Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-28T23:50:38.448Z Has data issue: false hasContentIssue false
  • English
  • Français

Genesis of Defects in Massively Transformed L10-ordered τ-MnAl Alloys

Published online by Cambridge University Press:  21 March 2011

Cagatay Yanar ,
Velimir Radmilovic ,
William. A. Soffa  and
Jorg M. K. Wiezorek
Cagatay Yanar
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
Velimir Radmilovic
Affiliation:
National Center for Electron Microscopy, LBNL, Berkeley, CA, and Department of Physical Metallurgy, University of Belgrade, 11001 Belgrade, Yugoslavia
William. A. Soffa
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
Jorg M. K. Wiezorek
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
Get access

Abstract

Defects produced in massively transformed L10-ordered τ-MnAl have been characterized by detailed TEM studies. The defect population in massive τ-MnAl comprises arrays of overlapping stacking faults, {111}-conjugated microtwins, thermal antiphase boundaries and dislocations. The genesis of these defects has been attributed to atomic attachment faulting on {111}- and {020}-type facets of the essentially incoherent growth interface between the parent and product phases. The features of the defect genesis in τ-MnAl are discussed with respect to the role of atomic level processes at solid-state transformation interfaces in general and growth interfaces in massively transforming materials systems in particular.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 652: Symposium Y – Influences of Interface & Dislocation Behavior on Microstructure Evolution , 2000 , Y8.3
Copyright
Copyright © Materials Research Society 2001

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. Muller, C., et al. , Z. Metallkd, 87, 594 (1996)Google Scholar
2. Hoydick, D.P., Palmiere, E.J., and Soffa, W.A., Scripta Mater, 36,151 (1997)Google Scholar
3. Vlasova, N.I., et al. , Phys. Met. Metall, 51,1 (1981)Google Scholar
4. Yanar, C., et al. , Microscopy and Microanalysis, 6, 364 (2000)Google Scholar
5. Yanar, C., Wiezorek, J.M.K., and Soffa, W.A., Phase Transformations and Evolution in Materials, 39–54, edited by Turchi, P. and Gonis, A., Warrendale, PA, TMS (2000)Google Scholar
6. Kumar, M., et al. , Mat. Res. Soc. Symp., p. KK8.19.1(1999)Google Scholar
7. Yamaguchi, M. and Umakoshi, Y., Prog. in Mat. Sci., 31, 1 (1990)Google Scholar
8. Wang, P., Viswanathan, G.B., and Vasudevan, V.K., Metall. Trans., 23A, 690 (1992)Google Scholar
9. Wang, P., et al. , Acta Mater, 46, 13 (1998)Google Scholar
10. Zhang, X.D., et al. , Phil. Mag. Lett., 79, 519 (1999)Google Scholar
11. Mahajan, S., et al. , Acta Mater., 45, 2633,(1997).Google Scholar