%0 Journal Article
%T SHORT FATIGUE CRACK BEHAVIOUR IN ISO-STRESS SPECIMENS<br>一种等应力试样中的疲劳短裂纹行为
%A HONG Youshi
%A LU Yonghua
%A ZHENG Zhemin C M Cheng Institute of Mechanics
%A Academia Sinica
%A Beijing Institute of Mechanics
%A Academia Sinica
%A Beijing
%A <br>洪友士
%A 吕永华
%A 郑哲敏
%J 金属学报
%D 1990
%I 
%X The fatigue tests were made on the specially designed specimens by avibration testing machine to investigate the initiation and propagation features ofshort fatigue cracks in a weld metal. The specimens were prepared of a kindof triangular shape in which the surface tensile stress is a constant. The resultsshow that the short fatigue cracks originate from the slip bands and initiate insidethe ferrite grains. The development of short fatigue cracks is marked by the grad-ual increase in crack density with fatigue cycles. The coalescence between shortcracks leads to crack propagation and the crack path is predominantly transgranular.
%K iso-stress specimen
%K short fatigue crack
%K weld metal<br>等应力试样
%K 疲劳短裂纹
%K 焊接金属
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=9260461CBD7B7665E645951619AE0EC7&yid=8D39DA2CB9F38FD0&vid=96C778EE049EE47D&iid=CA4FD0336C81A37A&sid=D997634CFE9B6321&eid=286FB2D22CF8D013&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1