%0 Journal Article
%T 超声辅助铝合金填充式搅拌摩擦点焊的仿真和试验研究<br>Simulation and Experimental Research for Ultrasonic Assisted Filling Friction Stir Spot Welding of Aluminum Alloy
%A 刘新波
%A 乔凤斌
%A 周法权
%A 郭立杰
%J 机械科学与技术
%D 2016
%X 为了研究超声辅助对铝合金填充式搅拌摩擦点焊的影响，利用ABAQUS对超声辅助填充式搅拌摩擦点焊进行热力学仿真；利用自行研制的点焊装备分别对5A06、2A14、2219铝合金试片进行无超声、横向加超声以及轴向加超声三种不同的焊接试验，并对此三种超声加载方式下的焊点进行金相实验、抗拉试验和抗剪切试验。结果表明：辅助超声的引入可为点焊过程提供额外热输入；轴向加载超声可增强焊接区域材料的均匀性与一致性，一定程度上消除水平面弱连接，使得焊点抗剪性能提高，且不同材料的提高幅度不同；横向加载超声可使焊接区域的材料与周围材料产生流动交换，一定程度消除焊点竖直环面弱连接，使抗拉强度提升较大，并对不同材料的提高幅度不同。<br>In order to study the effects of the ultrasonic assistance on the joint property welded by filling friction stir spot welding, the thermal simulation about ultrasonic assisted filling type friction stir spot welding via ABAQUS is firstly presented; and then a spot welding equipment is developed, three aluminum alloys including 5A06, 2219 and 2A14 have been welded under no ultrasound, lateral ultrasonic and longitudinal ultrasonic assistance; and the welded spots have been undergone the metallographic, tensile and shear tests. The results show that the ultrasonic can provide extra heat input for filling friction stir spot welding process; the axial ultrasonic assisted welding can enhance the uniformity and consistency in the welded area, partly eliminate the weak link in the horizontal plane, and differently improve the shear performance according to the materials;the lateral ultrasound assisted welding can make the material flow and exchange with the surrounding material in the welded the area, eliminate vertical torus weak links to a certain extent, and differently improve the tensile strength according to the materials
%K 填充式搅拌摩擦点焊
%K 超声
%K 金相
%K 抗拉强度
%K 抗剪强度&lt
%K br&gt
%K filling friction stir welding
%K ultrasonic
%K metallography
%K tensile strength
%K shear strength
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6497.shtml