Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-01-28T23:08:56.170Z Has data issue: false hasContentIssue false
  • English
  • Français

Experiment and FEM Analysis of Tensile Behavior of Bimodal Nanocrystalline Al-Mg Alloys

Published online by Cambridge University Press:  15 March 2011

Zonghoon Lee ,
Johnathan Lee ,
Enrique J. Lavernia  and
Steven R. Nutt
Zonghoon Lee
Affiliation:
Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, U.S.A.
Johnathan Lee
Affiliation:
Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, U.S.A.
Enrique J. Lavernia
Affiliation:
Department of Materials Science, University of Southern California, Los Angeles, CA 90089-0241, U.S.A.
Steven R. Nutt
Affiliation:
Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, U.S.A.
Get access

Abstract

The tensile behavior of bimodal nanocrystalline Al-7.5Mg alloys was investigated using experiments and two-dimensional axisymmetric elastic-plastic finite element method (FEM). Cryomilled nanocrystalline powders blended with 15% and 30% unmilled coarse-grained powders were consolidated by hot isostatic pressing followed by extrusion to produce bulk bimodal nanocrystalline Al-7.5Mg alloys, which were comprised of nanocrystalline grains separated by coarse-grain regions. The calculated stress-strain curves have acceptable agreement with experimental curves of the bimodal structures. The bimodal Al-7.5Mg alloys show reasonable ductility while retaining enhanced strength compared to conventional alloys and nanocrystalline metals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 821: Symposium P – Nanoscale Materials & Modeling-Relations Among Processing, Microstructure and Mechanical Properties , 2004 , P9.11
Copyright
Copyright © Materials Research Society 2004

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

1. Ming, Y., Chen, M., Zhou, F. and Ma, E., Nature, 2002, 419, pp. 912–915 Google Scholar
2. Legros, M., Elliot, B.R., Rittner, M.N., Weertman, J.R. and Hemker, K.J., Phil. Mag. A, 2000, 80(4), pp. 1017–1026.Google Scholar
3. Tellkamp, V.L., Melmed, A., and Lavernia, E.J., Met. Mat. Trans. A, 2001, 32, pp. 2335–2343.Google Scholar
4. Hayes, R.W., Rodriguez, R. and Lavernia, E.J., Acta Mater., 2001, 49, pp. 4055–68.Google Scholar
5. Lee, Z., Rodriguez, R., Lavernia, E.J. and Nutt, S.R., Ultrafine Grained Materials II, edited by Zhu, Y.T., Langdon, T.G., Mishra, R.S., Semiatin, S.L., Saran, M.J., and Lowe, T.C., TMS, Seattle, WA, 2002, pp. 653–59.Google Scholar
6. Lee, Z., Rodriguez, R., Hayes, R. W., Lavernia, E. J. and Nutt, S. R., Metall. Mater. Trans. A, 2003, 34A, pp. 1473–1481.Google Scholar
7. Siegel, R.W., MRS Bull., 1990, pp.60–67.Google Scholar
8. Koch, C.C., NanoStructured Materials, 1997, 9, pp.13–22.Google Scholar
9. Suryanarayana, C. and Koch, C.C. in Non-Equilibrium Processing of Materials, Suryanarayana, C., ed., Pergamon, New York, 1999, pp.313–344.Google Scholar
10. Sun, X.K., Cong, H.T., Sun, M. and Yang, M.C.: Metall. Mater. Trans. A, 2000, 31A, pp. 1017–24.Google Scholar