Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-19T09:50:59.845Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effects of Precipitates and Mn-bearing Particles on the High Strain-Rate Compression of High Strength Aluminum

Published online by Cambridge University Press:  31 January 2011

Khalil Ibrahim Elkhodary ,
William Lee ,
Bryan Cheeseman ,
Lipeng Sun ,
Donald W Brenner  and
Mohammed Zikry
Khalil Ibrahim Elkhodary
Affiliation:
[email protected], north carolina state university, mechanical and aerospace engineering, raleigh, North Carolina, United States
William Lee
Affiliation:
[email protected], north carolina state university, mechanical and aerospace engineering, raleigh, North Carolina, United States
Bryan Cheeseman
Affiliation:
[email protected], Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland, United States
Lipeng Sun
Affiliation:
[email protected], North Carolina State University, Materials Science and Engineering, Raleigh, North Carolina, United States
Donald W Brenner
Affiliation:
[email protected], North Carolina State University, Materials Science and Engineering, Raleigh, North Carolina, United States
Mohammed Zikry
Affiliation:
[email protected], North Carolina State University, Mechanical and Aerospace Engineering, 2412 Broughton Hall, 2601 Stinson Drive - Campus Box 7910, Raleigh, North Carolina, 27695, United States, 919-515-5237, 919-515-7968
Get access

Abstract

Transmission electron microscopy (TEM) and specialized dislocation-density based crystal-plasticity formulations and finite-element schemes were used to investigate the effects of nano-sized precipitates and micro-sized Mn-bearing particles on the behavior of Al-Cu-Mg-Ag alloys. By accurately representing crystallography and the morphology of the different precipitates, accurate predictions can be obtained that indicate that the nano-sized Ω and θ’ precipitates promote ductility and toughness by inhibiting shear-strain localization; whereas the micro-sized dispersed particles intensify localization. Collectively, the precipitates and dispersed particles, however, promote the strengthening of the alloy.

Keywords

crystallinenanoscaleAl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1225: Symposium HH – Multiscale Polycrystal Mechanics of Complex Microstructures , 2009 , 1225-HH04-08
Copyright
Copyright © Materials Research Society 2010

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] Orsini, V., Zikry, M.: International Journal of Plasticity, 2001, vol. 17, pp. 1393–417.Google Scholar
[2] Ashmawi, W., Zikry, M.: Journal of Engineering Materials and Technology, 2002, vol. 124, pp. 88–96.Google Scholar
[3] Mughrabi, H.: Materials Science Engineering, 1987, vol. 85, pp. 15–31.Google Scholar
[4] Kameda, T., Zikry, M. A.: Scripta Materialia, 1996, vol. 38, pp. 631–36.Google Scholar
[5] Garg, A., Howe, J. M.: Acta Metallurgica et Materialia, 1991, vol. 39, pp. 1939–46.Google Scholar
[6] Ringer, S., Hono, K.: Materials Characterization, 2000, vol. 44, pp. 101–31.Google Scholar
[7] Bonnet, R., Loubradou, M.: Physica Status Solidi. A, Applied Research, 2002, vol. 194, pp. 173–91.Google Scholar
[8] Wang, S. C., Starink, M. J.: International Materials Review, 2005, vol. 50, pp. 193–215 Google Scholar
[9] Elkhodary, K., Sun, L., Irving, D., Brenner, D., Ravichandran, G., Zikry, M. A.: Journal of Applied Mechanics, 2009, vol. 76, pp. 051306–1Google Scholar
[10] Brown, L. M., Stobbs, W. M.: Philosophical Magazine, 1971, vol. 23, pp. 1201–33.Google Scholar
[11] Polmear, I. J., Alloys, Light: From Traditional Alloys to Nanocrystals, in: Elsevier/ Butterworth-Heinemann, Burlington, MA, 2006.Google Scholar