scholarly journals Mechanism of Secondary Deformation of Extruded AZ31 Magnesium Alloy by Viscoplastic Self-Consistent Model

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Su Hui ◽  
Zhibing Chu ◽  
Huanzhu Wang ◽  
Yugui Li ◽  
Lifeng Ma ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Pole Figure ◽  
Mechanical Response ◽  
Texture Evolution ◽  
Az31 Magnesium Alloy ◽  
Axial Tension ◽  
Secondary Deformation ◽  
Self Consistent ◽  
Tension And Compression ◽  
Increased Activity

The viscoplastic self-consistent (VPSC) model is used to establish a combination of different deformation mechanisms. By using this model, axial tension and compression tests of extruded AZ31 magnesium alloy at room temperature are simulated. The influence of secondary deformation mechanism (prismatic <a> slip, pyramidal <c + a> slip, and 101¯1 compression twin) on mechanical response and texture evolution is expounded. Increased activity of the prismatic <a> slip is conducive for the improvement of flow stress in mechanical response during axial tension and for the splitting of pole densities in the {0002} pole figure during axial compression. However, increased activity of the pyramidal <c + a> slip causes the basal texture to transfer to the extrusion direction in the {0002} pole figure during axial compression. The 101¯1 compression twinning has a negligible influence on the plastic deformation and mechanical response of AZ31 magnesium alloy during axial tension and compression. However, the 101¯1 compression twinning should be included in VPSC modeling to predict the texture evolution accurately.

scholarly journals Numerical Investigation of Secondary Deformation Mechanisms on Plastic Deformation of AZ31 Magnesium Alloy Using Viscoplastic Self-Consistent Model

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 41 ◽  
Author(s):  
Yong Lian ◽  
Li Hu ◽  
Tao Zhou ◽  
Mingbo Yang ◽  
Jin Zhang
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Uniaxial Tension ◽  
Pole Figure ◽  
Mechanical Response ◽  
Texture Evolution ◽  
Deformation Mechanisms ◽  
Az31 Magnesium Alloy ◽  
Secondary Deformation ◽  
Self Consistent

Uniaxial tension and compression of AZ31 magnesium alloy were numerically investigated via the viscoplastic self-consistent (VPSC) model to shed a light on the effect of secondary deformation mechanisms (prismatic <a> slip, pyramidal <c+a> slip, and { 10 1 ¯ 1 } contraction twinning) during plastic deformation. The method adopted in the present study used different combinations of deformation mechanisms in the VPSC modeling. In terms of the pyramidal <c+a> slip, it served as the first candidate for sustaining the extra plastic strain during the plastic deformation. The improvement of activity in the pyramidal <c+a> slip contributed to the increase in the mechanical response and the splitting of pole densities in { 0002 } pole figure during uniaxial tension. As for the prismatic <a> slip, its increasing activity was not only conducive to the improvement of flow stress in mechanical response, but also responsible for the splitting of pole densities in { 0002 } pole figure during uniaxial compression. With respect to the { 10 1 ¯ 1 } contraction twinning, it had a negligible influence on the plastic deformation of AZ31 magnesium alloy in terms of the mechanical response as well as the slip and the twinning activities. However, it is better to include the { 10 1 ¯ 1 } contraction twinning in the VPSC modeling to more accurately predict the texture evolution.

Deformation and texture evolution in AZ31 magnesium alloy during uniaxial loading

2006 ◽  
Vol 54 (2) ◽  
pp. 549-562 ◽  
Author(s):  
S.-B. Yi ◽  
C.H.J. Davies ◽  
H.-G. Brokmeier ◽  
R.E. Bolmaro ◽  
K.U. Kainer ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Texture Evolution ◽  
Uniaxial Loading ◽  
Az31 Magnesium Alloy

scholarly journals Influence of Continuous Bending Process on Texture Evolution and Mechanical Properties of AZ31 Magnesium Alloy

2017 ◽  
Vol 31 (3) ◽  
pp. 225-233 ◽  
Author(s):  
Ting-Zhuang Han ◽  
Guang-Sheng Huang ◽  
Lun Huang ◽  
Bin Jiang ◽  
Guan-Gang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Texture Evolution ◽  
Az31 Magnesium Alloy ◽  
Bending Process ◽  
Continuous Bending

Relative Activities of Deformation Modes in AZ31 Magnesium Alloy Predicted by Mesoscopic Crystalline Model

2011 ◽  
Vol 399-401 ◽  
pp. 21-25
Author(s):  
De Liang Yin ◽  
Jin Qiang Liu ◽  
Xin Chen
Keyword(s):  
Magnesium Alloy ◽  
Room Temperature ◽  
Az31 Magnesium Alloy ◽  
Plastic Response ◽  
Hardening Behavior ◽  
Pyramidal Slip ◽  
Proposed Model ◽  
Tension And Compression ◽  
Strain Hardening Behavior ◽  
Deformation Modes

A mesoscopic crystalline model was proposed to quantitatively analyze the relative activities of deformation modes involved in the plastic deformation of an AZ31 magnesium alloy at room temperature. The plastic response of a cast AZ31 magnesium alloy with random texture can be well predicted by this model. It is demonstrated that the remarkable difference of relative activities of <c+a> pyramidal slip should be attributed to the different strain hardening behavior in tension and compression. Further TEM micrographs shows the occurrence of <c+a> pyramidal slip in compression, which confirms the validity of the proposed model.

Application of the VPSC Model to the Description of the Stress–Strain Response and Texture Evolution in AZ31 Mg for Various Strain Paths

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Nitin Chandola ◽  
Raja K. Mishra ◽  
Oana Cazacu
Keyword(s):  
Mechanical Response ◽  
Mechanical Test ◽  
Texture Evolution ◽  
Mean Field ◽  
Strain Curve ◽  
Temperature Deformation ◽  
Strain Response ◽  
Stress Strain ◽  
Self Consistent ◽  
Strain Paths

Accurate description of the mechanical response of AZ31 Mg requires consideration of its strong anisotropy both at the single crystal and polycrystal levels, and its evolution with accumulated plastic deformation. In this paper, a self-consistent mean field crystal plasticity model, viscoplastic self-consistent (VPSC), is used for modeling the room-temperature deformation of AZ31 Mg. A step-by-step procedure to calibrate the material parameters based on simple tensile and compressive mechanical test data is outlined. It is shown that the model predicts with great accuracy both the macroscopic stress–strain response and the evolving texture for these strain paths used for calibration. The stress–strain response and texture evolution for loading paths that were not used for calibration, including off-axis uniaxial loadings and simple shear, are also well described. In particular, VPSC model predicts that for uniaxial tension along the through-thickness direction, the stress–strain curve should have a sigmoidal shape.

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