Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A combinatorial approach for studying the effect of Mg concentration on
  precipitation in an Al-Cu-Li alloy   We apply a combinatorial approach to study the influence of Mg concentration
on the precipitation kinetics in an Al-Cu-Li alloy using a diffusion couple
made by linear friction welding. The precipitation kinetics is monitored in the
composition gradient material using simultaneous space and time-resolved
in-situ small-angle X-ray scattering measurements during ageing, and the
strengthening of the precipitates is evaluated by micro-hardness profiles. This
data provides an evaluation of the amount of Mg necessary to promote
precipitation of the T1-Al2CuLi phase.

30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics