Abstract
Evolution of the peak intensity for different grain orientations was in-situ measured by neutron diffraction for a twinning induced plasticity steel during tension-compression fatigue tests. Amplitude of the intensity variation is larger in high cycles than that at early cycles. The hysteresis loop features an asymmetric shape at early cycles and becomes symmetric with increase of cycles. Different twinning/detwinning activities correspond to different shape of the hysteresis loop. In cycle one, limited fresh twin volume is expected to correspond to short period of detwinning/retwinning. At later cycles, the twinning and detwinning are expected to happen together throughout the whole cycle.
| Original language | English |
|---|---|
| Pages (from-to) | 83-87 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 137 |
| DOIs | |
| State | Published - Aug 1 2017 |
Funding
Q. XIE 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. Q. XIE also thanks the support of a Laboratory Directed Research and Development project at the Oak Ridge National Laboratory. Neutron work was done at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.
Keywords
- Detwinning
- Fatigue
- Neutron diffraction
- Retwinning
- Twinning