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Hochtemperatur‐Verschleißversuche am Tribosystem Alloy 80A – Gusseisen mittels Stift‐auf‐Scheibe Anordnung
Author(s) -
Rynio C.,
Hattendorf H.,
Klöwer J.,
Lüdecke H.G.,
Eggeler G.
Publication year - 2013
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201300165
Subject(s) - materials science , superalloy , cast iron , microstructure , alloy , metallurgy , transmission electron microscopy , scanning electron microscope , oxide , composite material , nanotechnology
A pin‐on‐disc wear test rig is described, which allows to extract reproducible mechanical and microstructural wear data from very small sample volumes at temperatures up to 900°C. The friction and wear behavior of Alloy 80A against a cast iron is evaluated at temperatures from ambient to 800°C. The wear rate of Alloy 80A decreased with increasing temperature. This was attributed to the development of protective tribolayers, which prevented a direct contact between the two sliding partners. Energy Dispersive X‐Ray (EDX) mapping of surface wear products and Transmission Electron Microscopy (TEM) results for the evolution of subsurface microstructures are exemplarily presented for wear experiments performed for 10 min at 300°C (frequency: 20 Hz, load: 20 N, stroke: 1 mm). EDX investigations provide a good insight into material transfers and oxide layer generations during sliding wear. TEM‐micrographs revealed cell structure formation and very small nanograins directly beneath the surface.