The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion

Y. B. Wang; X. Z. Liao; Y. H. Zhao; E. J. Lavernia; S. P. Ringer; Z. Horita; T. G. Langdon; Y. T. Zhu

doi:10.1016/j.msea.2010.04.036

The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion

Y. B. Wang, X. Z. Liao, Y. H. Zhao, E. J. Lavernia, S. P. Ringer, Z. Horita, T. G. Langdon, Y. T. Zhu

Research output: Contribution to journal › Article › peer-review

148 Citations (Scopus)

Abstract

A recent model developed to predict the smallest grain sizes obtainable by severe plastic deformation has worked well for materials with medium to high stacking fault energies (SFEs) but not for those with low SFEs. To probe this issue, experiments were conducted using a Cu-30wt.% Zn alloy with a very low SFE of 7mJ/m² as the model material. High-pressure torsion was used as the grain refinement technique. The results indicate that stacking faults and twin boundaries play a key role in the grain refinement process such that the smallest achievable grain size is determined by the highest stacking fault and twin density that the system is able to produce. An amorphization of grain boundaries was also observed in the final structure. These observations are very different from those reported for materials having medium to high SFEs and they confirm the operation of a different grain refinement mechanism.

Original language	English
Pages (from-to)	4959-4966
Number of pages	8
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	527
Issue number	18-19
DOIs	https://doi.org/10.1016/j.msea.2010.04.036
Publication status	Published - Jul 2010

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2010.04.036

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Wang, Y. B., Liao, X. Z., Zhao, Y. H., Lavernia, E. J., Ringer, S. P., Horita, Z., Langdon, T. G., & Zhu, Y. T. (2010). The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 527(18-19), 4959-4966. https://doi.org/10.1016/j.msea.2010.04.036

The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion. / Wang, Y. B.; Liao, X. Z.; Zhao, Y. H. et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 527, No. 18-19, 07.2010, p. 4959-4966.

Research output: Contribution to journal › Article › peer-review

Wang, YB, Liao, XZ, Zhao, YH, Lavernia, EJ, Ringer, SP, Horita, Z, Langdon, TG & Zhu, YT 2010, 'The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 527, no. 18-19, pp. 4959-4966. https://doi.org/10.1016/j.msea.2010.04.036

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abstract = "A recent model developed to predict the smallest grain sizes obtainable by severe plastic deformation has worked well for materials with medium to high stacking fault energies (SFEs) but not for those with low SFEs. To probe this issue, experiments were conducted using a Cu-30wt.% Zn alloy with a very low SFE of 7mJ/m2 as the model material. High-pressure torsion was used as the grain refinement technique. The results indicate that stacking faults and twin boundaries play a key role in the grain refinement process such that the smallest achievable grain size is determined by the highest stacking fault and twin density that the system is able to produce. An amorphization of grain boundaries was also observed in the final structure. These observations are very different from those reported for materials having medium to high SFEs and they confirm the operation of a different grain refinement mechanism.",

author = "Wang, {Y. B.} and Liao, {X. Z.} and Zhao, {Y. H.} and Lavernia, {E. J.} and Ringer, {S. P.} and Z. Horita and Langdon, {T. G.} and Zhu, {Y. T.}",

note = "Funding Information: The authors are grateful for scientific and technical input and support from the Australian Microscopy & Microanalysis Research Facility node at the University of Sydney. This project was supported by the Australian Research Council [Grant No. DP0772880 (Y.B.W., and X.Z.L.)], the Office of Naval Research [Grant Nos. N00014-04-1-0370 and N00014-08-1-0405 (Y.H.Z. and E.J.L.)], the National Science Foundation of the United States (Grant No. DMR-0855009, T.G.L.) and the U.S. Army Research Office and Army Research Laboratory (Y.T.Z.).",

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AU - Langdon, T. G.

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The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion

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