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High pressure torsion induced structural transformations in Ti- and Zr-based amorphous alloys. / Gunderov, D. V.; Boltynjuk, E. V.; Ubyivovk, E. V.; Churakova, A. A.; Abrosimova, G. E.; Sitdikov, V. D.; Kilmametov, A. R.; Valiev, R. Z.

In: IOP Conference Series: Materials Science and Engineering, Vol. 447, No. 1, 012052, 21.11.2018.

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@article{9c6f9554d9a744229e03d36989e9285d,
title = "High pressure torsion induced structural transformations in Ti- and Zr-based amorphous alloys",
abstract = "The melt-spun (MS) Ti50Ni25Cu25 alloy and the Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) were subjected to high pressure torsion (HPT). X-ray diffraction (XRD) measurements show a shift of the first diffraction halo to a low angle after HPT processing, which corresponds to an increase in the values of the radius of the first coordination sphere and the free volume. Direct density measurements confirmed an increase in free volume values. A special TEM procedure was used for a detailed study of the microstructure of both amorphous alloys after HPT processing. The study revealed the formation of a large density of shear bands (SBs) in both alloys. Nanocrystals are formed directly in shear bands as a result of strain-induced nanocrystallization. Amorphous nanoclusters with a size of 20 nm are formed in an amorphous matrix surrounding the SBs in the HPT-processed MS alloy Ti50Ni25Cu25. The formation of nanoclusters was not observed in BMG Zr62Cu22Al10Fe5Dy1 after HPT processing.",
author = "Gunderov, {D. V.} and Boltynjuk, {E. V.} and Ubyivovk, {E. V.} and Churakova, {A. A.} and Abrosimova, {G. E.} and Sitdikov, {V. D.} and Kilmametov, {A. R.} and Valiev, {R. Z.}",
year = "2018",
month = nov,
day = "21",
doi = "10.1088/1757-899X/447/1/012052",
language = "English",
volume = "447",
journal = "IOP Conference Series: Materials Science and Engineering",
issn = "1757-8981",
publisher = "IOP Publishing Ltd.",
number = "1",
note = "Open School-Conference of NIS Countries on Ultrafine Grained and Nanostructured Materials 2018, UFGNM 2018 ; Conference date: 01-10-2018 Through 05-10-2018",

}

RIS

TY - JOUR

T1 - High pressure torsion induced structural transformations in Ti- and Zr-based amorphous alloys

AU - Gunderov, D. V.

AU - Boltynjuk, E. V.

AU - Ubyivovk, E. V.

AU - Churakova, A. A.

AU - Abrosimova, G. E.

AU - Sitdikov, V. D.

AU - Kilmametov, A. R.

AU - Valiev, R. Z.

PY - 2018/11/21

Y1 - 2018/11/21

N2 - The melt-spun (MS) Ti50Ni25Cu25 alloy and the Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) were subjected to high pressure torsion (HPT). X-ray diffraction (XRD) measurements show a shift of the first diffraction halo to a low angle after HPT processing, which corresponds to an increase in the values of the radius of the first coordination sphere and the free volume. Direct density measurements confirmed an increase in free volume values. A special TEM procedure was used for a detailed study of the microstructure of both amorphous alloys after HPT processing. The study revealed the formation of a large density of shear bands (SBs) in both alloys. Nanocrystals are formed directly in shear bands as a result of strain-induced nanocrystallization. Amorphous nanoclusters with a size of 20 nm are formed in an amorphous matrix surrounding the SBs in the HPT-processed MS alloy Ti50Ni25Cu25. The formation of nanoclusters was not observed in BMG Zr62Cu22Al10Fe5Dy1 after HPT processing.

AB - The melt-spun (MS) Ti50Ni25Cu25 alloy and the Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) were subjected to high pressure torsion (HPT). X-ray diffraction (XRD) measurements show a shift of the first diffraction halo to a low angle after HPT processing, which corresponds to an increase in the values of the radius of the first coordination sphere and the free volume. Direct density measurements confirmed an increase in free volume values. A special TEM procedure was used for a detailed study of the microstructure of both amorphous alloys after HPT processing. The study revealed the formation of a large density of shear bands (SBs) in both alloys. Nanocrystals are formed directly in shear bands as a result of strain-induced nanocrystallization. Amorphous nanoclusters with a size of 20 nm are formed in an amorphous matrix surrounding the SBs in the HPT-processed MS alloy Ti50Ni25Cu25. The formation of nanoclusters was not observed in BMG Zr62Cu22Al10Fe5Dy1 after HPT processing.

UR - http://www.scopus.com/inward/record.url?scp=85058212566&partnerID=8YFLogxK

U2 - 10.1088/1757-899X/447/1/012052

DO - 10.1088/1757-899X/447/1/012052

M3 - Conference article

AN - SCOPUS:85058212566

VL - 447

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

M1 - 012052

T2 - Open School-Conference of NIS Countries on Ultrafine Grained and Nanostructured Materials 2018, UFGNM 2018

Y2 - 1 October 2018 through 5 October 2018

ER -

ID: 37461395