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 journalArticlepeer-review

    263 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 - 2006

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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