|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Incremental Feeding for Upsizing Severely Deformed Areas under High Pressure
||Kosei Sumikawa, Yoichi Takizawa, Manabu Yumoto, Yoshiharu Otagiri, Zenji Horita
|On-Site Speaker (Planned)
The high-pressure sliding (HPS) is a process of severe plastic deformation (SPD) under high pressure for significant grain refinement. It is similar to the process of high-pressure torsion (HPT) so that both HPS and HPT processes are applicable to hard and less ductile materials. The difference is that the HPS process is used with rectangular sheets while the HPT process is with circular disks. Our recent study showed that the increase in the machine capacity allows sufficient sample sizes for evaluation of properties but it is still small for practical application. In this study, we introduce an incremental feeding process in the HPS process for upsizing SPD areas without increasing the machine capacity. This application is demonstrated with a typical Ni-based superalloy (Inconel718) so that the alloy exhibits superplastic deformation through ultrafine grain refinement.
||Planned: Supplemental Proceedings volume