Abstract
We have studied the effects of straining prior to annealing for lamellar structure formation in a Ti-39at%Al single crystal intending to accelerate the lamellar structure formation and decrease the resultant lamellar spacing via preferential nucleation of γ-TiAl phase at dislocations in α2-Ti 3A phase. In a crystal cold-rolled to 10% reduction before annealing, a fine lamellar structure with 88 nm average spacing was formed by annealing at 1073 K for 1 x 10 4 whereas no lamella were observed in the crystal subjected to the same annealing after 5%-cold-rolling. In addition, it was also demonstrated that when the crystal is locally strained by indentation and annealed at 1073 K for 1 xlO 4 s, a lamellar structure with 43 nm average lamellar spacing is formed in areas near the indentation and there were no lamella beyond these areas.
Original language | English |
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Pages (from-to) | 131-136 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 1059 |
Publication status | Published - 2008 |
Event | Nanoscale Pattern Formation - Boston, MA, United States Duration: 2007 Nov 26 → 2007 Nov 30 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering