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Texture Evolution During Low-Temperature Superplasticity in 5083 and 5052 Al-Mg Alloys

Published online by Cambridge University Press:  10 February 2011

S.W. Su ,
I.C. Hsiao  and
J.C. Huang
S.W. Su
Affiliation:
Institute of Materials Science and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, R.O.C
I.C. Hsiao
Affiliation:
Institute of Materials Science and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, R.O.C
J.C. Huang
Affiliation:
Institute of Materials Science and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, R.O.C
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Abstract

Absyract:

Low temperature superplasticity (LTSP) at 250°C and 1×10−3 s−1 was observed in the 5083 Al-Mg base alloy after thermomechanical treatments (TMT). With increasing TMT rolling strain, the high angle grain boundary fraction increased, more favorable for the further operation of grain boundary sliding and LTSP. The strong texture components and bimodal misorientation distributions present after TMT were not affected by static annealing at 250 °C but evolved gradually into a random orientation distribution during LTSP straining from 30% to 100%. When the LTSP elongation was greater than 150%, the macro-deformation anisotropy R ratio would finally reach a stable level. It seems that the LTSP performance was controlled by a large fraction of high angle boundaries, but not by the special coincidence site lattice boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 601: Symposium HH – Superplasticity-Current Status & Future Potential , 1999 , 49
Copyright
Copyright © Materials Research Society 2000

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References

1. Hsiao, I. C. and Huang, J. C.: Scripta Mater., 40, p. 697 (1999).10.1016/S1359-6462(98)00460-6Google Scholar
2. Hsiao, I. C., Huang, J. C., and Su, S. W., Mater. Trans. JIM, 40, p. 744 (1999).10.2320/matertrans1989.40.744Google Scholar
3. Pu, H. P., Liu, F. C., and Huang, J. C.: Metall. Mater. Trans., 26A, p. 1,153 (1995).Google Scholar
4. Friedman, P. A. and Ghosh, A. K.: Metall. Mater. Trans., 27A, p. 3,827 (1996).Google Scholar
5. McNelley, T. R. and McMahon, M. E., Metall. Mater. Trans., 27A, p. 2,252 (1996).Google Scholar