Komsomolsk-on-Amur State Technical University, Komsomolsk-on-Amur, Russia:

O. V. Bashkov, Assistant Professor, Head of a Chair of Materials Science and New Materials Technology, e-mail: bashkov_ov@mail.ru
T. I. Bashkova, Assistant Professor of a Chair of Materials Science and New Materials Technology
A. A. Popkova, Post-Graduate Student

Institute of Automation and Control Processes of Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia:

R. V. Romashko, Leading Researcher

This paper shows the investigation results of accumulation staging of damages and fatigue rupture of aluminium precipitation hardening alloy D16AT (Д16АТ) using acoustic emission method. The prime object of investigations was the development of the design method of integrated fatigue diagram, characterizing the stage accumulation of fatigue damages. There were carried out the investigations, aimed at the experimental check of the hypothesis about the staging of accumulation of damages, which may be set only according to the registered parameters of acoustic emission with separate analysis by the types of acoustic emission sources. In contrast to the research method, where the fractography analysis is carried out, application of acoustic emission method allows the significant reduction of the scope of testing. Identification of the sources of accumulation of damages (dislocations, micro- and marcocracks) was carried out by the results of earlier investigations of deformation staging in the conditions of static tension of various metals and alloys. The types of acoustic emission sources were considered on twoparameter distribution plane “acoustic emission signals energy — frequency parameter”. This paper shows the diagrams of separate accumulation of acoustic emission signals, obtained from various types of sources (dislocations, micro- and marcocracks). Fatigue accumulation stages were defined by the activity of various sources of acoustic emission signals. Integrated fatigue diagram of aluminium alloy D16AT was designed by the defined stages. The developed method considerably reduces the volume of the carried out fatigue tests and fractography investigations.
The investigation was carried out with the support of the grant of Russian scientific fund (project No. 14-12-01122) and the basic part of the state task (project No. 3817).

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