单级时效处理对6082铝合金型材微观组织的影响  

Effect of single-stage aging treatment on microstructure of 6082 aluminum alloy profile

作　　者：王宏明[1] 杨广林 李桂荣[1] 潘亚明 WANG Hongming;YANG Guanglin;LI Guirong;PAN Yaming(School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China;Jiangsu Zhenhexiang New Material Co., Ltd., Changzhou, Jiangsu 213011, China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏祯和祥新材料科技有限公司,江苏常州213011

出　　处：《江苏大学学报（自然科学版）》2020年第4期434-439,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51174099)。

摘　　要：为优化时效处理参数,探索时效处理对材料的强韧化影响机制,通过扫描电镜(SEM)、X射线衍射(XRD)和电子背散射衍射(EBSD)研究了单级时效处理对6082铝合金挤压型材微观组织演变的影响.结果表明:时效处理可以使6082铝合金棒材挤压成型材的过程中储存的残余应力得到有效去除,晶粒出现细微长大现象,平均尺寸由7.02μm增长为9.80μm;平均晶界角度降低,从25.51°降到16.06°,低角度晶界比例显著提高,从47.91%提高至67.47%;时效处理可以使晶粒{100}和{110}方向的晶粒分布发生明显的变化,明显增强了试样在{100}和{110}方向的织构.这些转变有利于6082铝合金挤压型材综合性能的提高.To optimize the aging treatment parameters and explore the strengthening and toughing mechanism of aging treatment,the effects of single-stage aging treatment on the microstructure evolution of 6082 extruded aluminum alloy profiles were investigated by scanning electron microscopy(SEM),X-ray diffraction(XRD)and electron backscatter diffraction(EBSD).The results show that the aging treatment can effectively reduce the residual stress stored during the extrusion deformation process.The crystalline grain grows slightly with average size increased from 7.02μm to 9.80μm.The average crystalline grain boundary angle is decreased from 25.51°to 16.06°,and the low angle grain boundary ratio is markedly increased from 47.91%to 67.47%.The aging treatment can significantly change the grain distribution in the{100}and{110}directions of the crystalline grain,which remarkably enhances the texture of the sample in the{100}and{110}directions.These changes are conducive to the improvement of the performance of 6082 aluminum alloy extruded profiles.

关 键 词：6082铝合金型材 时效处理 残余应力 微观组织 位错强化 

分 类 号：TG166[金属学及工艺—热处理]