%0 Journal Article
%T The Role of Particles in Fatigue Crack Propagation of Aluminum Matrix Composites and Casting Aluminum Alloys
%A Zhenzhong CHEN
%A Ping HE
%A Liqing CHEN
%A <br>Zhenzhong
%A CHEN
%A Ping
%A HE
%A Liqing
%A CHEN
%J 材料科学技术学报
%D 2007
%I 
%X Fatigue crack propagation (FCP) behaviors were studied to understand the role of SiC particles in 10 wt pct SiCp/A2024 composites and Si particles in casting aluminum alloy A356. The results show that a few particles appeared on the fracture surfaces in SiCp/Al composites even at high AK region, which indicates that cracks propagated predominantly within the matrix avoiding SiC particles due to the high strength of the particles and the strong particle/matrix interface. In casting aluminum alloy, Si particle debonding was more prominent.Compared with SiCp/Al composite, the casting aluminum alloy exhibited lower FCP rates, but had a slight steeper slope in the Paris region. Crack deflection and branching were found to be more remarkable in the casting aluminum alloy than that in the SiCp/Al composites, which may be contributed to higher FCP resistance in casting aluminum alloy.
%K Aluminum-matrix composites
%K Casting alloy
%K Fatigue crack propagation
%K Particle<br>铝基复合材料
%K 铸造铝合金
%K 颗粒
%K 疲劳
%K 裂纹扩展
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=6F50260F9EE22874&yid=A732AF04DDA03BB3&vid=EA389574707BDED3&iid=0B39A22176CE99FB&sid=527AEE9F3446633A&eid=CEC789B3C68C3BB3&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=4&reference_num=18