| [Yang Bowen,Ma Chuanchuan,Xue Chun,Tuo Leifeng,Gui Hailian and Chu Zhibing.Effect of Initial Texture on Twinning and Texture Evolution of AZ31 Magnesium Alloy[J].Rare Metal Materials and Engineering,2023,52(1):125~132.] |
| Effect of Initial Texture on Twinning and Texture Evolution of AZ31 Magnesium Alloy |
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| Received:April 25, 2022 Revised:August 09, 2022 |
| DOI： |
| Key words: AZ31 magnesium alloy crystal plasticity finite element initial texture twin crystal mechanical property |
| Foundation item:国家重点研发计划（No. 2018YFB1307902）,国家自然科学基金（52175353），山西青年拔尖人才工程，山西省青年科学基金（No. 201901D211312）,山西省高校优秀青年学术带头人（编号：2019045），山西省高等学校优秀成果培育项目（No.2019KJ028），山西省研究生教育创新项目（No.2019SY482），山西省重点研发项目（201903D121043）。 |
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| Abstract: |
| To study the deformation twins and plastic anisotropy of AZ31 magnesium alloy, based on the plastic constitutive theory of rate-correlated crystals, a magnesium alloy model with different initial textures, including slip and twin deformation mechanisms, was established by the finite element method. Besides, the volume fraction of twin crystals was introduced into the model. The relationship among texture evolution, twins, and mechanical properties during compression was studied. Results show that the plastic behavior of crystal depends largely on the initial texture, and the difference in the initial texture leads to the obvious anisotropy of compression behavior: high axial yield and tensile strength and low radial yield and tensile strength. During the compressive plastic deformation process, with increasing the deformation, the volume fraction of activated twin crystal is increased. In addition, the higher the volume fraction of radial compressive activated twin crystal, the lower the volume fraction of axial compressive activated twin crystal. The points of obvious twin crystal appearance in the simulation coincide with those of stress mutation. When the volume fraction of twin crystal reaches a certain value, the stress suddenly changes, the crystal orientation changes significantly, and the new slip system is activated, reflecting the influence of the coupling of slip and twin crystal mechanisms on the mechanical properties of AZ31 magnesium alloy. |
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