کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1499582 | 993313 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Twinning-induced anomaly in the yield surface of highly textured Mg–3Al–1Zn plate Twinning-induced anomaly in the yield surface of highly textured Mg–3Al–1Zn plate](/preview/png/1499582.png)
The evolution of stress and lateral strains with applied strain was determined by uniaxial loading in the principal directions of a highly textured Mg–3Al–1Zn plate. The material exhibits negative lateral strain ratios when twinning dominates deformation. This leads to a yield surface with a distinct shape, with a high curvature under a balanced biaxial stress state and a shift in plane-strain compression conditions from the third to the second and fourth quadrants of the yield surface.
Research highlights
► We examine the texture effects on lateral strains of AZ31 alloys.
► Calculation of strain field caused by twinning suggests a negative R-value.
► In-plane compression test of AZ31 proves the negative R-value.
► Extensive twinning leads to an anomalous yield surface.
Journal: Scripta Materialia - Volume 64, Issue 10, May 2011, Pages 958–961