[Download]Name: Shen L Q et al.(2018). Shear-band affected zone revealed by magnetic domains in a ferromagnetic metallic glass. Nature communications 9, 4414(2018).
Plastic deformation of metallic glasses (MGs) has long been considered to be confined
to nanoscale shear bands, but recently an affected zone around the shear band was found.
Yet, due to technical limitations, the shear-band affected zone (SBAZ), which is critical for
understanding shear banding and design of ductile MGs, has yet to be precisely identified.
Here, by using magnetic domains as a probe with sufficiently high sensitivity and spatial
resolution, we unveil the structure of SBAZs in detail. We demonstrate that shear banding
is accompanied by a micrometer-scale SBAZ with a gradient in the strain field, and multiple
shear bands interact through the superimposition of SBAZs. There also exists an ultra-longrange
gradual elastic stress field extending hundreds of micrometers away from the shear
band. Our findings provide a comprehensive picture on shear banding and are important for
elucidating the micro-mechanisms of plastic deformation in glasses.