%0 Journal Article
%T LOW-CYCLE FATIGUE BEHAVIOR OF AS-EXTRUDED Mg-x%Al-3%Ni ALLOYS<br>挤压变形Mg-x%Al-3%Ni合金的低周疲劳行为
%A CHEN Lijia
%A WANG Xin
%A ZHI Ying
%A XU Yanwu School of Materials Science
%A Engineering
%A Shenyang University of Technology
%A Shenyang
%A <br>陈立佳
%A 王鑫
%A 智莹
%A 徐颜武
%J 金属学报
%D 2009
%I 
%X Due to the low density, high specific strength and stiffness, magnesium alloys are being considered for automotive and aerospace applications. The structural applications of magnesium components need a decent low--cycle fatigue performance, because cyclic loading is often encountered. In order to identify the low--cycle fatigue behavior of the newly developed Mg--x%Al--3%Ni(x=4, 5, 6, 7, mass fraction) extruded magnesium alloys with different contents of Al, the total strain--controlled low--cycle fatigue tests were performed at room temperature. The cyclic stress response, strain fatigue life and cyclic stress--strain behaviors were investigated for the hot--extruded Mg--x%Al--3%Ni alloys. The results of the low--cyclic fatigue tests show that the hot--extruded Mg--x%Al--3%Ni alloys exhibit the cyclic strain hardening during fatigue deformation. The dependences of the strain fatigue life on plastic strain amplitude and elastic strain amplitude can be described by the Coffin--Manson and Basquin equations, respectively. In the hot extruded Mg--x%Al--3%Ni alloys with different contents of Al, the extruded Mg--5%Al--3%Ni alloy gives the longest fatigue life and the highest fatigue resistance. In addition, a linear relation between the cyclic stress amplitude and cyclic strain amplitude can be noted for the hot--extruded Mg--x%Al--3%Ni alloys.
%K &prev_q=x%Al--3%Ni alloyzz')" href="#">" target="_blank">x%Al--3%Ni alloyzz')" href="#">
%K Mg--x%Al--3%Ni alloy
%K hot--extrusion
%K cyclic stress response
%K fatigue life
%K cyclic stress--strain<br>Mg--x%Al--3%Ni合金
%K 热挤压
%K 循环应力响应
%K 疲劳寿命
%K 循环应力--应变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=574D52ACC7265E8AB40B044559AAB4FD&yid=DE12191FBD62783C&vid=94E7F66E6C42FA23&iid=DF92D298D3FF1E6E&sid=353B961D86F026C0&eid=E9F71A2A3584AD5D&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=13