Journal
WEAR
Volume 482, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2021.203983
Keywords
Sliding wear; Intermetallics; Non-ferrous metals; Electron microscopy
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The wear properties of extruded Mg-Zn-Y alloys with a long-period stacking ordered (LPSO) phase were studied during lubricated pin-on-disc type tests. It was found that the presence of a fine plate-like LPSO phase inside the alpha-Mg grains has effects on wear mass loss and can delay dynamic crystallisation of alpha-Mg grains.
The wear properties of extruded Mg-Zn-Y alloys containing a long-period stacking ordered (LPSO) phase were investigated during lubricated pin-on-disc (POD) type tests. The Mg96Zn2Y2 alloy with uneven LPSO-phase layers and alpha-Mg grains, including fine plate-like LPSO phase, exhibited smaller wear mass loss compared to that of the Mg97Zn1Y2 alloy without the fine plate-like LPSO phase. Transmission electron microscopy at the worn subsurface layer revealed that the dynamic crystallisation of the alpha-Mg grains increased the wear mass loss. The presence of a fine plate-like LPSO phase inside the alpha-Mg delayed the dynamic crystallisation of alpha-Mg grains under the lower normal load while it reduced the thickness of the dynamically crystallised layer after sliding deformation under the higher normal load in the Mg96Zn2Y2 alloy.
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