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基于3D CA的AZ31鎂合金動態(tài)再結(jié)晶行為研究
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太原科技大學(xué) 重型機(jī)械教育部工程研究中心

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國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目（2018YFB1307902），國家自然科學(xué)基金資助項(xiàng)目（U1710113），中國博士后科學(xué)基金項(xiàng)目（2017M622903），山西省重點(diǎn)研發(fā)計(jì)劃重點(diǎn)項(xiàng)目（201703D111003，201703D111002），山西省研究生聯(lián)合培養(yǎng)基地人才培養(yǎng)項(xiàng)目（2018JD33），山西省研究生教育創(chuàng)新項(xiàng)目（2019SY482），山西省高等學(xué)校優(yōu)秀青年學(xué)術(shù)帶頭人（2019045），山西省高等學(xué)校優(yōu)秀成果培育項(xiàng)目（2019KJ027）.


Dynamic Recrystallization Behavior of AZ31 Magnesium Alloy Based on 3D CA
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National Key R&D Program (No. 2018YFB1307902), National Natural Science Foundation of China (No. U1710113), China Post-doctoral Science Foundation (No. 2017M622903), Shanxi Key R&D Project (No. 201703D111003，201703D111002), Shanxi Province Graduate Joint Talent Training Project (No. 2018JD33), Shanxi Graduate Education Innovation Project (2019SY482), Outstanding Young Academic Leader of Colleges and Universities in Shanxi Province (NO.2019045), Shanxi Province Outstanding Achievement Cultivation Project (NO.2019KJ027).

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    摘要:

    本文建立了三維元胞自動機(jī)(3D-CA)模型，通過熱壓縮試驗(yàn)和電子背散射衍表征技術(shù)(EBSD)，對AZ31鎂合金在熱變形過程中的微觀組織演化規(guī)律進(jìn)行可視化和定量預(yù)測。根據(jù)試驗(yàn)得出的真應(yīng)力-應(yīng)變曲線，確定了3D-CA模型參數(shù)在試驗(yàn)條件下的取值，建立了模型參數(shù)與變形條件(應(yīng)變、變形溫度和應(yīng)變速率)之間的關(guān)系。利用所建立的3D-CA模型，對AZ31鎂合金在熱變形過程中的流動行為和微觀組織演化進(jìn)行模擬和討論。結(jié)果表明:再結(jié)晶體積分?jǐn)?shù)隨著應(yīng)變的增大而增加，隨著變形溫度的增大或應(yīng)變速率降低而增大，提高應(yīng)變速率或降低溫度可以細(xì)化再結(jié)晶晶粒。模擬結(jié)果與實(shí)驗(yàn)結(jié)果吻合較好，相對誤差值在4.5%-16.2%之間，所建立的3D-CA模型能夠較準(zhǔn)確地預(yù)測鎂合金AZ31的微觀組織演化。

    Abstract:

    A three-dimensional cellular automata (3D-CA) model was established to visualize and quantitatively predict the microstructural evolution of AZ31 magnesium alloy during hot deformation by thermal compression test and electronic backscatter characterization (EBSD). According to the true stress-strain curve obtained from the test, the values of the parameters of the 3D-CA model under the test conditions are determined, and the relationship between the parameters of the model and the deformation conditions (strain, deformation temperature and strain rate) is established. The flow behavior and microstructure evolution of AZ31 magnesium alloy during hot deformation were simulated and discussed by using the established 3D-CA model. The results show that the recrystallization integral increases with the increase of strain, and increases with the increase of deformation temperature or the decrease of strain rate. Raising strain rate or decreasing temperature can refine recrystallized grains. The simulation results are in good agreement with the experimental results. The relative error is between 4.5% and 16.2%. The 3D-CA model can accurately predict the microstructure evolution of magnesium alloy AZ31.

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引用本文

李偉,楚志兵,王環(huán)珠,馬立峰,李玉貴,帥美榮,蘇輝,薛春.基于3D CA的AZ31鎂合金動態(tài)再結(jié)晶行為研究[J].稀有金屬材料與工程,2020,49(9):3091~3098.[liwei, chuzhibing, wanghuanzhu, malifeng, liyugui, shuaimeirong, suhui, xuechun. Dynamic Recrystallization Behavior of AZ31 Magnesium Alloy Based on 3D CA[J]. Rare Metal Materials and Engineering,2020,49(9):3091~3098.]
DOI：10.12442/j. issn.1002-185X.20190723

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  • 收稿日期:2019-09-04
  • 最后修改日期:2019-12-11
  • 錄用日期:2019-12-11
  • 在線發(fā)布日期: 2020-10-15
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