The pin-on-disc wear behavior of nanostructured two-phase Fe_(30)Ni_(20)Mn_(20)Al_(30) and eutectic lamellar-structured Fe_(30)Ni_(20)Mn_(35)Al_(15) is compared emphasizing the influence of the microstructure and mechanical properties of alloys as well as the effect of test environment. Although the wear of both alloys was greater in oxygen-containing environments, eutectic Fe_(30)Ni_(20)Mn_(35)Al_(15) is less sensitive to oxygen than nanostructured Fe_(30)Ni_(20)Mn_(20)Al_(30). Abrasive wear dominated during the wear in all cases, while plastic deformation also occurred during the wear of eutectic Fe_(30)Ni_(20)Mn_(35)Al_(15). A tribolayer of zirconia, which was embedded in the surface of the wear pin, was characterized using a scanning transmission electron microscope equipped with an energy dispersive spectrometer.
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