|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||J-90: High-speed Deformation Behavior of a Heterogeneous-nano Structured Austenitic Stainless Steel
||Chihiro Watanabe, Ayumu Terada, Norimitsu Koga, Tomotsugu Shimokawa, Masakazu Kobayashi, Hiromi Miura
|On-Site Speaker (Planned)
High-speed deformation behavior of SUS316LN stainless steel with the heterogeneous-nano (HN) structure, composed of deformation twin domains, ultrafine lamellae and shear bands, was systematically investigated by means of Charpy impact tests at some temperatures and dynamic tensile tests at room temperature (RT). The HN structured SUS316LN exhibited an excellent balance of strength and Charpy impact value at RT. At a lower impact speed v, the impact value increased with lowering test temperature from RT to 173 K. Nevertheless at a higher v, the impact value was lower than that at the lower v and became approximately identical irrespective of temperature. During the impact tests, deformation-induced γ → α’ martensitic transformation was taken place. The volume fraction of the α’ phase denoted the same tendency of the impact value. These results strongly suggest that the deformation-induced martensitic transformation plays an important role in the impact value.
||Iron and Steel, Mechanical Properties, Characterization