On the Swift effect and twinning in a rolled magnesium alloy under free-end torsion

X. Q. Guo, W. Wu, P. D. Wu, H. Qiao, K. An, P. K. Liaw

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91 Scopus citations

Abstract

We experimentally and numerically study the large-strain free-end torsion of a rolled magnesium alloy. It is found that a torsion sample with its axial direction parallel to the normal direction elongates axially, while a sample with its axial direction along the rolling direction contracts axially. It is shown that this Swift effect, i.e., the second-order axial effect under free-end torsion, is mainly due to extension twinning.

Original languageEnglish
Pages (from-to)319-322
Number of pages4
JournalScripta Materialia
Volume69
Issue number4
DOIs
StatePublished - Aug 2013

Funding

X.Q. Guo was supported by the National Basic Research Program of China (2007CB209400) and the 111 Project of China (B07028). P.D. Wu and H. Qiao were supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). Research at Oak Ridge National Laboratory’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. P.K. Liaw very much appreciates the financial support from the US National Science Foundation (DMR-0909037, CMMI-0900271, and CMMI-1100080), the Department of Energy (DOE), Office of Nuclear Energy’s Nuclear Energy University Program (NEUP) 00119262, and the DOE, Office of Fossil Energy , National Energy Technology Laboratory (DE-FE-0008855) with C. Huber, C.V. Cooper, D. Finotello, A. Ardell, E. Taleff, V. Cedro, R.O. Jensen, L. Tan, and S. Lesica as contract monitors.

Keywords

  • Magnesium alloys
  • Texture
  • Torsion
  • Twinning Slip

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