您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

[PDF Download]    [Flash Online]

    

Particle shape effects on ductility of
SiC particle reinforced LD2
matrix composites investigated
by AFM-based nanoindentation
LIU Cheng(刘 瀓)1, ZHANG Guo-ding(张国定)1, M. Naka2

1. State Key Laboratory of Metal Matrix Composites,
Shanghai Jiaotong University,Shanghai 200030, P.R.China;
2. Joining and Welding Research Institute of
Osaka University, Osaka 567-0047, Japan

Abstract:An AFM (Atomic Force Microscope)-based nanoindentation method for local measurement of mechanical properties near interfaces in both angular and blunted SiC particle reinforced LD2 composites is presented. The blunted composite exhibits an improved ductility than the angular counterpart. The nanoindentation examination shows that the micromechanical properties near interfaces distribute unevenly and vary with particle shape in the SiCp/LD2 composites. There are a higher nanohardness value and a lower plastic deformation capacity around an angular particle than around a blunted one. It is inferred that the residual stress and strain concentrations are severer around the angular particle, which causes matrix cracking at a lower external strain level and leads to a lower ductility of the angular composite.

 

Key words: micromechanical properties; nanoindentation; interface; ductility

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn