کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1585684 | 1514921 | 2006 | 7 صفحه PDF | دانلود رایگان |
The combination of friction stir welding (FSW) and a thermomechanical process for ultrafine grained steel (martensite process) was studied in order to obtain a preferable balance between the strength of the base metal and that in the stir zone while maintaining a high strength in both areas. Plain low-carbon steels with three kinds of microstructures, (lath-martensite, ultrafine lamellar dislocation cell structure and multiphased ultrafine grained structure) were prepared by the martensite process and examined for FS welding. The microstructure and hardness around/in the stir zone were significantly affected by the microstructure of the base metal. After the FSW, the cold-rolled steel had the highest strength in the stir zone with the smallest ferrite grain size of the three. Subsequent annealing of the cold-rolled and FS welded steel realized higher strength in both the base metal and the stir zone than that of the conventional plain low-carbon steel.
Journal: Materials Science and Engineering: A - Volume 423, Issues 1–2, 15 May 2006, Pages 324–330