Compression Behavior of Mg-Cu-Gd Bulk Metallic Glasses with Various Specimen Height to Diameter Ratios

DOI Web Site 被引用文献1件 参考文献16件
  • Chen H. M.
    Institute of Materials Sci. & Eng.; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University
  • Chang Y. C.
    Institute of Materials Sci. & Eng.; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University
  • Hung T. H.
    Institute of Materials Sci. & Eng.; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University
  • Du X. H.
    Institute of Materials Sci. & Eng.; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering
  • Huang J. C.
    Institute of Materials Sci. & Eng.; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University
  • Jang J. S. C.
    Department of Materials Sci. & Eng., I-Shou University
  • Liaw P. K.
    Department of Materials Sci. & Eng., University of Tennessee

説明

The mechanical behavior of the Mg65Cu25Gd10 bulk metallic glasses (BMGs) in term of compression testing is reported in this study. Room-temperature compression tests are conducted on specimens with various height to diameter ratios (h⁄d) from 2:1, 1:1, 1:2, to 1:4. The failure strength, deformation strain, and the fracture surface morphologies are seen to vary systematically in accordance with the specimen h⁄d ratio. For specimens with h⁄d of 2:1 or 1:1, the compression response is similar to those in most reports. In contrast, for specimens with lower h⁄d ratios, especially at h⁄d=1:4 (or 0.25), the shear band propagation appears to be constrained, resulting in the enhanced ductility. It suggests that different deformation mechanisms are operative for specimens with different h⁄d ratios. The possible deformation mechanisms in specimens of different geometries are discussed.

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