采用搅拌摩擦焊方法对5083铝合金进行搭接实验.用万能试验机对接头进行拉剪试验,对其断口利用SEM电镜进行观察和分析,并使用光学显微镜对其接头横截面进行组织观察.结果表明:即使搅拌针长度短于上层铝板的厚度,上、下层铝板在搅拌针作用的区域,晶粒都发生了一定细化,其尺寸都小于母材.而且焊缝横截面的显微硬度分布也显示出两板在搅拌针作用区域的硬度均与母材相当.在拉剪试验时,界面结合处没有出现断裂现象,断裂位置均在上层铝板前进侧的热影响区.接头强度系数最高可达80％,接头的断裂形式为韧性断裂.
参考文献
| [1] | 周万盛;姚君山.铝及铝合金的焊接[M].北京:机械工业出版社,2006 |
| [2] | H. J. Liu;H. Fuju;M. Maeda;K. Nogi .Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy[J].Journal of Materials Processing Technology,2003(3):692-696. |
| [3] | MAHONEY M W;RHONDE C G;FLINTOFF J G et al.Properties of friction stir welded 7075-T351 aluminum alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1998,29(07):1955-1964. |
| [4] | 张昭,陈金涛,张洪武.搅拌头尺寸变化对搅拌摩擦焊接的影响[J].材料工程,2006(01):19-23,31. |
| [5] | 郭晓娟,李光,李丛卿,栾国红.搅拌摩擦搭接焊界面成形机制及影响因素[J].航空制造技术,2009(12):62-65. |
| [6] | 周颜丽,刘涛,张彦华.铝合金搭接搅拌摩擦焊接头拉伸变形的数值模拟[J].焊接学报,2009(02):57-60. |
| [7] | L. CEDERQVIST;A. P. REYNOLDS .Factors Affecting the Properties of Friction Stir Welded Aluminum Lap Joints[J].Welding Journal,2001(12):281-s-287-s-0. |
| [8] | D. Fersini;A. Pirondi .Fatigue behaviour of A12024-T3 friction stir welded lap joints[J].Engineering Fracture Mechanics,2007(4):468-480. |
| [9] | 钟群鹏;赵子华.断口学[M].北京:高等教育出版社,2006 |
| [10] | Seung Hwan C. Park;Yutaka S. Sato;Hiroyuki Kokawa .Effect of micro-texture on fracture location in friction stir weld of Mg alloy AZ61 during tensile test[J].Scripta materialia,2003(2):161-166. |
| [11] | Sutton MA.;Yang B.;Reynolds AP.;Taylor R. .Microstructural studies of friction stir welds in 2024-T3 aluminum[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):160-166. |
| [12] | CAVALIERE P;NOBILE R;PANELLA F W et al.Mechanical and micro structural behavior of 2024-7075 aluminum alloy sheets joined by friction stir welding[J].International Journal of Machine Tools and Manufacture,2006,46(06):588-594. |
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