微量Er对Al-Mg-Mn合金组织与力学性能的影响  

Effects of Minor Erbium on Microstructure and Mechanical Properties of Al-Mg-Mn Alloy

作　　者：张晋武[1] 白朴存[1] 侯小虎[1] 李博[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051

出　　处：《航空材料学报》2014年第5期17-24,共8页Journal of Aeronautical Materials

基　　金：国家自然科学基金项目(11362014;10962005;10562003);高等学校博士学科点专项科研基金(20131514110004)

摘　　要：采用半连续铸造法制备Al-6.8Mg-0.3Mn和Al-6.8Mg-0.3Mn-0.4Er(质量分数,%)两种合金铸锭。合金铸锭经均匀化处理—多道次热轧成4mm薄板;研究不同退火温度下微量Er对Al-Mg-Mn合金微观组织与力学性能的影响。结果表明:添加微量Er能显著提高Al-Mg-Mn合金强度,改善合金强度和塑性的配合,能明显提高合金的抗再结晶能力和室温力学性能;Al-Mg-Mn-Er合金板材经300℃退火1h后可获得理想的综合力学性能,其σb、σs与ψ分别为421MPa,310MPa和18.3%。Both AI-6.8 Mg-0.3Mn and A1-6.8Mg-0.3Mn-0.4Er （mass fraction/% ） alloy ingots were prepared with semi-continuous casting process, and the alloy ingots were rolled into 4mm thick sheets after homogenization treatment and muhipass hot roiling. The effect of Er on microstructure and mechanical properties of A1-Mg-Mn alloy sheets at different annealing temperatures were investigated. The results show that the addition of minor Er can improve the strength of the A1-Mg-Mn alloy significantly as well as the coordination between strength and plasticity of the alloy. Besides, the ability of anti-recrystallization and mechanical properties at room temperature are largely enhanced. Finally by annealing at 300℃ for lh, the A1-Mg-Mn-Er alloy sheet obtains the optimum application values of σb , σs and ψ, which are 421MPa, 310MPa and 18.3% respectively.

关 键 词：Al-Mg-Mn-Er合金 稳定化退火 再结晶 显微组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程]