Transactions of Materials and Heat Treatment

Title：Finite element analysis and experimental research on Mg-Li alloy treated by equal channel angular extrusion

Authors： BAI Pu-cun1 2 WU Zao-qin1 ZHANG Xiu-yun1 REN Yong-gang2 (1.School of Materials Science and Engineering Inner Mongolia University of Technology Hohhot 010052 China 2.202 Plant China National Nuclear Corporation Baotou 014000 China)

Unit：

KeyWords： Mg-Li alloy equal channel angular extrusion equivalent strain friction coefficient extruding speed

ClassificationCode：TG379

year,vol(issue):pagenumber：2008,33(3):44-47

Abstract：

Equal channel angular extrusion of Mg-Li alloy was investigated by finite element method and experiment method.The simulation result shows that deformation of the whole sample is heterogeneous when the extruding speed or the friction coefficient becomes larger gradually.Experimental result shows that increasing the extruding speed without lubricant,the shape of surface crack of fish scale type is found along the axial direction paralleled to the shear plane.The surface of sample lubricated with colloidal graphite is smooth and no crack appeared.The grain size of α phase in the Mg-Li alloy is reduced to 10 μm from 20 μm.

Funds：

内蒙古自治区自然科学基金资助项目(200408020707);; 内蒙古自治区高等学校科学研究项目(200705046)

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