Nd60Al10Fe20Co10金属玻璃的变形行为

稀有金属材料与工程, 2005, 34(3): 371-374.

Nd60Al10Fe20Co10金属玻璃的变形行为

喻更生 ^1, , 李伏 ^2, , 魏炳忱 ^3, , 马蓦 ^4, , 林建国 ^5,

1.湘潭大学,湖南,湘潭,411105

2.湘潭大学,湖南,湘潭,411105

3.中国科学院力学研究所微重力国家实验室,北京,100080

4.湘潭大学,湖南,湘潭,411105

5.湘潭大学,湖南,湘潭,411105

基金项目: 中国科学院资助项目(50101012) 湖南省杰出青年科学基金(02JJyB010)

关键词：大块金属玻璃 , 力学性能 , 玻璃转变

Deformation Behavior of Nd60Al10Fe20Co10 Bulk Metallic Glass

利用材料测试系统(MTS)、X-Ray衍射(XRD)和扫描电镜(SEM)等手段研究了Nd基大块金属玻璃的变形行为和断裂特征.Nd基大块金属玻璃样品在室温下是脆性断裂,大约在500 K时变形模式从非均匀变形转变为均匀变形,在523 K以上表现出显著的塑性变形.在5×10-4 m/s的应变速率下,这种Nd基大块金属玻璃材料在523 K～600 K之间出现明显的屈服应力下降现象,随后进入1种稳定的粘性流动状态,而且这种屈服下降现象与温度和应变速率有关.这种在过冷液相区的变形行为与其他大块金属玻璃变形特征相似.合金的这种塑性变形行为表明了其存在稳定的过冷液相区,同时对其变形行为的研究有助于进一步了解Nd基大块金属玻璃的反常热稳定性.

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材料期刊网

Nd60Al10Fe20Co10金属玻璃的变形行为

Deformation Behavior of Nd60Al10Fe20Co10 Bulk Metallic Glass

参考文献