Influence of Aluminum Content in g-TiAl with L10 Structure during Ordering Processes

稀有金属（英文版）, 2001, 20(4): 230-235.

^1, , ^2, , ^3, , ^4,

1.University of Science and Technology Beijing,

2.University of Science and Technology Beijing,

3.University of Science and Technology Beijing,

4.Department of Mechanical and Aerospace Engineering, West-Virginia University, P. O.

基金项目: 国家自然科学基金(59895151-01)

Influence of Aluminum Content in g-TiAl with L10 Structure during Ordering Processes

Based on EAM (embedded atom method) interatomic potential, the effect of aluminum content on the type of order-disorder transformation (ODT) and the structure properties (lattice constants, volume, c/a ratio and configuration energy) during ordering processes was investigated for g-TiAl based alloys. Results show that for the alloys with lower than 50%Al (all composition is in atom number fraction), the ODT is the first order transition, and the second order transition for the alloys with equal or higher than 50% Al. The increase of aluminum content results in the critical temperature increasing. The aluminum content has a very little effect on the lattice constants, the volume and the c/a ratio, but has a significant effect on the configuration energy. A metastable disordered state was found for the alloys with less than 50%Al.

参考文献

[1]	P. Hohenberg;W. Kohn .[J].Physical Review B,1964,136:864.
[2]	W Kohn;L J Sham .[J].Physical Review A,1965,140:1133.
[3]	M Morinaga;J Saito;N Yukawa .[J].Acta Materialia,1990,38:25.
[4]	M Morinaga;N Yukawa .[J].Journal of Physics F:Metal Physics,1985,F15:1071.
[5]	R Passianot;D Farkas;E J Savinot .[J].Physical Review B,1991,43:6952.
[6]	P Villars;L. Calvert.Pearson's Handbook of Crystallographic Data for Intermetallic Phases[M].Metals Park, OH,1991
[7]	N V Ageyev.Chemistry of Metal Alloys[J].Mos-cow-Lennigrad,Izv-vo An SSSR,1941
[8]	C Sykes;F W Jones .[J].Proceedings of the Royal Society of London,1938,A166:376.
[9]	C Sykes;H Evans .[J].Journal of the Institute of Metals,1936,58:255.
[10]	Z W Wilchinsky .[J].Journal of Applied Physics,1944,15:806.
[11]	A P Komar;N N Buynov .[J].Zh Eksperim I Teor Fiz,1947,17:555.
[12]	J M Cowley .[J].Journal of Applied Physics,1950,21:24.
[13]	G Sattonnay;O Dimitrov .[J].Acta Materialia,1999,47(07):2077.
[14]	D Farkas .Modeling Simul[J].Materials Science and Engineering,1994,2:975.
[15]	N V Ageyev;D N Shoykhet .[J].Annals of Physics,1930,23:90.
[16]	R W Cahn.[J].Intermetallics,1999:1089.

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Influence of Aluminum Content in g-TiAl with L10 Structure during Ordering Processes

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