Observation of shear bands in the Vitreloy metallic glass subjected to HPT processing

D. V. Gunderov, A. A. Churakova, E. V. Boltynjuk, E. V. Ubyivovk, V. V. Astanin, R. N. Asfandiyarov, R. Z. Valiev, W. Xioang, J. T. Wang

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The parameters of shear band evolution with deformation were examined in the Vit105 bulk metallic glass. For this purpose, two halves of disks of the bulk metallic glass were joined together and processed by high-pressure torsion for various strains: from compression without rotation, to rotation for 5 revolutions. The discrepancy between the experimentally observed and predicted shear strains was detected. The actual strain is significantly smaller than the predicted one. The SEM examination of the internal surfaces of two joint halves of an HPT-processed disk allowed to study the formation and accumulation of shear bands under an increased imposed strain. The maximum density of the shear bands is observed at the edges of the HPT samples and in areas adjacent to the upper anvils. An increase in strain leads to an increase in the shear bands density. The observed minimum shear band spacing is equal to 0.5 μm after HPT processing for 5 revolutions. According to the structural changes recorded by XRD (an increase in the free volume content by about 1.3%) and formation of a high density of shear bands, HPT leads to a significant structural transformation of the amorphous structure of the BMG.

Original languageEnglish
Pages (from-to)58-63
Number of pages6
JournalJournal of Alloys and Compounds
Volume800
DOIs
StatePublished - 5 Sep 2019

Keywords

  • High-pressure torsion
  • Metallic glass
  • Scanning electron microscopy
  • Shear bands
  • HIGH-PRESSURE-TORSION
  • PLASTIC-DEFORMATION
  • DUCTILITY
  • ALLOY
  • AMORPHOUS PHASE
  • BULK

Scopus subject areas

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

Cite this

@article{695cb9d29b98468b958186d1e583f8c3,
title = "Observation of shear bands in the Vitreloy metallic glass subjected to HPT processing",
abstract = "The parameters of shear band evolution with deformation were examined in the Vit105 bulk metallic glass. For this purpose, two halves of disks of the bulk metallic glass were joined together and processed by high-pressure torsion for various strains: from compression without rotation, to rotation for 5 revolutions. The discrepancy between the experimentally observed and predicted shear strains was detected. The actual strain is significantly smaller than the predicted one. The SEM examination of the internal surfaces of two joint halves of an HPT-processed disk allowed to study the formation and accumulation of shear bands under an increased imposed strain. The maximum density of the shear bands is observed at the edges of the HPT samples and in areas adjacent to the upper anvils. An increase in strain leads to an increase in the shear bands density. The observed minimum shear band spacing is equal to 0.5 μm after HPT processing for 5 revolutions. According to the structural changes recorded by XRD (an increase in the free volume content by about 1.3{\%}) and formation of a high density of shear bands, HPT leads to a significant structural transformation of the amorphous structure of the BMG.",
keywords = "Metallic glass, High-pressure torsion, Shear bands, Scanning electron microscopy, High-pressure torsion, Metallic glass, Scanning electron microscopy, Shear bands, HIGH-PRESSURE-TORSION, PLASTIC-DEFORMATION, DUCTILITY, ALLOY, AMORPHOUS PHASE, BULK",
author = "Gunderov, {D. V.} and Churakova, {A. A.} and Boltynjuk, {E. V.} and Ubyivovk, {E. V.} and Astanin, {V. V.} and Asfandiyarov, {R. N.} and Valiev, {R. Z.} and W. Xioang and Wang, {J. T.}",
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",
year = "2019",
month = "9",
day = "5",
doi = "10.1016/j.jallcom.2019.06.043",
language = "English",
volume = "800",
pages = "58--63",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier",

}

Observation of shear bands in the Vitreloy metallic glass subjected to HPT processing. / Gunderov, D. V.; Churakova, A. A.; Boltynjuk, E. V.; Ubyivovk, E. V.; Astanin, V. V.; Asfandiyarov, R. N.; Valiev, R. Z.; Xioang, W.; Wang, J. T.

In: Journal of Alloys and Compounds, Vol. 800, 05.09.2019, p. 58-63.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Observation of shear bands in the Vitreloy metallic glass subjected to HPT processing

AU - Gunderov, D. V.

AU - Churakova, A. A.

AU - Boltynjuk, E. V.

AU - Ubyivovk, E. V.

AU - Astanin, V. V.

AU - Asfandiyarov, R. N.

AU - Valiev, R. Z.

AU - Xioang, W.

AU - Wang, J. T.

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 - 2019/9/5

Y1 - 2019/9/5

N2 - The parameters of shear band evolution with deformation were examined in the Vit105 bulk metallic glass. For this purpose, two halves of disks of the bulk metallic glass were joined together and processed by high-pressure torsion for various strains: from compression without rotation, to rotation for 5 revolutions. The discrepancy between the experimentally observed and predicted shear strains was detected. The actual strain is significantly smaller than the predicted one. The SEM examination of the internal surfaces of two joint halves of an HPT-processed disk allowed to study the formation and accumulation of shear bands under an increased imposed strain. The maximum density of the shear bands is observed at the edges of the HPT samples and in areas adjacent to the upper anvils. An increase in strain leads to an increase in the shear bands density. The observed minimum shear band spacing is equal to 0.5 μm after HPT processing for 5 revolutions. According to the structural changes recorded by XRD (an increase in the free volume content by about 1.3%) and formation of a high density of shear bands, HPT leads to a significant structural transformation of the amorphous structure of the BMG.

AB - The parameters of shear band evolution with deformation were examined in the Vit105 bulk metallic glass. For this purpose, two halves of disks of the bulk metallic glass were joined together and processed by high-pressure torsion for various strains: from compression without rotation, to rotation for 5 revolutions. The discrepancy between the experimentally observed and predicted shear strains was detected. The actual strain is significantly smaller than the predicted one. The SEM examination of the internal surfaces of two joint halves of an HPT-processed disk allowed to study the formation and accumulation of shear bands under an increased imposed strain. The maximum density of the shear bands is observed at the edges of the HPT samples and in areas adjacent to the upper anvils. An increase in strain leads to an increase in the shear bands density. The observed minimum shear band spacing is equal to 0.5 μm after HPT processing for 5 revolutions. According to the structural changes recorded by XRD (an increase in the free volume content by about 1.3%) and formation of a high density of shear bands, HPT leads to a significant structural transformation of the amorphous structure of the BMG.

KW - Metallic glass

KW - High-pressure torsion

KW - Shear bands

KW - Scanning electron microscopy

KW - High-pressure torsion

KW - Metallic glass

KW - Scanning electron microscopy

KW - Shear bands

KW - HIGH-PRESSURE-TORSION

KW - PLASTIC-DEFORMATION

KW - DUCTILITY

KW - ALLOY

KW - AMORPHOUS PHASE

KW - BULK

UR - http://www.scopus.com/inward/record.url?scp=85067000813&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/observation-shear-bands-vitreloy-metallic-glass-subjected-hpt-processing

U2 - 10.1016/j.jallcom.2019.06.043

DO - 10.1016/j.jallcom.2019.06.043

M3 - Article

VL - 800

SP - 58

EP - 63

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -