Abstract
Substructure development through aging and annealing treatments was studied for rapidly solidified TiCo ribbons using TEM. In as-spun ribbons, equiaxed grain structure was developed and its crystal structure was B2-ordered immediately after melt-spinning, while a small amount of fine precipitates existed as second phase. Some grains were dislocation-free but others contained a certain amount of curved or helical dislocations and loops. The dislocation density in the ribbons annealed at 700°C for 24 h was obviously higher than those in the as-spun ribbons and the ribbons aged at 200°C for 100 h. The increase of the dislocation density in the annealed ribbons would result from the absorption of excess vacancies. Therefore, the obtained results indicated that a large amount of supersaturated thermal vacancies were retained in TiCo as-spun ribbons by the rapid solidification.
Original language | English |
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Pages (from-to) | 849-852 |
Number of pages | 4 |
Journal | Materials Science Forum |
Volume | 475-479 |
Issue number | I |
DOIs | |
Publication status | Published - 2005 |
Event | PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China Duration: 2004 Nov 2 → 2004 Nov 5 |
Keywords
- Dislocation
- Intermetallic compound
- Rapid solidification
- TiCo
- Vacancy
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering