摘要
通过280℃双道次挤压成功制备了一种高性能Mg-5Li-1Al(质量分数,%)镁锂合金板材,该板材可以实现常温变形.对其组织、织构、力学性能和成形性能做了详细研究.结果表明:在双道次挤压过程中,动态再结晶充分,合金板材的组织均匀细小,从而使板材具有较好的成形性能(断裂延伸率为34%,Erichsen值4.82).这是由于LA51合金所具有的弱基面织构与较高的加工硬化指数所导致的.
The deformation of common Mg alloys is difficult,and the Mg-5Li-1Al(mass fraction,%)alloy sheet with good strength-ductility balance was successfully fabricated by two-pass extruded at 280℃,with good formability.The microstructural evolution,texture,mechanical properties and stretch formability of the extruded sheets were investigated.The results show that a refined microstructure can be obtained by two-pass extrusion due to the dynamic recrystallization(DRX).The extruded sheet exhibits excellent formability with elongation to failure(FE)of 34% and Erichsen value of 4.82.The superior mechanical properties can be attributed to the ultrafine DRX grains and weaken basal texture resulted from the lithium addition.
作者
冯效琰
李瑞红
张晓梅
杨海梅
陈志军
金自立
任慧平
FENG Xiaoyan;LI Ruihong;ZHANG Xiaomei;YANG Haimei;CHEN Zhijun;JIN Zili;REN Huiping(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China;Ministry of Quality,Safety and Environmental Protection,Inner Mongolia First Machinery Group Corporation,Baotou 014030,China;The Tenth Sub-Company,Inner Mongolia First Machinery Group Corporation,Baotou 014030,China)
出处
《内蒙古科技大学学报》
CAS
2020年第2期149-153,176,共6页
Journal of Inner Mongolia University of Science and Technology
基金
内蒙古自治区自然科学基金资助项目(2019MS05037)
教育部春晖计划资助项目(CHJH2018).
关键词
镁锂合金
成形性
织构
塑性
挤压
Mg-Li alloy
formability
texture
ductility
extrusion
