Abstract
The tension-compression type of load reversal produces an asymmetric cyclic tension-compression behavior and varied yielding stresses in the subsequent monotonic tension and compression in a twinning induced plasticity steel. The micromechanical behavior was elucidated via the evolutions of the stacking fault probability and the grain orientation density captured by in-situ neutron diffraction. The latter indicates more profound detwinning activities in a reversal from tension to compression than those from compression to tension and more twinning involves in monotonic tension than in compression. This is confirmed by the calculated twinning activities in monotonic tension and compression using the visco-plastic self-consistent model.
| Original language | English |
|---|---|
| Pages (from-to) | 168-172 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 150 |
| DOIs | |
| State | Published - Jun 2018 |
Funding
QX thanks the funding from the Natural Science Foundation of China (grant no. 51571025 ) during his former post-doc period at the University of Science and Technology Beijing. QX thanks the support of Laboratory Directed Research and Development (LDRD) Program of Oak Ridge National Laboratory. This research used resources at the Spallation Neutron Source, a U.S. DOE Office of Science User Facility operated by ORNL.
| Funders | Funder number |
|---|---|
| Oak Ridge National Laboratory | |
| Laboratory Directed Research and Development | |
| National Natural Science Foundation of China | 51571025 |
| University of Science and Technology Beijing |
Keywords
- Detwinning
- Grain orientation dependence
- Stacking fault probability
- TWIP
- Tension-compression asymmetry