The influence of rolling and high-pressure torsion in the Bridgman chamber on the quantitative characteristics of shear bands in an amorphous Zr-based alloy


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Abstract

Amorphous alloys based on metal components demonstrate a unique ability to realize plastic deformation under the influence of external mechanical stresses. Influenced by substantial degrees of plastic deformation in alloys, one can observe shear bands (SB) in the form of rough lines on the polished surface of the sample. The concept of shear band formation in amorphous metallic glasses varies greatly from plastic deformation processes in crystalline metals and alloys. Unlike crystalline metals, amorphous metallic glasses can exist in a spectrum of structural states with accompanying mechanical, thermodynamic, and physical properties of materials. The formation and evolution of shear bands control the fluidity and plasticity of almost all metallic glasses at room temperature, and in many cases, the formation of dominant shear bands rapidly leads to failure. The literature does not contain any rigorous quantitative description of SB main parameters, which could adequately describe in the analytical form the process of plastic deformation of amorphous alloys, similar to the dislocation and disclination theories of plastic deformation of crystals. An open question remains how the transition from macroscopic deformation to severe plastic deformations of amorphous alloys affects the key SB characteristics. In this work, using the method of optical profilometry, the author studied in detail the quantitative characteristics of the steps formed by shear bands on the surface of deformed samples of the massive amorphous alloy Zr60Ti2Nb2Cu18.5Ni7.5Al10 after high-pressure torsion (HPT) and after rolling. The study identified that the design of shear bands depends on the deformation method and showed that the magnitude of deformation had the controlling effect on the shear bands thickness (the height of the steps). The transition from deformation by rolling (e=0.4) to plastic deformation during HPT (e=2.6) leads to the threefold increase in the power of shear bands and the average distance between them.

About the authors

Irina A. Khriplivets

National University of Science and Technology MISIS, Moscow (Russia)

Author for correspondence.
Email: misshriplivets@mail.ru
ORCID iD: 0000-0002-9494-9000

postgraduate student of Chair of Physical Materials Science

Россия

References

  1. Greer A.L., Cheng Y.Q., Ma E. Sear bands in metallic glasses. Materials Science and Engineering R-Reports, 2013, vol. 74, no. 4, pp. 71–132. doi: 10.1016/j.mser.2013.04.001.
  2. Zhang Q.S., Zhang W., Xie G.Q., Louzguine-Luzgin D.V., Inoue A. Stable flowing of localized shear bands in soft bulk metallic glasses. Acta Materialia, 2010, vol. 58, no. 3, pp. 904–909. doi: 10.1016/j.actamat.2009.10.005.
  3. Donovan P.E., Stobbs W.M. The structure of shear bands in metallic glasses. Acta Metallurgica, 1981, vol. 29, no. 8, pp. 1419–1436.
  4. Zhang Y., Greer A.L. Thickness of shear bands in metallic glasses. Applied Physics Letters, 2006, vol. 89, no. 7, article number 071907.
  5. Masumoto T., Maddin R. The mechanical properties of palladium 20 a/o silicon alloy quenched from the liquid state. Acta Metallurgica, 1971, vol. 19, no. 7, pp. 725–741. doi: 10.1016/0001-6160(71)90028-9.
  6. Rösner H., Peterlechner M., Kübel C., Schmidt V., Wilde G. Density changes in shear bands of a metallic glass determined by correlative analytical transmission electron microscopy. Ultramicroscopy, 2014, vol. 142, pp. 1–9. doi: 10.1016/j.ultramic.2014.03.006.
  7. Glezer A.M., Kozlov E.V., Koneva N.A., Popova N.A., Kurzina I.A. Plastic deformation of nanostructured materials. Boca Raton, CRC Press Publ., 2017. 320 p.
  8. Abrosimova G., Aronin A., Fokin D., Orlova N., Postnova E. The decrease of Young`s modulus in shear bands of amorphous Al87Ni8La5 alloy after deformation. Materials Letters, 2019, vol. 252, pp. 114–116. doi: 10.1016/j.matlet.2019.05.099.
  9. Gunderov D., Astanin V. Influence of HPT deformation on the structure and properties of amorphous alloys. Metals, 2020, vol. 10, no. 3, article number 415. doi: 10.3390/met10030415.
  10. Maass R., Samver K., Arnold W., Volkert C.A. A single shear band in a metallic glass: Local core and wide soft zone. Applied Physics Letters, 2014, vol. 105, no. 17, article number 171902.
  11. Louzguine-Luzgin D.V., Zadorozhnyy V.Yu., Chen N., Ketov S.V. Evidence of the existence of two deformation stages in bulk metallic glasses. Journal of Non-Crystalline Solids, 2014, vol. 396-397, pp. 20–24.
  12. Glezer A.M., Louzguine-Luzgin D.V., Khriplivets I.A., Sundeev R.V., Gunderov D.V., Bazlov A.I., Pogozhev Y.S. Effect of high-pressure torsion on the tendency to plastic flow in bulk amorphous alloys based on Zr. Materials Letters, 2019, vol. 256, article number 126631. doi: 10.1016/j.matlet.2019.126631.
  13. Mazilkin A., Straumal B., Kilmametov A., Straumal P., Baretzky B. Phase transformations induced by severe plastic deformation. Materials Transactions, 2019, vol. 60, no. 8, pp. 1489–1499. doi: 10.2320/matertrans.MF201938.
  14. Glezer A.M., Plotnikova M.R., Sundeev R.V., Shurygina N.A. Self-Blocking of sear bands and delocalization of plastic flow in amorphous allys upon megaplastic deformation. Bulletin of the Russian Academy of Sciences: Physics, 2013, vol. 77, no. 11, pp. 1391–1396. doi: 10.3103/S1062873813110129.
  15. Conner R.D., Johnson W.L., Paton N.E., Nix W.D. Shear bands and cracking of metallic glass plates in bending. Journal of applied physics, 2003, vol. 94, no. 2, pp. 904–911.
  16. Conner R.D., Li Y., Nix W.D., Johnson W.L. Shear band spacing under bending of Zr-based metallic glass plates. Acta Materialia, 2004, vol. 52, no. 8, pp. 2429–2434.
  17. He Q., Xu J. Locating Malleable Bulk Metallic Glasses in Zr–Ti–Cu–Al Alloys with Calorimetric Glass Transition Temperature as an Indicator. Journal of Materials Science and Technology, 2012, vol. 28, no. 12, pp. 1109–1122.
  18. Flores K.M., Dauskardt R.H. Local heating associated with crack tip plasticity in Zr–Ti–Ni–Cu–Be bulk amorphous metals. Journal of Materials Research, 1999, vol. 14, no. 3, pp. 638–643.
  19. Wright W.J., Saha R., Nix W.D. Deformation mechanisms of the Zr40Ti14Ni10Cu12Be24 bulk metallic glass. Materials Transactions, 2001, vol. 42, no. 4, pp. 642–649.
  20. Zhilyaev A.P., Langdon T.G. Using high-pressure torsion for metal processing: fundamentals and applications. Progress in Materials Science, 2008, vol. 53, no. 6, pp. 893–979. doi: 10.1016/j.pmatsci.2008.03.002.

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