%0 Journal Article
%T IN-SITU OBSERVATIONS ON DISLOCATION BEHAV IOR AND THE EFFECT OF HYDROGEN NEAR THE CRACK-TIP IN Fe-3%Si SINGLE CRYSTAL BY TEM<br>Fe—3%Si 单晶体裂纹尖端位错行为及氢效应的 TEM 动态观察~*
%A SUI Guoxin XU Yongbo ZHOU Jing HA Kuanfu WANG Zhongguang
%A <br>隋国鑫
%A 徐永波
%A 周敬
%A 哈宽富
%A 王中光
%J 材料研究学报
%D 1991
%I 
%X Dislocation behavior and effect of hydrogen have been observed near thecrack-tip in Fe-3%Si single crystal during in-situ deformation in an electron microscope.It has been found that a number of dislocations were emitted from the crack-tip duringdeformation and moved away quickly from the crack-tip region creating a dislocation-freezone (DFZ).The dislocations stored in the plastic zone were in a form of an inversepile-up.The propagation of the crack-tip includes two processes,i.e.the plastic process inwhich a number of dislocations were emitted from the crack-tip by crack-tip deformationand the brittle process in which the cleavage of DFZ occured.The solute hydrogen can change the distribution of dislocations near the crack-tip andcan lead to the diminution and even disappearance of the DFZ.
%K dislocation
%K dislocation-free zone(DFZ)
%K local stress intensity factor
%K hydrogen embrittlement
%K plasticity<br>位错
%K 无位错区
%K 局部应力强度因子
%K 氢脆
%K 塑性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=0D149413F3BDDD22&yid=116CB34717B0B183&vid=94C357A881DFC066&iid=E158A972A605785F&sid=51C74DF6A16DA45B&eid=AA5FB09E1F81059E&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=1