5083铝合金微米级第二相和再结晶组织的三维表征  

Three-dimensional characterization of micron second-phases and recrystallized structure in 5083 aluminum alloy

作　　者：韩小磊 车聪 杜志伟 王国军 路丽英[4] 贾荣光 彭永刚 HAN Xiaolei;CHE Cong;DU Zhiwei;WANG Guojun;LU Liying;JIA Rongguang;PENG Yonggang(National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials,Beijing 100088,China;Guobiao(Beijing)Testing and Certification Co.,Ltd.,Beijing 100088,China;Chinalco Research Institute of Science and Technology Co.,Ltd.,Beijing 102209,China;Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]国家有色金属及电子材料分析测试中心,北京100088 [2]国标(北京)检验认证有限公司,北京100088 [3]中铝科学技术研究院有限公司,北京102209 [4]东北轻合金有限责任公司,哈尔滨150060

出　　处：《材料工程》2025年第4期98-106,共9页Journal of Materials Engineering

基　　金：国家工业和信息化部资助国家新材料测试评价平台建设项目(TC170A5SU-1)。

摘　　要：微米级第二相和再结晶组织对5083-O态合金韧性、强度等性能有重要影响。为获取5083铝合金中微米级第二相和再结晶组织的三维形貌特征,基于双束显微镜系统采集了5083-O态合金多切片在5 kV加速电压下的能谱(EDS)数据和在20 kV下的电子背散射衍射(EBSD)数据。应用Avizo软件对EDS和EBSD数据进行了三维重构。应用三维重构软件获取了合金中主要微米级第二相Mg_(2)Si相和富Fe相的尺寸、形态、分布、体积分数等信息。结果表明:5083-O态铝合金中Mg_(2)Si相、富Fe相和再结晶组织的体积分数分别为0.46%,0.25%和11.7%。Mg_(2)Si相形状多为近球形、近椭球形或棒状,沿轧向伸长,表面较为圆滑;合金中富Fe相棱角分明,球形度相对较低;三维EBSD的结果表明小尺寸再结晶组织颗粒的球形度大,大尺寸的再结晶组织颗粒的球形度小;在退火过程中,再结晶颗粒是由球形小颗粒开始长大的,再结晶颗粒沿轧向生长最快;三维EBSD结果更真实地反映了再结晶组织的形态。The micro-sized second-phase and recrystallized structure has an important influence on the strength and toughness of 5083-O alloy.In order to acquire the morphological feature of the micro-sized second-phase particles and recrystallized particles in 5083-O alloy,multi-slices EDS data at a low acceleration voltage of 5 kV and EBSD data at 20 kV of the alloy are collected based on the double beam microscope system.These multi-slices data are restructured into three-dimensional types by Avizo software.The size,morphology,distribution,and volume fraction of the chief second-phases(Mg_(2)Si phase and Fe-rich phase)and recrystallized structure are obtained through the restructured data.The results show that the volume fractions of Mg_(2)Si phases,Fe-rich phases,and recrystallized particles in the studied alloy are 0.46%,0.25%,and 11.7%,respectively.Most Mg_(2)Si particles have smooth surfaces,with shapes of near-spherical,near-ellipsoid,or rod-shaped,and elongate along the rolling direction.The Fe-rich phases in the alloy are angular or subangular,and have relatively low spherical degrees.The threedimensional EBSD restructure data show that the smaller size recrystallized particles have the higher spherical degrees,and the bigger size recrystallized particles have the lower spherical degrees.It is found that the recrystallized grains grow up from the small sphere recrystallized particles during the annealing process,and grow fastest along the rolling direction.The morphology of recrystallized particles is more truly reflected by three-dimensional EBSD results.

关 键 词：5083铝合金 三维重构 第二相 再结晶 EBSD 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TB31[金属学及工艺—金属材料]