| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7952119 | Journal of Materials Science & Technology | 2018 | 5 Pages |
Abstract
Oxide dispersion strengthened (ODS) steels can be used as the structural materials in the future fusion reactors and the fuel cladding materials in the advanced fission reactors. However, the weldability of ODS steels is a severe problem. In the present study, defect-free joints of the 15Cr-ODS ferritic steel were achieved by friction stir welding at different rotation speeds. The recrystallization, hardness and tensile properties are highly related with the rotation speed of the stir tool. The higher rotation speed results in coarser grains in the top SZ, while the grain size exhibits more complicated relation with the rotation speed in the SZ center. The joint welded at 250Â rpm exhibits a maximum tensile strength of 974Â MPa that reaches about 84% of that of the base metal.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Chemistry
Authors
Wentuo Han, Pingping Liu, Xiaoou Yi, Qian Zhan, Farong Wan, Kiyohiro Yabuuchi, Hisashi Serizawa, Akihiko Kimura,