Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-25T06:27:55.229Z Has data issue: false hasContentIssue false
  • English
  • Français

Strain Rate Dependence of the Flow Stress and Work-Hardening of Single Crystals of NI3(Al,Hf)B

Published online by Cambridge University Press:  22 February 2011

S. S. Ezz ,
Y. Q. Sun  and
P. B. Hirsch
S. S. Ezz
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX 1 3PH, UK.
Y. Q. Sun
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX 1 3PH, UK.
P. B. Hirsch
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX 1 3PH, UK.
Get access

Abstract

The strain rate sensitivity ß of the flow stress τ is associated with workhardening and β=(δτ/δln ε) is proportional to the workhardening increment τh = τ - τy, where τy is the strain rate independent yield stress. The temperature dependence of β/τh reflects changes in the rate controlling mechanism. At intermediate and high temperatures, the hardening correlates with the density of [101] dislocations on (010). The nature of the local obstacles at room temperature is not established.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 695
Copyright
Copyright © Materials Research Society 1995

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. Ezz, S.S. and Hirsch, P.B., Phil. Mag., A69, 105 (1994).Google Scholar
2. Ezz, S.S. and Hirsch, P.B., Phil. Mag., in press; also in this conference.Google Scholar
3. Sun, Y.Q., D. Phil. Thesis, University of Oxford (1990).Google Scholar
4. Staton-Bevan, A.E., Phil. Mag., A47, 939 (1983).Google Scholar
5. Cottrell, A.H. and Stokes, R.J., Proc. Roy. Soc. A233, 17 (1955).Google Scholar
6. Veyssiere, P., MRS Proceedings, 133, 175 (1989).Google Scholar
7. Takeuchi, S. and Kuramoto, E., Acta metall. 21, 415 (1973).Google Scholar
8. Hirsch, P.B., Phil. Mag. A69, 105 (1994); Prog. Mat. Sci. 36, 63 (1992).Google Scholar
9. Chou, C.T. and Hirsch, P.B., Phil. Mag. A68, 1097 (1993).Google Scholar
10. Ezz, S.S., Sun, Y.Q. and Hirsch, P.B. in 3rd Int. Conf. on High Temperature Intermetallics, San Diego (ASM International, 1994), in press.Google Scholar