Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low cycle fatigue of a nickel based superalloy at high temperature:
  deformation microstructures   The microstructural characteristics of a single crystalline nickel based
superalloy (AM1) tested under high temperature fatigue at 950$^\circ$C are
reported. For repeated fatigue (R$_\varepsilon$=0) through a range of cycle
numbers N with imposed total strain amplitude $\Delta\varepsilon^t$, two main
types of behaviour are found depending on N and $\Delta\varepsilon^t$. This
allows a map of microstructures versus the number of cycles N and
$\Delta\varepsilon^t$ to be constructed. A domain called A presents anisotropic
microstructures due either to a partition of the plasticity throughout the k
channels, or to an oriented coarsening of the k% precipitates of the so-called
type N (rafts perpendicular to the loading axis). The domain called H shows
homogeneous deformation microstructures. The coarsening observed in repeated
fatigue is accounted for on the basis of a model proposed earlier in the
literature by V\'eron. Alternate fatigue (R$_\varepsilon$ = -1) also leads to
the same type of coarsening, even for a very low number of cycles (N=113). The
microstructures observed are ascribed to internal stress effects and are
related to the possible shearing of the precipitates and to different diffusion
processes.

12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex