Title of article :
Shear bands in metallic glasses: Size effects on thermal profiles Original Research Article
Author/Authors :
D.B. Miracle، نويسنده , , A. Concustell، نويسنده , , Y. Zhang، نويسنده , , A.R. Yavari، نويسنده , , A.L. Greer، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2011
Abstract :
The characteristic dimensions of the hot, liquid zone behind a moving shear-band front in a metallic glass are analyzed. In addition to the expected dependence on material constants, the thickness of the zone is proportional to the shear offset, while its width is proportional to the square of the offset. Considering the bending of a plate, the size and shape of the hot zone are found to be strongly dependent on plate thickness. For shear offsets image, typical of plate thickness image, local temperature rises are insignificant. For larger dimensions, local temperature rises give a liquid zone centered on the shear plane with width comparable to the sample dimensions. The scaling of characteristic lengths and times with plate thickness facilitates the interpretation of the transitions observed in mechanical behavior, and the variation in behavior from glass to glass.
Keywords :
Plastic deformation , Shear bands , Thermal diffusion , Metallic glasses , Bending test
Journal title :
ACTA Materialia
Journal title :
ACTA Materialia