Hybrid nanostructured aluminum alloy with super-high strength

Zhi Wang, Rui T. Qu, Sergio Scudino, Bao A. Sun, Konda G. Prashanth, Dmitri V. Louzguine-Luzgin, Ming W. Chen, Zhe F. Zhang, J'rgen Eckert

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Methods to strengthen aluminum alloys have been employed since the discovery of the age-hardening phenomenon in 1901. The upper strength limit of bulk Al alloys is - 0.7 GPa by conventional precipitation strengthening and increases to > GPa through grain refinement and amorphization. Here we report a bulk hybrid nanostructured Al alloy with high strength at both room temperature and elevated temperatures. In addition, based on high-resolution transmission electron microscopic observations and theoretical analysis, we attribute the strengthening mechanism to the composite effect of the high-strength nanocrystalline fcc-Al and nano-sized intermetallics as well as to the confinement effect between these nano phases. We also report the plastic deformation of nano-sized intermetallics and the occurrence of a high density of stacking faults and twins in fcc-Al after low-strain-rate deformation at room and high temperatures. Our findings may be beneficial for designing highstrength materials for advanced structural applications.

Original languageEnglish
Article numbere229
JournalNPG Asia Materials
Volume7
Issue number12
DOIs
Publication statusPublished - 2015 Dec 18

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

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    Wang, Z., Qu, R. T., Scudino, S., Sun, B. A., Prashanth, K. G., Louzguine-Luzgin, D. V., Chen, M. W., Zhang, Z. F., & Eckert, J. (2015). Hybrid nanostructured aluminum alloy with super-high strength. NPG Asia Materials, 7(12), [e229]. https://doi.org/10.1038/am.2015.129