Abstract
We propose an x-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112} {111}-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of ω (hexagonal) → bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable ω precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {112} {111}-type twin formed under conditions free of external stress and internal strain. The ω-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 122-128 |
| Number of pages | 7 |
| Journal | Acta Materialia |
| Volume | 62 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 Jan |
| Externally published | Yes |
Keywords
- First-principles calculation
- Metals and alloys
- Microstructure
- Titanium alloy
- Twin
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys
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Cite this
Wu, S. Q., Ping, D. H., Yamabe-Mitarai, Y., Xiao, W. L., Yang, Y., Hu, Q. M., Li, G. P., & Yang, R. (2014). {112} {111} Twinning during ω to body-centered cubic transition. Acta Materialia, 62(1), 122-128. https://doi.org/10.1016/j.actamat.2013.09.040