%0 Journal Article
%T Effect of structure defects on the surface craters induced by high current pulsed electron beam<br>结构缺陷对电子束诱发纯铝表面熔坑的影响
%A GUAN Qingfeng
%A AN Chunxiang
%A ZHANG Qingyu
%A DONG Chuang
%A ZOU Guangtian
%A <br>关庆丰
%A 安春香
%A 张庆瑜
%A 董闯
%A 邹广田
%J 材料研究学报
%D 2005
%I 
%X The pure aluminum in various pre-deformation extents was irradiated with 4 J/cm2 energy density using a high-current pulsed electron beam (HCPEB) source. The effect of the structure defects on the crater formation was investigated using optical microscopy and scanning electron microscopy (SEM). The temperature rises faster at a subsurface layer than that at the outermost surface due to the maximum energy deposition located at subsurface depth of the beam. The crater distribution density along the grain boundary and slipping band of dislocation were determined. The crater distribution density increases with increasing the pre-deformation extents of the aluminum sample, and the crater prefers to form at the structure defects such as grain boundary and slipping band of dislocation, which seem to be embryos for craters.
%K surface and interface in the materials
%K high-current pulsed electron beam
%K structure defect
%K pure aluminum
%K crater
%K pre-deformation<br>材料表面与界面
%K 强流脉冲电子束
%K 结构缺陷
%K 纯铝
%K 熔坑
%K 预变形
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=FF8E3A9E93E4ABCE&yid=2DD7160C83D0ACED&vid=2A8D03AD8076A2E3&iid=94C357A881DFC066&sid=2B25C5E62F83A049&eid=E3C3E274D87A8C16&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=1&reference_num=14