Affiliation:
1. Volgograd State Technical University
Abstract
The results of modeling of the influence of layers thickness of the Ni-Cr-Al composite on value of thermal stresses on its interlayer boundaries after diffusion annealing are presented. It is shown that the cooling of the AD1-Cr20Ni80 composite after annealing, which provides formation of a DZ at its interlayer boundary, consisting of three interlayers (CrAl7, NiAl3 + CrAl7 and Ni2Al3 + CrAl7), leads to spontaneous separation of the aluminum layer,due to the action of tensile stresses, exceeding the zone strength of the interlayer boundaries (CrAl7) - (NiAl3 + CrAl7), and at k> 0.3 - (NiAl3 + CrAl7) - (Ni2Al3 + CrAl7) with the ratio of layers thickness of aluminum and the alloy Cr20Ni80 - k <0.3, which leads to the formation of layered Cr20Ni80 / ( Ni2Al3 + CrAl7) / (NiAl3 + CrAl7) or Cr20Ni80 / (Ni2Al3 + CrAl7) coatings.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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