Al-Cu-Mg合金电脉冲作用下拉伸实验研究  

Experimental study of Al-Cu-Mg alloy tensile under the action of electric pulse

作　　者：姚雨 徐建新 YAO Yu;XU Jianxin(Department of Engineering Experimental Teaching,Nanjing University of Posts and Telecommunications,Nanjng 210003,Jiangsu China;Nanjing Smart Automation Co.,Ltd.,Nanjing 210003,Jiangsu China;Jiangsu Union Technical Institute,Dongtai 224226,Jiangsu China)

机构地区：[1]南京邮电大学工程实验教学部,江苏南京210003 [2]南京斯玛特自动化有限公司,江苏南京210003 [3]江苏联合职业技术学院东台分院,江苏东台224226

出　　处：《锻压装备与制造技术》2025年第2期102-106,共5页China Metalforming Equipment & Manufacturing Technology

摘　　要：本文通过室温下单轴拉伸实验、电脉冲辅助单轴拉伸实验、金相实验以及SEM实验,研究了脉冲电流对Al-(3.8-4.9)Cu-(1.2-1.8)Mg铝合金的力学性能以及微观组织结构的影响。结果表明,在电流密度达到150 A/mm^(2),材料在153℃时发生动态再结晶,其塑性较室温下提高了47.6%;随着电流密度的增加,材料晶粒细化越明显,断口处韧窝更多、更深,说明脉冲电流具有提高材料塑性、降低动态再结晶温度的作用。In this paper,the effects of pulsed current on the mechanical properties as well as the microstructure of Al-(3.8-4.9)Cu-(1.2-1.8)Mg aluminum alloy were studied by uniaxial stretching experiments at room temperature,electric pulse-assisted uniaxial stretching experiments,metallographic experiments and SEM experiments.The results show that at a current density of 150 A/mm^(2),the material undergoes dynamic recrystallization at 153℃,and its plasticity is increased by 47.6%compared with that at room temperature;with the increase of the current density,the grain refinement of the material becomes more obvious,and the tough nests at the fracture are more and deeper,which indicates that the pulsed current has the effect of increasing the plasticity of the material and decreasing the dynamic recrystallization temperature.

关 键 词：AL-CU-MG合金 拉伸实验 电脉冲 动态再结晶 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]