Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium
Source abstract
Abstract
Abstract The twinning activity in random textured cast magnesium during room temperature tension and compression tests was monitored by neutron diffraction (ND). Variation of integrated intensities of selected diffraction peaks, characterizing the twinned volume in particularly oriented grains was compared with calculated Schmid factors for extension twinning of these grains. It is shown that in tension there is a direct proportion between the twinned volume and the maximum value of the Schmid factor for a given grain orientation. In contrast, in compression this relation is not valid. The twinned volume in this case is influenced by both deviation of the grain from the ideal orientation and its rotation around the c-axis. The experimental results are in good agreement with those obtained from elasto-plastic self-consistent (EPSC) modeling.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Temperature dependency of slip and twinning in plane strain compressed magnesium single crystals10.1016/j.actamat.2010.11.064 ↗
2. Avedesian · 1999
3. Deformation twinning10.1016/0079-6425(94)00007-7 ↗
4. Non-Schmid behaviour during secondary twinning in a polycrystalline magnesium alloy10.1016/j.actamat.2007.08.034 ↗
5. Statistical analyses of deformation twinning in magnesium10.1080/14786431003630835 ↗
6. Calculation of Schmid factors in magnesium: analysis of deformation behaviors10.1016/j.scriptamat.2012.05.042 ↗
7. Understanding of variant selection and twin patterns in compressed Mg alloy sheets via combined analysis of Schmid factor and strain compatibility factor10.1016/j.msea.2014.04.103 ↗
8. {10-12} Twin variants selection mechanisms during twinning, re-twinning and detwinning10.1016/j.msea.2014.06.088 ↗
9. In situ observation of collective grain-scale mechanics in Mg and Mg–rare earth alloys10.1016/j.actamat.2014.07.048 ↗
10. On the role of anomalous twinning in the plasticity of magnesium10.1016/j.actamat.2015.10.043 ↗
11. Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction10.1080/01418619908210386 ↗
12. Investigation of deformation twinning in a fine-grained and coarse-grained ZM20 Mg alloy: combined in situ neutron diffraction and acoustic emission10.1016/j.actamat.2009.10.057 ↗
13. Study of the loading mode dependence of the twinning in random textured cast magnesium by acoustic emission and neutron diffraction methods10.1016/j.msea.2014.02.051 ↗
14. Validating a polycrystal model for the elastoplastic response of magnesium alloy AZ31 using in situ neutron diffraction10.1016/j.actamat.2006.06.020 ↗
15. In situ neutron diffraction investigation of deformation twinning and pseudoelastic-like behaviour of extruded AZ31 magnesium alloy10.1016/j.ijplas.2008.08.002 ↗
16. Investigation of the dependence of deformation mechanisms on solute content in polycrystalline Mg-Al magnesium alloys by neutron diffraction and acoustic emission10.1016/j.jallcom.2015.03.258 ↗
17. SMARTS - a spectrometer for strain measurement in engineering materials10.1007/s003390201747 ↗
18. Reorientation and stress relaxation due to twinning: modeling and experimental characterization for Mg10.1016/j.actamat.2008.01.057 ↗
19. Effect of dislocation transmutation on modeling hardening mechanisms by twinning in magnesium10.1016/j.ijplas.2011.09.002 ↗
20. Numerical analysis of twin thickening process in magnesium alloys10.1016/j.actamat.2016.10.068 ↗
21. Plastic relaxation of the internal stress induced by twinning10.1016/j.actamat.2013.09.024 ↗
22. Flow asymmetry and nucleation stresses of twinning and non-basal slip in magnesium10.1016/j.ijplas.2012.11.004 ↗