Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical gradients across phase boundaries between martensite and
  austenite in steel studied by atom probe tomography and simulation   Partitioning at phase boundaries of complex steels is important for their
properties. We present atom probe tomography results across martensite /
austenite interfaces in a precipitation-hardened maraging TRIP steel (12.2 Mn,
1.9 Ni, 0.6 Mo, 1.2 Ti, 0.3 Al; at.%). The system reveals compositional changes
at the phase boundaries: Mn and Ni are enriched while Ti, Al, Mo, and Fe are
depleted. More specific, we observe up to 27 at.% Mn in a 20 nm layer at the
phase boundary. This is explained by the large difference in diffusivity
between martensite and austenite. The high diffusivity in martensite leads to a
Mn-flux towards the retained austenite. The low diffusivity in the austenite
does not allow accommodation of this flux. Consequently, the austenite grows
with a Mn-composition given by local equilibrium. The interpretation is based
on DICTRA and mixed-mode diffusion calculations (using a finite interface
mobility).

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The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org