Comparative study on fretting wear behaviors of Alloy 600MA in dry air and deionized water conditions

Abstract

Abstract Fretting wear behaviors of Alloy 600MA in dry air and deionized water conditions were investigated. Results indicated that partial slip regime (PSR) and gross slip regime (GSR) were separated in running condition fretting map (RCFM). In deionized water, the boundary of PSR/GSR shifted into lower amplitude. In material response fretting map (MRFM), the cracking and particle detachment were characterized. In dry air, white etching layer (WEL) transformation resulted in the crack propagation in PSR and the formation of wear debris layer (WDL) in GSR. In deionized water, WEL was more difficult to be formed, resulting in shorter crack and smaller thickness of WDL. In nanostructured WDL, there were non-stoichiometric oxides of NiO, (Ni,Fe)(Fe,Cr)2O4 and Cr2O3 for dry air. The unoxidized phase of (Ni, Cr, Fe) coupled with non-stoichiometric oxides existed in WDL for deionized water.