| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Study of the Influence of the Mixed-grain Structure on the Microscopic Deformation Behavior of 316LN Steel |
| Author(s) |
YangQi Li, Haiming Zhang, Mingxiang Liu, Zhenshan Cui |
| On-Site Speaker (Planned) |
YangQi Li |
| Abstract Scope |
Mixed-grains are common microstructures for heavy forgings. Taking 316LN austenitic stainless steel as an investigated material, two kinds of grain structures were tested for observation of microscopic deformation heterogeneity: uniform fine grains and mixed structures with millimeter-grade coarse grains (MCGs). Tensile tests and EBSD as well as OM observations were performed. Results showed that the deformation of the MCGs exhibited single slip if they were with soft orientation, and cross slip if they were with hard orientation. Obvious slip bands were observed in the MCGs. The fine grains were seen easily rotated in the deformation, forming distinguished bumpy grain boundaries, while the MCGs displayed smooth grain morphologies. The interior MCGs undertook severer deformation than the fine grains, which showed the strain partitioning ability of MCGs were limited. This deformation behavior is capable to lead the crack initiation in the interface of MCGs and fine grains. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |