Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-02T22:44:18.063Z Has data issue: false hasContentIssue false
  • English
  • Français

Dynamic Embrittlement Of Beryllium-Strengthened Copper In Air

Published online by Cambridge University Press:  15 February 2011

Ranjani C. Muthiah ,
C. J. McMahon Jr.  and
Amitava Guha
Ranjani C. Muthiah
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
C. J. McMahon Jr.
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
Amitava Guha
Affiliation:
Brush Wellman Inc. 17876 St. Clair Avenue, Cleveland, OH 44110, USA.
Get access

Abstract

A precipitation-hardened Cu-0.26%Be alloy is used as a low-temperature model material for “dynamic embrittlement”, or quasi-static diffusion-controlled intergranular brittle fracture. This alloy is shown to undergo intergranular cracking in air at 150°C and to be almost free of this cracking in 2×10−6 Torr vacuum at 200°C. The time to failure is highly stress dependent. The temperature dependence of cracking was found to be 30 kcal/mole. This is about 50% greater than the activation energy for oxygen diffusion in copper, but the present experiments also include an unknown incubation time.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 409: Symposium Q – Fracture-Instablility Dynamics, scaling and Ductile/Brittle Behavior , 1995 , 189
Copyright
Copyright © Materials Research Society 1996

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. Bika, D., Pfaendtner, J. A., Menyhard, M., and McMahon, C. J. Jr,. Acta Metall. et Mater., 43, 1895 (1995).Google Scholar
2. Bika, D. and McMahon, C. J. Jr,., Acta Metall. et Mater., 43, 1909 (1995).Google Scholar
3. Liu, C. T. and White, C. L., Acta Metall., 35, 643 (1987).Google Scholar
4. Muthiah, R. C., Guha, A., and McMahon, C. J. Jr.,, 7th Intnl. Conf. on Intergranular and Interphase Boundaries in Materials, Lisbon, June 1995 (Proceedings in press).Google Scholar
5. NIH Image Home Page, “http://rsb.info.nih.gov/nih-image/”.Google Scholar
6. Dieter, G. E., in Mechanical Metallurgy. McGraw-Hill Book Co. (1988).Google Scholar
7. Tada, H., Paris, P., Irwin, G., in The Stress Analysis of Cracks Handbook. Del Research Corporation (1973)Google Scholar
8. Albert, E. and Kirchheim, R., Scripta Metall., 15, 673 (1981).Google Scholar
9. Pastorek, R. L. and Rapp, R. A., Trans. AIME, 245, 1711 (1969).Google Scholar
10. Misra, R. D. K., McMahon, C. J. Jr.,, and Guha, A., Scripta Metall. et Mater., 31, 1471 (1995).Google Scholar
11. Pfaendtner, J. A., unpublished research, Univ. of Penn. 1995.Google Scholar