Accumulative HPT of Zr-based bulk metallic glasses

D.V. Gunderov, A.A. Churakova, V. V. Astanin, R. N. Asfandiyarov, H. Hahn, R.Z. Valiev

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

Studies show that with the HPT of bulk metallic glass, the actual achievable strain is significantly lower than the one predicted by the equation γ=2πnR/h. Such a discrepancy can be explained by the effect of “slippage” during the HPT. The authors proposed a new method − “accumulative HPT” − to achieve a high strain in hard materials, including BMGs. In the accumulative HPT procedure, a sample undergoes several cycles: “HPT n = 1 revolution → cutting a sample into pieces → pressing of stacked parts on the anvils and subsequent HPT n = 1”. At the last stage, the stacked segments are subjected to HPT with many revolutions (n ≥ 3) whereby the sample is consolidated into a monolithic disk. As a result, the material receives a significant total strain by pressing and torsion. The article presents the first results of the “accumulative HPT” processing of a Zr-based BMG and a crystallized Zr-based intermetallic.

Язык оригиналаанглийский
Номер статьи127000
ЖурналMaterials Letters
Том261
Ранняя дата в режиме онлайн11 ноя 2019
DOI
СостояниеОпубликовано - 2020

Отпечаток

Metallic glass
metallic glasses
pressing
anvils
Torsional stress
Intermetallics
torsion
intermetallics
cycles
Processing

Предметные области Scopus

  • Материаловедение (все)
  • Физика конденсатов
  • Сопротивление материалов
  • Общее машиностроение

Цитировать

Gunderov, D. V., Churakova, A. A., Astanin, V. V., Asfandiyarov, R. N., Hahn, H., & Valiev, R. Z. (2020). Accumulative HPT of Zr-based bulk metallic glasses. Materials Letters, 261, [127000]. https://doi.org/10.1016/j.matlet.2019.127000
Gunderov, D.V. ; Churakova, A.A. ; Astanin, V. V. ; Asfandiyarov, R. N. ; Hahn, H. ; Valiev, R.Z. / Accumulative HPT of Zr-based bulk metallic glasses. В: Materials Letters. 2020 ; Том 261.
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Gunderov, DV, Churakova, AA, Astanin, VV, Asfandiyarov, RN, Hahn, H & Valiev, RZ 2020, 'Accumulative HPT of Zr-based bulk metallic glasses', Materials Letters, том. 261, 127000. https://doi.org/10.1016/j.matlet.2019.127000

Accumulative HPT of Zr-based bulk metallic glasses. / Gunderov, D.V. ; Churakova, A.A.; Astanin, V. V.; Asfandiyarov, R. N.; Hahn, H.; Valiev, R.Z.

В: Materials Letters, Том 261, 127000, 2020.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - Accumulative HPT of Zr-based bulk metallic glasses

AU - Gunderov, D.V.

AU - Churakova, A.A.

AU - Astanin, V. V.

AU - Asfandiyarov, R. N.

AU - Hahn, H.

AU - Valiev, R.Z.

PY - 2020

Y1 - 2020

N2 - Studies show that with the HPT of bulk metallic glass, the actual achievable strain is significantly lower than the one predicted by the equation γ=2πnR/h. Such a discrepancy can be explained by the effect of “slippage” during the HPT. The authors proposed a new method − “accumulative HPT” − to achieve a high strain in hard materials, including BMGs. In the accumulative HPT procedure, a sample undergoes several cycles: “HPT n = 1 revolution → cutting a sample into pieces → pressing of stacked parts on the anvils and subsequent HPT n = 1”. At the last stage, the stacked segments are subjected to HPT with many revolutions (n ≥ 3) whereby the sample is consolidated into a monolithic disk. As a result, the material receives a significant total strain by pressing and torsion. The article presents the first results of the “accumulative HPT” processing of a Zr-based BMG and a crystallized Zr-based intermetallic.

AB - Studies show that with the HPT of bulk metallic glass, the actual achievable strain is significantly lower than the one predicted by the equation γ=2πnR/h. Such a discrepancy can be explained by the effect of “slippage” during the HPT. The authors proposed a new method − “accumulative HPT” − to achieve a high strain in hard materials, including BMGs. In the accumulative HPT procedure, a sample undergoes several cycles: “HPT n = 1 revolution → cutting a sample into pieces → pressing of stacked parts on the anvils and subsequent HPT n = 1”. At the last stage, the stacked segments are subjected to HPT with many revolutions (n ≥ 3) whereby the sample is consolidated into a monolithic disk. As a result, the material receives a significant total strain by pressing and torsion. The article presents the first results of the “accumulative HPT” processing of a Zr-based BMG and a crystallized Zr-based intermetallic.

KW - Interfaces and surfaces

KW - Kinetics

KW - Nanocrystalline metals

KW - Thermodynamics

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DO - 10.1016/j.matlet.2019.127000

M3 - Article

VL - 261

JO - Materials Letters

JF - Materials Letters

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Gunderov DV, Churakova AA, Astanin VV, Asfandiyarov RN, Hahn H, Valiev RZ. Accumulative HPT of Zr-based bulk metallic glasses. Materials Letters. 2020;261. 127000. https://doi.org/10.1016/j.matlet.2019.127000