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Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions

  • Michael Huppmann , Sebastian Stark and Walter Reimers
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 101 Issue 11

Abstract

A study of the internal strain (stress) evolution during uni-axial cyclic deformation along the prior extrusion axis with fully reversed total constant strain amplitudes εA (0.5% < εA < 5%) was investigated by using in-situ high energy synchrotron X-ray diffraction. The deformation is dominated by {1012} 〈1011〉 twinning and detwinning mechanisms within the textured hot extruded magnesium alloy AZ31. The results show a strong load partitioning between the internal stresses of (1010) and (1120) parent grains and of the (0002) twinned daughter grains that are relaxed. Following the evolution of the twinning/detwinning behavior and the hkil dependent microstresses as a function of cycling numbers, two different regimes were observed whereby it was found that the transition between these regimes is marked by an applied strain amplitude of eA = 0.625%.

Keywords: Magnesium; Cyclic deformation; Twinning; Synchrotron X-ray diffraction; Microstresses

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Received: 2009-2-2
Accepted: 2010-1-8
Published Online: 2013-06-11
Published in Print: 2010-11-01

© 2010, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110378
Keywords for this article
Magnesium; Cyclic deformation; Twinning; Synchrotron X-ray diffraction; Microstresses

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  5. Basic
  6. Multiscale simulations on the grain growth process in nanostructured materials
  7. Thermodynamic re-modeling of the Co–Gd system
  8. Microstructure and tribological properties of in-situ Y2O3/Ti-5Si alloy composites
  9. Phase relations in the ZrO2–Nd2O3–Y2O3 system: experimental study and CALPHAD assessment
  10. Phase transition in nanocrystalline iron: Atomistic-level simulations
  11. Thermodynamic assessment of the Cr–Al–Nb system
  12. Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system
  13. Elastic constants and thermophysical properties of Al–Mg–Si alloys from first-principles calculations
  14. Predicting microsegregation in multicomponent aluminum alloys – progress in thermodynamic consistency
  15. Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
  16. Applied
  17. Phase equilibria in the Fe–Ti–V system
  18. A thermodynamic description of the Ce–La–Mg system
  19. Molar volume calculation of Ga–Bi–X (X=Sn, In) liquid alloys using the general solution model
  20. Microstructural analysis in the vacuum brazing of copper to copper using a phosphor–copper brazing filler metal
  21. Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions
  22. DGM News
  23. DGM News
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