铝/钢等离子弧熔-钎焊接头界面电子背散射衍射分析  

Electron backscattered diffraction analysis on interface of aluminum/steel joints produced by plasma arc welding-brazing

作　　者：吴迪 耿文华 李洪梅[1] 孙大千[1] WU Di;GENG Wen-hua;LI Hong-mei;SUN Da-qian(College of Materials Science and Engineering,Jilin University,Changchun 130022,China;College of Engineering,Changchun Normal University,Changchun 130031,China;Tianjin Branch FAW-VW Automation Limited Company,Tianjin 301599,China)

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]长春师范大学工程学院,长春130031 [3]一汽-大众汽车有限公司天津分公司,天津301599

出　　处：《吉林大学学报（工学版）》2023年第5期1331-1337,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51805205);吉林省科技发展计划项目(YDZJ202201ZYTS548);长春师范大学自然科学基金项目([2018]005)。

摘　　要：采用电子背散射衍射(EBSD)技术对铝合金/超高强钢等离子弧熔-钎焊接头界面的组织构成、晶粒取向和取向差分布、晶粒尺寸、织构情况进行了研究。结果表明:铝合金/超高强钢等离子弧熔-钎焊接头界面组织呈明显的双层结构,由Fe_(4)Al_(13)相和Fe_(2)Al_(5)相组成,两相在晶粒尺寸和形态上存在明显差异。Fe_(4)Al_(13)相呈细小的等轴晶形态,以大角度晶界为主,Fe_(2)Al_(5)相呈柱状晶形态,以小角度晶界为主。Fe_(4)Al_(13)相的晶粒尺寸明显小于Fe_(2)Al_(5)相晶粒尺寸。Fe_(4)Al_(13)相的主要织构为<010>丝织构,Fe_(2)Al_(5)相晶粒具有明显的择优取向,其主要织构为<001>丝织构。The technique electron backscatter diffraction was used to investigate the microstructure,grain orientation,grain size and texture of the interface intermetallic compound of aluminum alloy/ultrahighstrength steel plasma arc welding-brazing joint.The results indicated that the interface zone exhibited an obvious double-layer structure with different sizes and morphologies,which is composed of Fe_(4)Al_(13) phase and Fe_(2)Al_(5) phase.The Fe_(4)Al_(13) phase has fine equiaxed grains morphology and is dominated by high-angle one,while the Fe_(2)Al_(5) phase has columnar grains morphology and is dominated by low-angle grain boundary.The grain size of Fe_(4)Al_(13) is obviously smaller than that of Fe_(2)Al_(5).The main texture of Fe_(4)Al_(13)phase is010silk texture,while the main texture of Fe_(2)Al_(5) phase is001silk texture with obvious preferred orientation.

关 键 词：金属材料 铝合金/超高强钢 等离子弧熔-钎焊 界面组织 织构 电子背散射衍射 

分 类 号：TG456.2[金属学及工艺—焊接]