The high temperature creep behavior of Mg-5Li-3Alo2Zn-2Cu alloy
The room-temperature mechanical properties of the extruded Mg-5Li-3Al-2Zn-2Cu alloy (LAZ532-2Cu) were researched previously.In this paper,the creep behavior of the extruded LAZ532-2Cu alloy was studied at the temperature range from 398K to 448K,with the stress 60MPa,80MPa and 100MPa.The microstructure of the alloy consists of the matrix t-Mg solid solution and the intermetallic compounds on the grain boundary or in the grain.The microstru ctural analysis of the alloy reveals the correlation between microstructure and creep properties.The stress exponent n 3.72,4.8,6.1,the activation energy Qc 94.8kJ/mol,123.9kJ/mol,128 kJ/mol were calculated at the test condition.The creep test samples were combined with detailed transmission electron microscopy and X-ray diffractometry in order to characterize the precipitated AILi phase,which contributes to the creep resistance by obstructing the dislocation movement in dislocation creep.
Mg-Li alloys creep property microstructure aging strengthening
Tingqu.Li Xiangling.Liu Zhanyi.Cao
College of Mechanical and Electrical Engineering,Jilin Institute of Chemical Technology,NO.45 Chengd College of Materials Science and Engineering,Changchun University of Technology,Changchun The Key Laboratory of Automobile Materials,Ministry of Education,Department of Materials Science and
国际会议
郑州
英文
66-69
2013-10-19（万方平台首次上网日期，不代表论文的发表时间）