Paper Title:
EBSD Analysis and Theoretical Prediction of Twin Orientations during Compression in Mg-3Al-1Zn
  Abstract

In order to improve the formability of magnesium alloys at low temperatures, a thorough understanding of the twinning behaviour is required. Cylindrical samples were compressed uniaxially from room temperature to 250oC, with the compression axis parallel to the transverse direction (TD) of a hot-rolled Mg-3Al-1Zn sheet. Twinning was investigated by use of orientation maps constructed from electron backscattered diffraction (EBSD) data. Tensile twinning was observed at all temperatures. In some grains two twin variants were observed. For each twin the specific twinning variant among the 6 possible twinning systems was identified by consideration of the twinning rotation. The twinning was then investigated by comparing the specific twin variant with the calculated Schmid factors for all 6 possible twin variants. In cases of grains that are completely reoriented by two twin variants it is possible to back-calculate the initial grain orientation by considering all possible twin rotations for both of the twin variants. It was found that the operative twin variants where those with the highest Schmid factors.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
627-630
DOI
10.4028/www.scientific.net/KEM.353-358.627
Citation
J. Jiang, A. Godfrey, Q. Liu, "EBSD Analysis and Theoretical Prediction of Twin Orientations during Compression in Mg-3Al-1Zn", Key Engineering Materials, Vols. 353-358, pp. 627-630, 2007
Online since
September 2007
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Price
$32.00
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