Dislocations and charge density distributions of {gamma} phase in Ti47.5Al2.5V deformed at room temperature and 400 {degree}C
- Central Iron and Steel Research Inst., Beijing (China)
The observations on quantity and configuration of dislocations by TEM conventional diffraction contrast method as well as the determinations of the electron charge density distributions by the quantitative electron crystallography method in Ti47.5Al2.5V deformed at 400 C and room temperature (R.T.) have been carried out. The metallic bonding between Al-Al or Ti-Ti atom pair along {l_angle}110] and Ti-Ti along {l_angle}112] direction is strengthened; while the metallic bonding between Ti-Al atom pair both along {l_angle}101] and {l_angle}121] direction is weakened at 400 C. The quantities of a/2{l_angle}110], a/2{l_angle}112] and dissociated a{l_angle}101] (a[101]{yields}a/2[1{bar 1}0] + a/3[112] + SISF + a/6[112]) dislocations are increased at 400 C, compared with that at R. T.. The a/2 {l_angle}121] super dislocations have not been seen both at 400 C and R.T.
- OSTI ID:
- 78387
- Report Number(s):
- CONF-941144-; ISBN 1-55899-265-0; TRN: IM9531%%440
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of High-temperature ordered intermetallic alloys VI: Part 1. Materials Research Society symposium proceedings Volume 364; Horton, J. [ed.] [Oak Ridge National Lab., Oak Ridge, TN (United States)]; Baker, I. [ed.] [Dartmouth College, Hanover, NH (United States)]; Hanada, Shuji [ed.] [Tohoku Univ., Sendai (Japan)]; Noebe, R.D. [ed.] [NASA Lewis Research Center, Cleveland, OH (United States)]; Schwartz, D.S. [ed.] [McDonnell Douglas Aerospace, St. Louis, MO (United States)]; PB: 713 p.
- Country of Publication:
- United States
- Language:
- English
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