搅拌摩擦焊塑性金属流动基本模型
Fundamental model of plastic material flow in FSW
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摘要: 通过对搅拌摩擦焊接过程进行抽象和假设，建立了搅拌摩擦焊接过程中塑性金属流动的基本模型.文中定义了步长塑性层、步长空腔以及剥离侧和堆积侧等概念.提出了步长塑性层是塑性金属转移流动的基本单元，步长塑性层连续转移流入并填满步长空腔，塑性金属流动的一个周期结束同时下一个周期开始.分析了步长塑性层流动的驱动力以及阻力等因素.结果表明，若步长塑性层不能全部填满步长空腔，焊缝中会出现体积型缺陷的结论.步长塑性层在流入步长空腔的过程中，同时会掉头转向.Abstract: Based on the abstract and assumption of friction stir welding (FSW), the fundamental model of plastic material flow in FSW process was built. A series of new conceptsare defined, such as step plastic deformationlayer, step cavity, stripping side and stacking side. The step plastic deformation layer is supposed as the basic unit of plastic deformation material flow,step plastic deformation layer continuously transfers into and fills the step cavity, a cycle of plastic deformation material flow stops and the next cycle starts. Driving force and resistance force related to step plastic deformation layer were analyzed, which points out that volume defects appear if the step plastic deformation layer cannot fill all step cavity. During the step plastic deformation layer transferring into the step cavity,the phenomenon of turning round to change direction will occur.
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[1] Morisada Y, Imaizumi T. Determination of strain rate in friction stir welding by three-dimensional visualization of material flow using X-ray radiography[J]. Scripta Materialia, 2015, 106:57-60. [2] Lohwasser Daniela, Chen Zhan. Friction stir welding from basics to applications[M]. England:Woodhead Publishing, 2010. [3] 王卫兵, 佟建华. FSW待焊界面消失模型[J]. 焊接学报, 2013, 34(6):37-40. Wang Weibing, Tong Jianhua. The model for the disappearance of FSW pre-welding interface[J]. Transactions of the China Welding Institution, 2013, 34(6):37-40. [4] 王卫兵, 张坤. 搅拌摩擦焊S线特征模型[J]. 航空制造技术, 2015(9):7-10. Wang Weibing, Zhang Kun. The model for characteristics of S-line in FSW joint[J]. Aeronautical Manufacturing Technology, 2015(9):7-10. [5] 郭晓娟, 李光. 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. Guo Xiaojun, Li Guang. Joint interface forming and influential factor of friction stir overlap welding[J]. Aeronautical Manufacturing Technology, 2009(12):62-65. [6] 邢丽, 严超英. FSW搭接接头界面迁移行为研究[J]. 材料科学与工艺, 2014, 22(3):80-85. Xing Li, Yan Chaoying. Study on interface migration behavior in FSW lap joint[J]. Materials Science and Technology, 2014, 22(3):80-85.
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