CAJ | 학술논문

将薄铜片作为标示材料镶嵌于2024铝合金板中,经搅拌摩擦焊接焊后,用金相法观察其最终位置.参考材料流动的可视化实验结果,建立搅拌摩擦焊传热与材料流动的三维数值分析模型.搅拌针附近塑性材料流动速度分布模式的计算结果与可视化实验结果基本一致.当焊接速度一定时,随搅拌针旋转速度的提高,搅拌针附近塑性材料流动加剧.焊核区形状与尺寸的计算结果与实测数据吻合.
장박동편작위표시재료양감우2024려합금판중,경교반마찰한접한후,용금상법관찰기최종위치.삼고재료류동적가시화실험결과,건립교반마찰한전열여재료류동적삼유수치분석모형.교반침부근소성재료류동속도분포모식적계산결과여가시화실험결과기본일치.당한접속도일정시,수교반침선전속도적제고,교반침부근소성재료류동가극.한핵구형상여척촌적계산결과여실측수거문합.
Thin copper sheets as marker material were embedded into weld path of 2024 aluminium alloy plates and their final position after friction stir welding was examined by metallographic techniques.Referring to the visualized material flow patterns,a three-dimensional model was developed to conduct the numerical simulation of the temperature profile and plastic material flow in friction stir welding.The calculated velocity contour of plastic flow in close proximity of the tool is generally consistent with the visualized results.As the tool rotation speed increases at a constant tool travel speed,the material flow near the pin gets stronger.The predicted shape and size of the weld nugget zone match with the experimentally measured ones.