Local strain behavior of bulk metallic glasses under tension studied by in situ x-ray diffraction

Wang, X. D.; Bednarcik, J.; Franz, H.; Lou, H. B.; He, Z. H.; Cao, Q. P.; Jiang, J. Z.
January 2009
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p011911
Academic Journal
The uniaxial tensile behavior of Zr62Al8Ni13Cu17, Cu46Zr46Al8, Zr48Cu43Al7Ag2, and La62Al14(Cu5/6Ag1/6)14Co5Ni5 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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