A novel superplastic dieless drawing process of ceramic tubes

A novel superplastic dieless drawing was performed for fabrication of ceramic tubes. The reduction in area of tube obtained through the drawing was controlled by changing feeding and drawing speeds. Some tested tubes showed extremely low drawing stress of 15 MPa and high value of strain rate sensitivity parameter of 0.42. Furthermore, the maximum reduction in area of 84% was accomplished through single pass drawing. Thus, the ceramic tubes showed a good superplasticity in the proposed process. The conclusion is that the proposed superplastic dieless drawing can be widely used for efficient fabrication of various ceramic tubes.