RESEARCH OF THE PLASTIC FLOW OF ELECTROLYTICALLY SATURATED WITH HYDROGEN (He) Al-Cu-Mg ALLOY

S. Barannikova, L. Zuev, Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences (ISPMS SB RAS) and National Research Tomsk State University «TSU» ; A. Bochkareva, A. Lunev, ISPMS SB RAS and National Research Tomsk Polytechnic University «TPU»; Yu. Li, ISPMS SB RAS; G. Shlyakhova, ISPMS SB RAS and Seversk Technological Institute branch of State Autonomous Educational Institution of Higher Professional Education, Russian Federation The effect of hydrogen embrittlement on the plastic flow of Al-Cu-Mg alloy was investigated (HE). The studies were performed for the test samples of aluminum alloy subjected to electrolytic hydrogenation in a three electrode electrochemical cell. It is found that the mechanical properties and plastic flow curves of aluminum alloy are affected adversely by HE. These are found to show all the plastic flow stages: the linear, parabolic and pre-failure stages. It is established that the hydrogenation enhances the localization of straining leads to significant changes in the characteristics distances between local straining zones. The patterns of localized plasticity appear to be useful for a detailed analysis of plasticity exhibited by aluminum alloys.