The uniaxial tensile behavior of Zr_(62)Al_(8)Ni_(13)Cu_(17), Cu_(46)Zr_(46)Al_(8), Zr_(48)Cu_(43)Al_(7)Ag_(2), and La_(62)Al_(14)(Cu_(5/6)Ag_(1/6))_(14)Co_(5)Ni_(5) bulk metallic glasses (BMGs) has been investigated by using in situ synchrotron radiation diffraction technique. It is found that the local strain is basically homogeneously distributed at low stress. However, heterogeneity appears obviously when the stress is close to the fracture strength. The amplitude of fluctuation in local strain for four BMGs could relate to the distribution of excess free volume within the medium range order.
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Department of Materials Science and Engineering, Laboratory of New-Structured Materials, Zhejiang University, Hangzhou 310027, People's Republic of China;
