%0 Journal Article
%T IN SITU TEM OBSERVATION OF HYDROGEN-INDUCED CRACKING AND STRESS CORROSION CRACKING FOR Fe_3Al<br>Fe3Al氢致开裂和应力腐蚀的TEM原位观察
%A GU Biao
%A NIE Yifan
%A GAO Kewei
%A CHU guyana
%A <br>谷飚
%A 聂一凡
%A 高克玮
%A 褚武扬
%J 金属学报
%D 1997
%I 
%X The change of dislocation configuration ahead of a loaded crack tip before and after charging with hydrogen, and stress corrosion cracking, and relationship between dislocation and initiation of hydrogen-induced cracking (HIC) for Fe3Al are investigated in TEM using a special constant deflection loading device. The results show that hydrogen can enhance dislocation emission, multiplication and motion, and increase the size of dislocation free zone (DFZ). A nanocrack of HIC will initiate and Dropagae in the DFZ when hydrogen enhanced dislocation emission and motion reach a critical condition. The reasons that hydrogen enhanced dislocation emission and motion, and the mechanism of initiation of HIC have been discussed.
%K Fe3Al
%K hydrogen-enhanced dislocation emission
%K hydrogen-induced crackIng<br>Fe3Al
%K 氢致开裂
%K 应力腐蚀
%K TEM
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=17FA1B774290116175948BF99B0ECBA6&yid=5370399DC954B911&vid=27746BCEEE58E9DC&iid=DF92D298D3FF1E6E&sid=6452E1221020E61F&eid=E5ED9059DE792E50&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=13