24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相組成。隨著離心半徑和離心轉(zhuǎn)速的增大，Mg-10Gd-3Y-1Sn合金的晶粒尺寸逐漸減小，抗拉伸強(qiáng)度逐漸增大。在700 r/min下制備的熱軋?jiān)嚇釉谑覝叵聵O限抗拉伸強(qiáng)度為304 MPa，在300 ℃下極限抗拉伸強(qiáng)度為296 MPa。Mg24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相具有優(yōu)異的熱穩(wěn)定性，因而Mg-10Gd-3Y-1Sn合金具有優(yōu)異的高溫抗拉伸強(qiáng)度。;The Mg-10Gd-3Y-1Sn alloys were prepared by centrifugal casting and hot rolling, and their microstructure and mechanical properties were investigated by X-ray diffraction, optical microscope, scanning electron microscope, and tensile tests. Results show that the centrifugal-cast Mg-10Gd-3Y-1Sn alloy consists of α-Mg, Mg24(Gd,Y)5, Mg2(Sn,Y)3Gd2, and Mg3(Gd,Y) phases. With increasing the centrifugal radius and rotation speed, the tensile strength of alloys is increased gradually due to the decreased grain size of alloys. The ultimate tensile strength of as-rolled alloys after centrifugal casting with the rotation speed of 700 r/min is 304 and 296 MPa at room temperature and 300 °C, respectively. The improved tensile strength of Mg-10Gd-3Y-1Sn alloy at elevated temperatures mainly results from the Mg24(Gd, Y)5, Mg2(Sn, Y)3Gd2, and Mg3(Gd, Y) phases with excellent thermal stability."/>