Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A comparison of in- and ex situ generated shear bands in metallic glass
  by transmission electron microscopy   Shear bands originating from in situ tensile tests of
Al$_{88}$Y$_{7}$Fe$_{5}$ melt-spun ribbons conducted in a transmission electron
microscope are compared with ones which had formed ex situ during cold rolling.
During in situ straining, the observations of a spearhead-like shear front, a
meniscus-like foil thickness reduction and no apparent shear steps to
accommodate strain suggest shear band initiation by a rejuvenating shear front
followed by shearing along the already softened paths. This leads to necking
and subsequent failure under the reduced constraint of a 2D geometry in the
thin foil and thus explains the observed lack of ductility under tension. In
contrast, shear bands formed during cold rolling display distinct alternating
density changes and shear off-sets. An explanation for this difference may be
that in situ shear bands rip before such features could develop. Moreover, both
in and ex situ experiments suggest that initiation, propagation and arrest of
shear bands occur during different stages.

25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg