Modeling of the work hardening in magnesium alloy sheets

Balı́k, J.; Dobroň, Patrik; Chmelı́k, František; Kužel, R.; Drozdenko, Daria; Bohlen, Jan; Letzig, Dietmar; Lukáč, P.

doi:10.1016/j.ijplas.2015.08.001

Cited by 42 publications

(29 citation statements)

References 48 publications

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“…9(a) shows that these curves of strain hardening rate θ vs (σ-σ0.2) are almost parallel to each other before (σ-σ0.2) = 140 MPa at room temperature. It means that dynamic recovery, associated with the slope, is almost the same as stage III [35,36] .…”

Section: Discussionmentioning

confidence: 96%

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Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Zhao

Chen

Pan

et al. 2019

Journal of Materials Science & Technology

117

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The influence of Zn on the strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) magnesium alloys was investigated using uniaxial tensile tests at 10-3 s-1 at room temperature. The strain hardening rate, the strain hardening exponent and the hardening capacity were obtained from true plastic stress-strain curves. There were almost no second phases in the as-extruded Mg-Zn magnesium alloys. Average grain sizes of the four as-extruded alloys were about 17.8 μm. With increasing Zn content from 1 2 to 4 wt%, the strain hardening rate increased from 2850 MPa to 6810 MPa at (σ-σ0.2) = 60 MPa, the strain hardening exponent n increased from 0.160 to 0.203, and the hardening capacity, Hc increased from 1.17 to 2.34. The difference in strain hardening response of these Mg-Zn alloys might be mainly caused by weaker basal texture and more solute atoms in the α-Mg matrix with higher Zn content.

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Section: Discussionmentioning

confidence: 96%

“…Original dislocation tangling would hinder further movement of other dislocations. Considering the effects of grain size and dislocations, a recent model indicates that [10][11][12][13][14]35] :…”

Section: Discussionmentioning

confidence: 99%

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Zhao

Chen

Pan

et al. 2019

Journal of Materials Science & Technology

117

View full text Add to dashboard Cite

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“…2d and 3d). The upcoming decrease in the AE count rates is connected with the decrease in the free path of the moving dislocation owing to an increase in dislocation density resulting in the strain hardening of the material [39,40].…”

Section: General Findings During Pre-compression and Reverse Tensile mentioning

confidence: 99%

Investigating a twinning–detwinning process in wrought Mg alloys by the acoustic emission technique

Drozdenko

Bohlen

et al. 2016

Acta Materialia

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Two extruded magnesium alloys, AZ31 with a bimodal microstructure and ZE10 with a homogeneous microstructure, were pre-compressed and subsequently subjected to tensile loading. The acoustic emission (AE) technique was concurrently applied to determine the activity of particular deformation mechanisms. Significant changes in the AE response were correlated with the inflection points on the tensile curve. Twinning and detwinning processes were analyzed using the AE dataset. Particularly, nucleation of various types of twins and the influence of twins produced by pre-straining on the subsequent hardening behavior were investigated in detail. The output of the AE analysis was related to microstructure observations provided by the electron backscattered diffraction (EBSD) method.2

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“…AE is a powerful method for revealing the active deformation mechanisms and their development during loading. The AE technique was successfully used to investigate various metallic materials, especially with an hcp lattice, as it is highly sensitive to twin nucleation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermomechanical Treatment on Subsequent Deformation Behavior in a Binary Z1 Magnesium Alloy Studied by the Acoustic Emission Technique

et al. 2018

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Pre-straining of magnesium alloy modifies the final texture of the material and therefore leads to a different deformation behavior during subsequent loading. At the same time, heat treatment in the context of thermo-mechanical procedures is used as softening mechanism, as well as for age hardening processing. In mechanical conditions with twin-dominated deformation in textured magnesium alloys, the twin boundaries can be pinned if existing after a pre-deformation of samples and therefore influence their mobility. The impact of the ongoing mechanical behavior is discussed. In the present paper, a procedure of pre-compression and reverse tensile loading of extruded binary magnesium alloy Mg-1 wt% Zn (Z1) is used and intermediate aging at 200 C is applied in two different routes. The effect of the heat treatment on the flow behavior during subsequent mechanical loading is correlated with the dominating deformation mechanisms revealed by in situ acoustic emission measurements and ex situ scanning electron microscopy. The pinning of twin boundaries can restrict their mobility in experimental environments that favor the recovery of the samples. As a result, new twins easily nucleate if the concurrent re-orientation of the lattice is favorable for strain accommodation.

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Modeling of the work hardening in magnesium alloy sheets

Cited by 42 publications

References 48 publications

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Investigating a twinning–detwinning process in wrought Mg alloys by the acoustic emission technique

Effect of Thermomechanical Treatment on Subsequent Deformation Behavior in a Binary Z1 Magnesium Alloy Studied by the Acoustic Emission Technique

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