搅拌摩擦焊接件内部残余应力无损测试研究进展

搅拌摩擦焊是近年来发展的一种新型焊接技术,目前国内主要着力于搅拌摩擦焊工艺及应用方面的研究,但由于测试方法和相关设备的限制,关于搅拌摩擦焊接件内部残余应力的研究几乎是空白,而国外利用其先进的中子衍射和高能同步辐射装置已经开展了较多搅拌摩擦焊接件内部残余应力的无损测试。综述了近10余年来国外搅拌摩擦焊接件内部残余应力测试的研究进展,讨论了影响残余应力测试结果的各种因素;最后介绍了国内用短波长X射线衍射仪测试材料内部残余应力的探索,对未来准确、高效、经济而无损地测试搅拌摩擦焊接件内部残余应力的研究方向进行了展望。

Researching Progress in Non-destructive Testing Interior Residual Stress of Friction Stir Welding Parts

Friction stir welding(FSW) is a new type of welding technology developing in recent years.Now researches in our domestic mainly focus on the manufacturing processes and application of friction stir welding.However,because of the lack of measurement methods and correlative equipments,research about the interior residual stress of FSW parts is almost empty,but the abroad already use their advanced neutron diffraction and synchrotron radiation equipments to test the interior residual stress of FSW parts non-destructively.So recent advances about the measurement of the interior residual stress of FSW parts within this 10 years were reviewed.In addition,the different factors that affect the measurement results were discussed.Finally,a new exploring method using short-wavelength X-ray diffraction to measure the residual stress within the materials in our country was introduced,and a prospect was made on the research direction to have accurate,efficient and economical non-destructive residual stress testing methods of the FSW parts.