Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-27T01:46:52.101Z Has data issue: false hasContentIssue false
  • English
  • Français

Atomic Structure of Internal Interfaces in A Ti3AI-TiAI Two-Phase Alloy

Published online by Cambridge University Press:  25 February 2011

J. M. Penisson ,
R. Bonnet ,
M. Loubradou  and
C. Derder
J. M. Penisson
Affiliation:
Ddpartement de Recherche Fondamentale sur la Matiére Condensde, CENG, 85X, 38041, Grenoble Cedex, France.
R. Bonnet
Affiliation:
INPG, LTPCM(URA no 29)/ENSEEG, Domaine Universitaire, BP 75, 38402, Saint Martin-d'Hores, France.
M. Loubradou
Affiliation:
INPG, LTPCM(URA no 29)/ENSEEG, Domaine Universitaire, BP 75, 38402, Saint Martin-d'Hores, France.
C. Derder
Affiliation:
INPG, LTPCM(URA no 29)/ENSEEG, Domaine Universitaire, BP 75, 38402, Saint Martin-d'Hores, France.
Get access

Abstract

TiAI/Ti3AI colonies in an as-cast Ti-40 at.%AI alloy have been studied using HREM. Their microstructures consist mainly of alternating parallel lamellae of y (TiAI, L10) and α2 (Ti3AI, DO19) phases. The γ phase is often twinned with extended boundaries {111] parallel to the adjacent Ti3AI-TiAI interphase boundaries. The detailed atomic structures of the two possible (111)-γ σ3a and (111)γ σ3b twin boundaries have been observed as well as the facetted (0001)α2//(11)γ interphase boundaries. The facetted boundaries contain transformation dislocations whose elastic displacement fields conform well to the fields computed from the Somigliana dislocation model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 41
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Lipsitt, H. A., High Temperature Ordered Intermetallic alloys, Koch, C. C., Liu, C. T., and Stoloff, N. S., eds. (MRS, Pittsburgh, PA, 1985), p. 351.Google Scholar
[2] Yang, J. M. and Jeng, S. M., Scripta. Met., 231, 1559, (1989).Google Scholar
[3] Zhao, L. and Tangri, K., Phil. Mag. A, 64, 361, (1991) ;Acta metall.mater., 39, 2209 (1991).Google Scholar
[4] Liu, Z. G., Frommeyer, G. and Kreuss, M., Scripta. Met., 25, 1205, (1991).Google Scholar
[5] Mahon, G. J. and Howe, J. M., Met. Trans. A, 21, 1655, (1990).Google Scholar
[6] Delage, D., Driole, J. et Ernst, R., 25e Colloque de Métallurgie de Saclay, I.N.S.T.N., Saclay (France), 23 - 25 juin 1982.Google Scholar
[7] Stadelmann, P. A., Ultramicroscopy, 21, 131, (1987).CrossRefGoogle Scholar
[8] Feng, C. R., Michel, D. J. and Crowe, C. R., Scripta Metall., 23, 1707, (1989).Google Scholar
[9] Ṕnisson, J. M. and Regheere, G., Mat. Sci. and Eng. A, 107, 199, (1989).Google Scholar
[10] Bonnet, R., Loubradou, M., Catana, A., and Stadelmann, P., Met. Trans. 22A, 1145 (1991).Google Scholar
[11] Bonnet, R., Derder, C., Loubradou, M., Catana, A. and Stadelmann, P. A., Phil. Mag. Lett., 63, 205, (1991).CrossRefGoogle Scholar
[12] Lasalmonie, A. and Strudel, J. L., Phil. Mag., 32, 937, (1975).Google Scholar
[13] Regheere, G. and Pénisson, J. M., Coll. de Phys. C1, 909, (1990).Google Scholar
[14] Tietz, L. A., Summerfelt, S. R. and Carter, C. B. M. R. S. proc. 159, 209, (1990).Google Scholar
[15] Portier, R. and Gratias, D., J. de Phys., C4, 17, (1982).Google Scholar
[16] Hug, G., Thése és-Sciences, Université de Paris Sud, April 1988, p. A–147.Google Scholar
[17] Bonnet, R. and Loubradou, M., this conference.Google Scholar
[18] Loiseau, A., Note Technique 1985–6, ONERA, 92320, Chatillon, Nov. 1985.Google Scholar