Enhanced strain rate sensitivity of Zr-based bulk metallic glasses subjected to high pressure torsion

E. V. Boltynjuk, D. V. Gunderov, E. V. Ubyivovk, M. A. Monclús, L. W. Yang, J. M. Molina-Aldareguia, A. I. Tyurin, A. R. Kilmametov, A. A. Churakova, A. Yu Churyumov, R. Z. Valiev

Research outputpeer-review

12 Citations (Scopus)

Abstract

The Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) was subjected to high pressure torsion (HPT) at room temperature. The state after HPT processing demonstrates presence of large number of heterogeneities in amorphous structure – shear bands. Nanoindentation was used to study the effect of HPT processing on deformation behavior and strain rate sensitivity (m). It was found that HPT significantly affects mechanical behavior of BMG during nanoindentation. Decrease in hardness and Young's modulus was observed after HPT. At the same time HPT processing led to an increase in m from 0.014 for the as-cast material to 0.036. The lack of serration flow and shear bands around imprints was observed in addition to above mentioned changes. A much less localized deformation mode under nanoindentation along with an increase in values of strain rate sensitivity of HPT-processed state in comparison with the initial state imply homogeneous deformation behavior after processing. The observed drastic changes in deformation behavior and structure can be explained as the formation of a highly-heterogeneous amorphous structure resembling nanoglasses in result of HPT processing.

Original languageEnglish
Pages (from-to)595-602
Number of pages8
JournalJournal of Alloys and Compounds
Volume747
DOIs
Publication statusPublished - 30 May 2018

Scopus subject areas

  • Materials Chemistry
  • Mechanical Engineering
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Boltynjuk, E. V. ; Gunderov, D. V. ; Ubyivovk, E. V. ; Monclús, M. A. ; Yang, L. W. ; Molina-Aldareguia, J. M. ; Tyurin, A. I. ; Kilmametov, A. R. ; Churakova, A. A. ; Churyumov, A. Yu ; Valiev, R. Z. / Enhanced strain rate sensitivity of Zr-based bulk metallic glasses subjected to high pressure torsion. In: Journal of Alloys and Compounds. 2018 ; Vol. 747. pp. 595-602.
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abstract = "The Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) was subjected to high pressure torsion (HPT) at room temperature. The state after HPT processing demonstrates presence of large number of heterogeneities in amorphous structure – shear bands. Nanoindentation was used to study the effect of HPT processing on deformation behavior and strain rate sensitivity (m). It was found that HPT significantly affects mechanical behavior of BMG during nanoindentation. Decrease in hardness and Young's modulus was observed after HPT. At the same time HPT processing led to an increase in m from 0.014 for the as-cast material to 0.036. The lack of serration flow and shear bands around imprints was observed in addition to above mentioned changes. A much less localized deformation mode under nanoindentation along with an increase in values of strain rate sensitivity of HPT-processed state in comparison with the initial state imply homogeneous deformation behavior after processing. The observed drastic changes in deformation behavior and structure can be explained as the formation of a highly-heterogeneous amorphous structure resembling nanoglasses in result of HPT processing.",
keywords = "High pressure torsion, Metallic glasses, Nanoindentation, Shear transformation zones, Strain rate sensitivity, Transmission electron microscopy, NANOINDENTATION, BEHAVIOR, INDENTATION, STRENGTH, MECHANICAL-PROPERTIES, AMORPHOUS-ALLOYS, DEPENDENCE, FREE-VOLUME, PLASTIC-DEFORMATION, DUCTILITY, Metallic glasses, High pressure torsion, Transmission electron microscopy, Nanoindentation, Strain rate sensitivity, Shear transformation zones",
author = "Boltynjuk, {E. V.} and Gunderov, {D. V.} and Ubyivovk, {E. V.} and Moncl{\'u}s, {M. A.} and Yang, {L. W.} and Molina-Aldareguia, {J. M.} and Tyurin, {A. I.} and Kilmametov, {A. R.} and Churakova, {A. A.} and Churyumov, {A. Yu} and Valiev, {R. Z.}",
note = "Категории Scopus: Materials Chemistry, Mechanical Engineering, Mechanics of Materials, Metals and Alloys Категории Web of Science: Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering",
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Enhanced strain rate sensitivity of Zr-based bulk metallic glasses subjected to high pressure torsion. / Boltynjuk, E. V.; Gunderov, D. V.; Ubyivovk, E. V.; Monclús, M. A.; Yang, L. W.; Molina-Aldareguia, J. M.; Tyurin, A. I.; Kilmametov, A. R.; Churakova, A. A.; Churyumov, A. Yu; Valiev, R. Z.

In: Journal of Alloys and Compounds, Vol. 747, 30.05.2018, p. 595-602.

Research outputpeer-review

TY - JOUR

T1 - Enhanced strain rate sensitivity of Zr-based bulk metallic glasses subjected to high pressure torsion

AU - Boltynjuk, E. V.

AU - Gunderov, D. V.

AU - Ubyivovk, E. V.

AU - Monclús, M. A.

AU - Yang, L. W.

AU - Molina-Aldareguia, J. M.

AU - Tyurin, A. I.

AU - Kilmametov, A. R.

AU - Churakova, A. A.

AU - Churyumov, A. Yu

AU - Valiev, R. Z.

N1 - Категории Scopus: Materials Chemistry, Mechanical Engineering, Mechanics of Materials, Metals and Alloys Категории Web of Science: Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

PY - 2018/5/30

Y1 - 2018/5/30

N2 - The Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) was subjected to high pressure torsion (HPT) at room temperature. The state after HPT processing demonstrates presence of large number of heterogeneities in amorphous structure – shear bands. Nanoindentation was used to study the effect of HPT processing on deformation behavior and strain rate sensitivity (m). It was found that HPT significantly affects mechanical behavior of BMG during nanoindentation. Decrease in hardness and Young's modulus was observed after HPT. At the same time HPT processing led to an increase in m from 0.014 for the as-cast material to 0.036. The lack of serration flow and shear bands around imprints was observed in addition to above mentioned changes. A much less localized deformation mode under nanoindentation along with an increase in values of strain rate sensitivity of HPT-processed state in comparison with the initial state imply homogeneous deformation behavior after processing. The observed drastic changes in deformation behavior and structure can be explained as the formation of a highly-heterogeneous amorphous structure resembling nanoglasses in result of HPT processing.

AB - The Zr62Cu22Al10Fe5Dy1 bulk metallic glass (BMG) was subjected to high pressure torsion (HPT) at room temperature. The state after HPT processing demonstrates presence of large number of heterogeneities in amorphous structure – shear bands. Nanoindentation was used to study the effect of HPT processing on deformation behavior and strain rate sensitivity (m). It was found that HPT significantly affects mechanical behavior of BMG during nanoindentation. Decrease in hardness and Young's modulus was observed after HPT. At the same time HPT processing led to an increase in m from 0.014 for the as-cast material to 0.036. The lack of serration flow and shear bands around imprints was observed in addition to above mentioned changes. A much less localized deformation mode under nanoindentation along with an increase in values of strain rate sensitivity of HPT-processed state in comparison with the initial state imply homogeneous deformation behavior after processing. The observed drastic changes in deformation behavior and structure can be explained as the formation of a highly-heterogeneous amorphous structure resembling nanoglasses in result of HPT processing.

KW - High pressure torsion

KW - Metallic glasses

KW - Nanoindentation

KW - Shear transformation zones

KW - Strain rate sensitivity

KW - Transmission electron microscopy

KW - NANOINDENTATION

KW - BEHAVIOR

KW - INDENTATION

KW - STRENGTH

KW - MECHANICAL-PROPERTIES

KW - AMORPHOUS-ALLOYS

KW - DEPENDENCE

KW - FREE-VOLUME

KW - PLASTIC-DEFORMATION

KW - DUCTILITY

KW - Metallic glasses

KW - High pressure torsion

KW - Transmission electron microscopy

KW - Nanoindentation

KW - Strain rate sensitivity

KW - Shear transformation zones

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DO - 10.1016/j.jallcom.2018.03.018

M3 - статья

VL - 747

SP - 595

EP - 602

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -