Analysis of the Effect of the Wearing Type on Surface Structural Changes of Ni₃Al-Based Intermetallic Alloy

Abstract:

Results of an analysis of effect of wearing type on surface structural changes of a Ni₃Al intermetallic alloy, are shown in the present paper. A microstructure evaluation was carried out by Quanta 3D FEG field emission gun scanning electron microscope (FEG SEM) equipped with an integrated EDS/WDS/EBSD system. The Ni₃Al-based intermetallic alloy with an addition of boron, zirconium and chromium was examined. The investigated material had γ’ single-phase, ordered solid solution structure with 20 μm grain size. An electron backscatter diffraction (EBSD) method was applied to visualize surface structural changes upon an abrasive, a cavitational and a tribological wearing of the material.An observation of surface layer after the abrasive wear was carried out on samples examined in loose abradant by T-07 tester and according to GOST 23.2008-79 norm. An analysis of cavitational wear on changes in the near surface area of Ni₃Al-based alloy was performed on an impact-jet stand. Observed structural changes were described based on results of the SEM/EBSD complex structural examination and hardness measurements. It was found, that the EBSD is an effective and sensitive method that allows estimating surface strain introduced during analyzed wearing types.

• Periodical: Solid State Phenomena (Volume 225)
• Pages: 25-32
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.225.25
• Online since: December 2014
• Authors: Dariusz Zasada, Wojciech Polkowski, Robert Jasionowski*
• Keywords: Cavitation, Intermetallic Alloy, Tribological Wearing

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