|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||Scaling-up of High-pressure Sliding: Production of High Strength and Superplasticity of Metallic Materials
||Yoichi Takizawa, Kazushige Fujimitsu, Takahiro Masuda, Takahiro Kajita, Kyohei Watanabe, Manabu Yumoto, Yoshiharu Otagiri, Zenji Horita
|On-Site Speaker (Planned)
The process of High-Pressure Sliding (HPS) is an SPD method developed recently for grain refinement of metallic materials under high pressure. The sample for HPS is used with a form of sheet or rod. In this study, scaling-up of the sample is attempted with this HPS process for practical production of superplastic materials. An HPS facility with capacities of 500 ton for vertical pressing and of 500 and 300 ton for horizontal forward and backward pressings, respectively, was newly built and applied for grain refinement of high strength Al alloys. Sheet samples with dimensions of 15 x 100 x 1 mm3 were processed at room temperature and ultrafine grains with sizes of 200-300 nm were successfully produced in the alloys. Tensile testing at elevated temperatures confirmed the advent of superplasticity with total elongations of more than 400% in A2024 and A7075 alloys.