Fe-Co-B-Si-Nb-Cr块体非晶合金在纳米压痕过程中的变形行为  

Deformation behaviour of Fe-Co-B-Si-Nb-Cr bulk amorphous alloy during nanoindentation

作　　者：张志纯[1,2] 龙志林[1,3,4] 危洪清[4] 彭建[4] 许福[4] 李乡安[4] 

机构地区：[1]湘潭大学材料与光电物理学院,湘潭411105 [2]湘潭大学能源工程学院,湘潭411100 [3]湘潭大学材料设计与制备技术湖南省重点实验室,湘潭411105 [4]湘潭大学土木工程与力学学院,湘潭411105

出　　处：《中国有色金属学报》2009年第7期1310-1315,共6页The Chinese Journal of Nonferrous Metals

基　　金：湖南省自然科学基金资助项目(09JJ6069);湖南省科技厅计划资助项目(2008FJ3095);湖南省教育厅资助科研项目(09A088;08C880;08C893)

摘　　要：利用纳米压痕技术研究直径为3mm的{[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4块体非晶合金的变形行为以及加载速率对其塑性变形行为的影响规律。结果表明:该块体非晶合金在低加载速率下表现出显著的锯齿流变,而在高的加载速率下表现为连续的塑性变形;在纳米压痕过程中,该块体非晶合金出现室温蠕变现象,且其硬度值随着加载速率的增大而减小。The deformation behaviour of {[（Fe0.6Co0.4）075B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy with a diameter of 3 mm and the influence of loading rate on its plastic deformation were investigated by the technique of nanoindentation. The results show that the {[（Fe0.6Co0.4）075B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy exhibits prominent serrated flow at low loading rate while the plastic deformation is continuous at high loading rate. During nanoindentation, the room temperature creep of the {[（Fe0.6Co0.4）075B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy is observed, and its hardness decreases with the increase of loading rate.

关 键 词：块体非晶合金 纳米压痕 锯齿流变 蠕变 

分 类 号：TG139.8[一般工业技术—材料科学与工程]