|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Elastoplastic Deformation of Micro-constituents in a Duplex Stainless Steel by Cyclic Nanoindentation
||Yunfei Jia, Yuanyuan Cui, Fu-Zhen Xuan
|On-Site Speaker (Planned)
Cyclic elastoplastic deformation behaviors of austenite phase and ferrite phase at the microscale in a duplex stainless steel are investigated by cyclic nanoindentation and TEM. The maximum penetration depth per cycle of the indenter onto both austenite phase and ferrite phase, which is related to the coverage of the deformation zone under the indenter, increases significantly at the first few cycles and then increases gradually to a constant. TEM observation manifests that, after the quasi-static single load, the dislocation nucleation and concentration occur in both austenite phase and ferrite phase underneath the indenter. With the cycle number increases, the dislocations propagate to the further region in both phase but leave dislocation starvation underneath the indenter in austenite phase and few dislocations at the same region in ferrite phase. Besides, the nucleation and propagation of strain-induced nano-crystalline are observed in austenite phase and the slip bands nucleated in ferrite phase.
||Planned: Supplemental Proceedings volume