Tailoring stacking fault energy for high ductility and high strength in ultrafine grained Cu and its alloy

Y. H. Zhao, Y. T. Zhu, X. Z. Liao, Z. Horita, T. G. Langdon

Research output: Contribution to journalArticle

254 Citations (Scopus)

Abstract

Bulk ultrafine grained (UFG) materials produced by severe plastic deformation often have low ductility. Here the authors report that simultaneous increases in ductility and strength can be achieved by tailoring the stacking fault energy (SFE) via alloying. Specifically, UFG bronze (Cu 10 wt. % Zn) with a SFE of 35 mJ/m 2 was found to have much higher strength and ductility than UFG copper with a SFE of 78 mJ/m 2. Accumulations of both twins and dislocations during tensile testing play a significant role in enhancing the ductility of the UFG bronze. This work demonstrates a strategy for designing UFG alloys with superior mechanical properties.

Original languageEnglish
Article number121906
JournalApplied Physics Letters
Volume89
Issue number12
DOIs
Publication statusPublished - Sep 29 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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