facilitates amorphization. Raising of the deformation temperature in the austenitic temperature range suppresses amorphization. The upper limiting deformation temperature for partial amorphization of the alloy having the highest M {sub s} is located about 300 deg C. The upper limiting deformation temperature for actually nanocrystalline structure formation is located about 350 deg C for non-aging Ti-Ni alloys and somewhat higher than 400 deg C for aged Ti-Ni alloy. The thermomechanical conditions of the equal-channel angular pressing for obtaining actually nanocrystalline structure are recommended. Isothermal martensitic transformation is
More>>
Prokoshkin, S D;
[1]
Khmelevskaya, I Yu;
[1]
Dobatkin, S V;
[1]
Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)];
Trubitsyna, I B;
[1]
Tatyanin, E V;
[2]
Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)];
Stolyarov, V V;
[3]
Prokofiev, E A
[3]
- Moscow State Institute of Steel and Alloys, Leninsky prosp., 4, Moscow 119049 (Russian Federation)
- Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)
- Institute of Physics of Advanced Materials, Ufa (Russian Federation)
Citation Formats
Prokoshkin, S D, Khmelevskaya, I Yu, Dobatkin, S V, Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)], Trubitsyna, I B, Tatyanin, E V, Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)], Stolyarov, V V, and Prokofiev, E A.
Alloy composition, deformation temperature, pressure and post-deformation annealing effects in severely deformed Ti-Ni based shape memory alloys.
United Kingdom: N. p.,
2005.
Web.
doi:10.1016/j.actamat.2005.02.032.
Prokoshkin, S D, Khmelevskaya, I Yu, Dobatkin, S V, Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)], Trubitsyna, I B, Tatyanin, E V, Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)], Stolyarov, V V, & Prokofiev, E A.
Alloy composition, deformation temperature, pressure and post-deformation annealing effects in severely deformed Ti-Ni based shape memory alloys.
United Kingdom.
https://doi.org/10.1016/j.actamat.2005.02.032
Prokoshkin, S D, Khmelevskaya, I Yu, Dobatkin, S V, Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)], Trubitsyna, I B, Tatyanin, E V, Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)], Stolyarov, V V, and Prokofiev, E A.
2005.
"Alloy composition, deformation temperature, pressure and post-deformation annealing effects in severely deformed Ti-Ni based shape memory alloys."
United Kingdom.
https://doi.org/10.1016/j.actamat.2005.02.032.
@misc{etde_20747403,
title = {Alloy composition, deformation temperature, pressure and post-deformation annealing effects in severely deformed Ti-Ni based shape memory alloys}
author = {Prokoshkin, S D, Khmelevskaya, I Yu, Dobatkin, S V, Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)], Trubitsyna, I B, Tatyanin, E V, Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)], Stolyarov, V V, and Prokofiev, E A}
abstractNote = {Structure formation in Ti-48.5, Ti-50.0, Ti-50.7 at.% Ni and Ti-47 at.% Ni-3 at.% Fe shape memory alloys depending on deformation temperature (-196 to 400 deg C) and pressure (4-8 GPa) under conditions of high-pressure torsion and post-deformation annealing (200-400 deg C) was studied using transmission electron microscopy and X-ray diffraction methods. The tendency to form an amorphous structure depends on the relative values of the deformation temperature and martensite start (M {sub s}) temperature as follows: it is strongest in initially martensitic alloy, intermediate in a premartensitic austenite, and the weakest in initially thermally stable austenitic alloy. Lowering of the deformation temperature in the range below the martensite finish (M {sub f}) temperature facilitates amorphization. Raising of the deformation temperature in the austenitic temperature range suppresses amorphization. The upper limiting deformation temperature for partial amorphization of the alloy having the highest M {sub s} is located about 300 deg C. The upper limiting deformation temperature for actually nanocrystalline structure formation is located about 350 deg C for non-aging Ti-Ni alloys and somewhat higher than 400 deg C for aged Ti-Ni alloy. The thermomechanical conditions of the equal-channel angular pressing for obtaining actually nanocrystalline structure are recommended. Isothermal martensitic transformation is observed in the Ti-48.5 at.% Ni alloy as a result of keeping for 10 year at room temperature after high-temperature severe plastic deformation. Increasing the pressure suppresses the tendency to form an amorphous structure. The nanocrystalline structure formed under post-deformation annealing from the amorphous structure remains finer than the nanostructure formed as a result of severe plastic deformation through the annealing temperature range covering a nano-grain size scale.}
doi = {10.1016/j.actamat.2005.02.032}
journal = []
issue = {9}
volume = {53}
place = {United Kingdom}
year = {2005}
month = {May}
}
title = {Alloy composition, deformation temperature, pressure and post-deformation annealing effects in severely deformed Ti-Ni based shape memory alloys}
author = {Prokoshkin, S D, Khmelevskaya, I Yu, Dobatkin, S V, Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky prosp., 49, Moscow 119049 (Russian Federation)], Trubitsyna, I B, Tatyanin, E V, Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk (Russian Federation)], Stolyarov, V V, and Prokofiev, E A}
abstractNote = {Structure formation in Ti-48.5, Ti-50.0, Ti-50.7 at.% Ni and Ti-47 at.% Ni-3 at.% Fe shape memory alloys depending on deformation temperature (-196 to 400 deg C) and pressure (4-8 GPa) under conditions of high-pressure torsion and post-deformation annealing (200-400 deg C) was studied using transmission electron microscopy and X-ray diffraction methods. The tendency to form an amorphous structure depends on the relative values of the deformation temperature and martensite start (M {sub s}) temperature as follows: it is strongest in initially martensitic alloy, intermediate in a premartensitic austenite, and the weakest in initially thermally stable austenitic alloy. Lowering of the deformation temperature in the range below the martensite finish (M {sub f}) temperature facilitates amorphization. Raising of the deformation temperature in the austenitic temperature range suppresses amorphization. The upper limiting deformation temperature for partial amorphization of the alloy having the highest M {sub s} is located about 300 deg C. The upper limiting deformation temperature for actually nanocrystalline structure formation is located about 350 deg C for non-aging Ti-Ni alloys and somewhat higher than 400 deg C for aged Ti-Ni alloy. The thermomechanical conditions of the equal-channel angular pressing for obtaining actually nanocrystalline structure are recommended. Isothermal martensitic transformation is observed in the Ti-48.5 at.% Ni alloy as a result of keeping for 10 year at room temperature after high-temperature severe plastic deformation. Increasing the pressure suppresses the tendency to form an amorphous structure. The nanocrystalline structure formed under post-deformation annealing from the amorphous structure remains finer than the nanostructure formed as a result of severe plastic deformation through the annealing temperature range covering a nano-grain size scale.}
doi = {10.1016/j.actamat.2005.02.032}
journal = []
issue = {9}
volume = {53}
place = {United Kingdom}
year = {2005}
month = {May}
}