Paradoxical phenomena between the homogeneous and inhomogeneous deformations of metallic glasses

Park, Kyoung-Won; Lee, Chang-Myeon; Lee, Mi-Rim; Fleury, Eric; Falk, Michael L.; Lee, Jae-Chul
January 2009
Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG
Academic Journal
Experiments in binary alloys demonstrate that metallic glasses exhibiting more plastic strain during homogeneous deformation tend to show lower global plasticity during inhomogeneous deformation. Testing of Cu–Zr binary alloys supports the hypothesis that the formation energy of a shear transformation zone, as extracted from the experimental data, is related to the homogeneous flow rate. We also report the microstructural aspects that control the global plasticity of metallic glasses in the light of structural disordering, softening, and shear localization.


Related Articles

  • Rapid Communications: Rate dependence of shear banding and serrated flows in a bulk metallic glass. Jiang, W. H.; Fan, G. J.; Liu, F. X.; Wang, G. Y.; Choo, H.; Liaw, P. K. // Journal of Materials Research;Sep2006, Vol. 21 Issue 9, p2164 

    Using an infrared camera, we observed in situ dynamic shear-banding operations during compression of a bulk metallic glass at various strain rates. We demonstrated that the shear-banding events are highly dependent on strain rates, either intermittent at the lower strain rate or successive at...

  • Plasticity-improved Zr–Cu–Al bulk metallic glass matrix composites containing martensite phase. Sun, Y. F.; Wei, B. C.; Wang, Y. R.; Li, W. H.; Cheung, T. L.; Shek, C. H. // Applied Physics Letters;8/1/2005, Vol. 87 Issue 5, p051905 

    Zr48.5Cu46.5Al5 bulk metallic glass matrix composites with diameters of 3 and 4 mm were produced through water-cooled copper mold casting. Micrometer-sized bcc based B2 structured CuZr phase containing martensite plate, together with some densely distributed nanocrystalline Zr2Cu and plate-like...

  • Delayed Failure in a Shock Loaded Alumina. Cooper, G. A.; Millett, J. C. F.; Bourne, N. K.; Dandekar, D. P. // AIP Conference Proceedings;2006, Vol. 845 Issue 1, p847 

    Manganin stress gauges have been used to measure the lateral stress in a shock-loaded alumina. In combination with known longitudinal stresses, these have been used to determine the shear strength of this material, behind the shock front. The two-step nature of the lateral stress traces shows a...

  • The Self-Organized Critical Behavior in Pd-based Bulk Metallic Glass. Zhong Wang; Jiaojiao Li; Wei Zhang; Junwei Qiao; Baocheng Wang // Metals (2075-4701);2015, Vol. 5 Issue 3, p1188 

    Bulk metallic glasses (BMGs) deform irreversibly through shear banding manifested as serrated-flow behavior during compressive tests. The strain-rate-dependent plasticity under uniaxial compression at the strain rates of 2 × 10-2, 2 × 10-3, and 2 × 10-4·s-1 in a Pd-based BMG is...

  • Evaluation of the relationship between the effective strain and the springback behavior during the deformation of metallic glass ribbons. Lee, M. H.; Park, E. S.; Ott, R. T.; Kim, B. S.; Eckert, J. // Applied Physics Letters;8/11/2014, Vol. 105 Issue 6, p1 

    We evaluated the role of effective strain on the plasticity of metallic glasses related to springback phenomena in both ductile Zr-based metallic glass and brittle Hf-based metallic glass. Experimental investigations of the deformation behavior and the intrinsic mechanical properties of metallic...

  • Deformation behaviors and mechanism of Ni-Co-Nb-Ta bulk metallic glasses with high strength and plasticity. Liu, Y. H.; Wang, G.; Pan, M. X.; Yu, P.; Zhao, D. Q.; Wang, W. H. // Journal of Materials Research;Apr2007, Vol. 22 Issue 4, p31 

    A class of Ni-Co-Nb-Ta bulk metallic glasses (BMGs) with a high glass-forming ability is developed. With proper compositional modification, the BMGs exhibit the enhanced plastic strain (up to 4%) and the ultimate strength (up to 3540 MPa). It is found that the interactions of shear bands such as...

  • Metallic glasses: Must shear bands be hot? Spaepen, Frans // Nature Materials;Jan2006, Vol. 5 Issue 1, p7 

    The article discusses the mechanical properties of metallic glasses. A metallic glass is produced by cooling an alloy melt under conditions that prevent crystallization. Yet, the material is said to deform. In the plastic deformation of metals at low temperatures, the smaller the crystals that...

  • Shear Band Patterns in Metallic Glasses under Static Indentation, Dynamic Indentation, and Scratch Processes. Subhash, Ghatu; Hongwen Zhang // Metallurgical & Materials Transactions. Part A;Dec2007, Vol. 38 Issue 12, p2936 

    The deformation structure in terms of shear band patterns in bulk metallic glasses (BMGs) under static indentation, dynamic indentation, and dynamic scratch tests has been investigated. The evolved shear band patterns appear to be a strong function of loading rate, although the plastic regions...

  • Negative strain rate sensitivity in bulk metallic glass and its similarities with the dynamic strain aging effect during deformation. Dalla Torre, Florian H.; Dubach, Alban; Siegrist, Marco E.; Löffler, Jörg F. // Applied Physics Letters;8/28/2006, Vol. 89 Issue 9, p091918 

    Detailed investigations were carried out on the deformation behavior of Zr-based monolithic bulk metallic glass and bulk metallic glass matrix composites. The latter, due to splitting and multiplication of shear bands, exhibits larger compressive strains than the former, without significant loss...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics