Abstract
Material flow is a key phenomenon to obtain sound joints by friction stir welding (FSW), and it is highly dependent of the welded material. It is well known that the optimal FSW condition depends on the welded material. However, the material flow during FSW has not been totally clarified in spite of many researches. Especially, the material flow of steel during FSW is still unclear. It seems difficult to understand the material flow by the traditional method such as the tracer method or observation of the microstructure in the stir zone. Therefore, in this study, the material flow of steel was three dimensionally visualized by x-ray radiography using two pairs of x-ray transmission real-time imaging systems, and was then compared with the material flow of aluminum. The result revealed the effect of the welded material on the material flow during FSW.
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The authors wish to acknowledge the financial support of a Collaborative Research Based on Industrial Demand “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials” by Japan Science and Technology Agency (JST), the Global COE Programs and Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, and ISIJ Research Promotion Grant.
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Morisada, Y., Imaizumi, T., Fujii, H. et al. Three-Dimensional Visualization of Material Flow During Friction Stir Welding of Steel and Aluminum. J. of Materi Eng and Perform 23, 4143–4147 (2014). https://doi.org/10.1007/s11665-014-1202-6
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DOI: https://doi.org/10.1007/s11665-014-1202-6