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Unconfined Twist: a Simple Method to Prepare Ultrafine Grained Metallic Materials

Published online by Cambridge University Press:  15 March 2011

Yonghao Zhao ,
Xiaozhou Liao  and
Yuntian T. Zhu
Yonghao Zhao
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM-87545, U.S.A.
Xiaozhou Liao
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM-87545, U.S.A.
Yuntian T. Zhu*
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM-87545, U.S.A.
*
corresponding author: [email protected]
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Abstract

A new simple method – unconfined twist was employed to prepare ultrafine grained (UFG) Fe wire. A coarse grained (CG) Fe wire with a diameter of 0.85 mm was fixed at one end, and twisted at the other end. After maximum twist before fracture, in the cross-sectional plane, concentrically deformed layers with a width of several micrometers formed surrounding the center axis of the wire. The near-surface deformed layers consist of lamella grains with a width in submicrometer range. In the longitudinal plane, deformed bands (with a width of several micrometers) formed uniformly, which were composed of lamella crystallites (with a width in submicrometer range). The tensile yield strength and ultimate strength of the twisted Fe wire are increased by about 150 % and 100 % compared with the values of its CG counterpart.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 821: Symposium P – Nanoscale Materials & Modeling-Relations Among Processing, Microstructure and Mechanical Properties , 2004 , P8.10
Copyright
Copyright © Materials Research Society 2004

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References

1. Koch, C.C., Nanostruct. Mater. 9, 13 (1997).Google Scholar
2. Zhao, Y.H., Sheng, H.W. and Lu, K., Acta Mater. 49, 365 (2001); Y.H. Zhao, K. Zhang and K. Lu, Phys. Rev. B 66, 085404-01 (2002).Google Scholar
3. Gleiter, H., Prog. Mater. Sci. 33, 223 (1989).Google Scholar
4. Erb, U., Nanostruct. Mater. 6, 533 (1995).Google Scholar
5. Inoue, A., Zhang, T., Masumoto, T., Mater. Trans. Jpn 31, 177 (1990).Google Scholar
6. Zhao, Y.H., Zhang, K. and Lu, K., Phys. Rev. B 56, 14322 (1997).Google Scholar
7. Valiev, R.Z., Islamgaliev, R.K. and Alexandrov, I.V., Prog. Mater. Sci. 45, 103 (2000).Google Scholar
8. Segal, V.M., Reznikov, V.I., Drobyshevskiy, A.E. and Kopylov, V.I., Russ. Metall. (Metally) 1, 99 (1981).Google Scholar
9. Zhao, Y.H., Liao, X.Z., Jin, Z., Valiev, R.Z. and Zhu, Y.T., in Ultrafine-Grained Materials III, edited by Zhu, Y.T., Langdon, T.G., Valiev, R.Z., Semiatin, S.L., Shin, D.H. and Lowe, T.C. (The Minerals, Metals & Materials Society, 2004), p. 511.Google Scholar
10. Valiev, R.Z., Nanostruct. Mater. 6, 73 (1995); R.Z. Valiev, Mater. Sci. Eng. A234, 236 (1997).Google Scholar
11. Huang, J.Y., Zhu, Y.T., Jiang, H., Lowe, T.C., Acta Mater. 49, 1497 (2001); J.Y. Huang, X.Z. Liao, Y.T. Zhu, F. Zhou, E.J. Lavernia, Phil. Mag. 83, 1407 (2003).Google Scholar
12. Hall, E.O., Proc. Phys. Soc. B 64, 747 (1951).Google Scholar
13. Petch, N.J., J. Iron Steal Inst. 174, 25 (1953).Google Scholar