基本信息
项目批准号：51575450
申请代码：E0508
项目名称：超薄板的高转速微型搅拌摩擦焊接机理研究
项目负责人：傅莉
依托单位：西北工业大学
研究期限：2016-01-01 至 2019-12-31
资助经费：63.0（万元）

项目摘要
中文摘要：
基于电子电器行业及航空航天等领域超薄壁零部件的制造需求，开发高转速微型搅拌摩擦焊接(μFSW)工艺，系统研究同质和异质超薄板(0.5mm)的高转速μFSW焊接机理，形成超薄壁件焊接变形及质量稳定性控制所急需的关键技术与基础理论。相关成果可为高转速μFSW工艺与设备开发，及其在超薄壁结构制备中的工程应用提供基础理论指导与实践依据。主要研究内容包括：（1）揭示超薄板高转速μFSW焊接工艺条件对焊接组织、界面扩散及力学性能的影响规律与作用机理；（2）探讨超薄板高转速μFSW产热机制、焊缝金属的塑性流动与动态再结晶行为，揭示其主要的影响因素与作用机理；（3）开发能够预测超薄板高转速μFSW焊接温度场和塑性流动场的数值模拟技术，探讨焊接工艺条件对焊接温度场和塑性流动场的影响规律及控制方法；（4）揭示其焊接织构对接头力学性能与断裂行为的影响规律，优化不同接头型式超薄板的高转速μFSW工艺。
英文摘要：
Recently there are more and more requirements of ultra thin-walled components manufacture technology in the many fields such as aviation, aerospace, electrical and electronic industry. For meeting this requirement, the new kind of welding technology suitable for the ultra thin-walled components manufacture will be developed in this project. That is micro friction stir welding with high rotational speed(short for HRS-μFSW). The HRS-μFSW weldability and the related mechanisms for the similar and dissimilar materials in the form of ultra thin plates with the thinkness of 0.5mm be studied systematically. The results will solve the key fundamental theory and technology in the deformation and quality stability control in the manufacture of the ultra thin-walled components. The research will provides theoretical and practical foundation for the development of the HRS-μFSW technology and equipment, as well as propel the application of HRS-μFSW technology in many manufacture areas. . This research mainly concentrated on the following aspects: (1)Reveal the influence of HRS-μFSW welding technology on the microstructure, interface diffusion and mechanical property of the ultra-thin plates and the related mechanism.(2)Explore the influence factors on the heat generation mechanism as well as the plastic deformation, material flow and dynamic recrystallization behavior in weld zone during the HRS-μFSW process of the ultra-thin plates. (3)develop the numerical simulation methods used for the predict of temperature field and plastic flow filed during the HRS-μFSW process of the ultra-thin plates. Study the influence of welding technology on temperature field and plastic flow filed during the HRS-μFSW process of the ultra-thin plates as well as their control methods. (4) explore the influence of the texture evolution on the mechanical property and fracture behavior in the HRS-μFSW welded ultra-thin plates. Optimize HRS-μFSW technology for the ultra-thin plates with different joint geometry. 
                                                                                                                                                                                 
                                                                                                                                                                                                              ——来自https://kd.nsfc.gov.cn/