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{112}〈111〉 Twinning during ω to body-centered cubic transition
- Source :
- Acta Materialia. 62:122-128
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- We propose an ω-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({1 1 2}〈1 1 1〉-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 {1 1 2}〈1 1 1〉-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.
- Subjects :
- Materials science
Polymers and Plastics
Condensed matter physics
Metals and Alloys
Titanium alloy
Reverse transformation
Cubic crystal system
Microstructure
Instability
Electronic, Optical and Magnetic Materials
Crystallography
Lattice (order)
Metastability
Ceramics and Composites
Crystal twinning
Subjects
Details
- ISSN :
- 13596454
- Volume :
- 62
- Database :
- OpenAIRE
- Journal :
- Acta Materialia
- Accession number :
- edsair.doi...........17830b0e163325ad72f7e7cb03466738