%0 Journal Article
%T The super-long fatigue behavior of the as-extruded ZK60 magnesium alloy<br>挤压态镁合金ZK60的超高周疲劳行为
%A Xu Dao-Kui
%A <br>许道奎
%A 刘路
%A 徐永波
%A 韩恩厚
%J 金属学报
%D 2007
%I 
%X In the super-long fatigue life regime (106~109 cyc), the fatigue behavior of the as-extruded ZK60 Mg alloy was studied. The results revealed that a plateau existed in the regime of 5×106 ~ 108 cyc, whereas the fatigue strength gradually decreased in the regime of 108~109 cyc, and the fatigue strength corresponding to 109 cyc was 90±5MPa. SEM fracture observation indicated that the fatigue crack mostly initiated at the surface or subsurface for the samples failed in the regime of 5×106 ~108 cyc, and at the interior non-metallic inclusion for the samples failed between 108 and 109 cycles. According to the observation and determination of the region size of the crack initiation, the fatigue strength was estimated, and compared with the experimental result.
%K Mg alloy
%K ultra-high cycle fatigue
%K non-metallic inclusion
%K fatigue strength<br>镁合金
%K 超高周疲劳
%K 非金属夹杂
%K 疲劳强度
%K 挤压态
%K 镁合金
%K 超高
%K 疲劳行为
%K MAGNESIUM
%K ALLOY
%K FATIGUE
%K BEHAVIOR
%K 缺陷
%K 组成
%K 最大夹杂物尺寸
%K 起裂
%K 微裂纹
%K 实验
%K 估算
%K 疲劳源
%K 测定
%K 非金属夹杂物
%K 表面
%K 试样
%K 疲劳裂纹
%K 观察表
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=874A1CE7C8235F7FC27611C0D2AC7967&yid=A732AF04DDA03BB3&vid=BE33CC7147FEFCA4&iid=0B39A22176CE99FB&sid=3986B25773CB6C30&eid=856C2E13D1000DB7&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=13