CAJ | 학술논문

利用小型搅拌摩擦焊机焊接5083铝合金板材，借助电子背散射衍射技术和取向成像分析软件对焊缝焊核区的焊核前进侧、焊核中心区和焊核后退侧的晶粒形貌和取向差角度进行了对比性研究．结果表明：经过搅拌摩擦焊接后，焊核区发生动态再结晶，晶粒由原始带状转变为等轴状，其大角度晶界含量相比于母材有明显增加，但不同部位的晶粒尺寸和大角度晶界比例均不同，焊核前进侧、焊核中心区和焊核后退侧的平均晶粒尺寸分别为17.0、15.8和13.5μm，大角度晶界比例分别为76.4％、68.8％和73.2％．
이용소형교반마찰한궤한접5083려합금판재，차조전자배산사연사기술화취향성상분석연건대한봉한핵구적한핵전진측、한핵중심구화한핵후퇴측적정립형모화취향차각도진행료대비성연구．결과표명：경과교반마찰한접후，한핵구발생동태재결정，정립유원시대상전변위등축상，기대각도정계함량상비우모재유명현증가，단불동부위적정립척촌화대각도정계비례균불동，한핵전진측、한핵중심구화한핵후퇴측적평균정립척촌분별위17.0、15.8화13.5μm，대각도정계비례분별위76.4％、68.8％화73.2％．
The 5083-H321 aluminum magnesium alloy plates were welded on a minitype friction stir weld-ing machine.The microstructure of friction stir welding (FSW) in each nugget zone was studied via the grain morphology and misorientation distribution of nugget advancing side , nugget median zone and nug-get retreating side .The results show that there are small equiaxial grains into which lath-shaped grains turn in nugget zones after friction stir welding .However , there are differences in the grain size between the nugget advancing side , nugget median zone and nugget retreating side , and the average grain sides are 17, 15.8 and 13.5 μm, respectively.Compared with the base metal , the high angle grain bounda-ries(HAGB) fraction in nugget zones increase .Meanwhile the content is also different in the three zones , and they are 76.4%, 68.8%and 73.2%, respectively .