Anisotropy of fretting wear performace and microstructure evolution of AZ31 Mg alloy plate
Rolled AZ31 magnesium alloy is one of the most promising bone plate materials,but the influence of crystal texture on fretting wear behavior and the microstructure evolution are not yet clear.The fretting wear tests along different directions were carried out in different planes of AZ31 magnesium alloy with a ball-on-flat contact configuration.The morphology and wear volume of the worn surfaces under different fretting wear cases were characterized using optical microscope(OM),scanning electron microscope(SEM),white light interferometer(WLI)and electron backscatter diffraction(EBSD).And the wear properties and wear mechanism of different cases were analyzed and compared.The results show that the load is carried along the normal direction ND and the fretting is carried along the tangential direction TD(ND-TD),the anti-wear performance is best.The load is carried along the tangential direction TD and the fretting direction is carried along rolling direction RD(TD-RD),the anti-wear performance is the second.When the load is carried along the tangential direction TD and the fretting direction is carried along normal direction ND(TD-ND),the anti-wear performance is the worst.The main wear mechanism is abrasive wear.The microstructure of the zones around and beneath the worn scar,especially{101ˉ2}<112ˉ0>twin,exhibits anisotropy and is closely related to the stress and crystal orientation of the grains,which directly influence their fretting wear performance.
NETL
NSTL
万方数据
