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- W260636929 abstract "Creep tests of the extruded Mg–9Gd–8Y–2Nd–1.2Zr–T5 were carried out under different stresses at 250 °C. The relationship between microstructures and creep resistance of the alloy was studied. The result shows that the extruded Mg–9Gd–8Y–2Nd–1.2Zr–T5 has the excellent creep resistance at 250 °C. The steady-state creep rate increases from 3.92E−09 to 2.27E−08 with increasing stress from 40 MPa to 100 MPa and is insensitive to the stress. The grain boundary sliding is considered as the main creep mechanism of the extruded Mg–9Gd–8Y–2Nd–1.2Zr–T5 at 250 °C. The large amounts of β′ phase with good heat stability precipitates in the grain of the extruded Mg–9Gd–8Y–2Nd–1.2Zr–T5, inhibits the dislocation sliding and grain boundary sliding, and increases creep resistance. The transformation of β′ phase to β phase and the appearance of the precipitate-free zone during creep process are related to grain boundary sliding accompany with precipitates dragged and dissolution. The reduction in the numbers of β′ phase, the appearance of the precipitate-free zone and the β phase with thick lath shape precipitating at grain boundary reduce creep resistance and deteriorate the creep property." @default.
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- W260636929 date "2015-07-01" @default.
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- W260636929 title "Effect of precipitates on creep behavior of the extruded Mg–9Gd–8Y–2Nd–1.2Zr–T5 at 250°C" @default.
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- W260636929 doi "https://doi.org/10.1016/j.msea.2015.05.016" @default.
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