基于刚塑性材料在平面应力条件下变形的 M?K 理论对 AZ31镁合金在温热状态下的成形极限图(FLD)进行了预测，在理论预测时采用von Mises和Hill’48屈服准则。通过单向拉伸实验获得所用的AZ31镁合金板的力学性能，同时在分析时引入Fields?Backofen本构方程。此外，采用刚性凸模胀形方法获得了AZ31镁合金板在不同温度下的实验FLD曲线用以验证理论预测结果。通过对473 K和523 K下理论预测FLD与实验FLD间的比较，发现理论预测结果受计算时所采用的屈服准则的影响，特别是在温度较低时。采用 Hill’48二次型各向异性屈服准则获得的FLD与实验数据有较好的一致性。
A theoretical prediction on forming limit diagram (FLD) of AZ31 magnesium alloy sheet was developed at warm temperatures based on the M?K theory. Two different yield criteria of von Mises and Hill’48 were applied in this model. Mechanical properties of AZ31 magnesium alloy used in the prediction were obtained by uniaxial tensile tests and the Fields?Backofen equation was incorporated in the analysis. In addition, experimental FLDs of AZ31 were acquired by conducting rigid die swell test at different temperatures to verify the prediction. It is demonstrated from a comparison between the predicted and the experimental FLDs at 473 K and 523 K that the predicted results are influenced by the type of yield criterion used in the calculation, especially at lower temperatures. Furthermore, a better agreement between the predicted results and experimental data for AZ31 magnesium alloy sheet at warm temperatures was obtained when Hill’48 yield criterion was applied.
参考文献
| [1] | N. Stanford;K. Sotoudeh;P.S. Bate.Deformation mechanisms and plastic anisotropy in magnesium alloy AZ31[J].Acta materialia,201112(12):4866-4874. |
| [2] | H. Takuda;T. Morishita;T. Kinoshita.Modelling of formula for flow stress of a magnesium alloy AZ31 sheet at elevated temperatures[J].Journal of Materials Processing Technology,20050(0):1258-1262. |
| [3] | S. H. Zhang;K. Zhang;Y. C. Xu;Z. T. Wang;Y. Xu;Z. G. Wang.Deep-drawing of magnesium alloy sheets at warm temperatures[J].Journal of Materials Processing Technology,20071/3(1/3):147-151. |
| [4] | Yao H.;Cao J..Prediction of forming limit curves using an anisotropic yield function with prestrain induced backstress[J].International Journal of Plasticity,20028(8):1013-1038. |
| [5] | Jain, A;Duygulu, O;Brown, DW;Tome, CN;Agnew, SR.Grain size effects on the tensile properties and deformation mechanisms of a magnesium alloy, AZ31B, sheet[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,20081/2(1/2):545-555. |
| [6] | Fuh-Kuo Chen;Tyng-Bin Huang.Formability of stamping magnesium-alloy AZ31 sheets[J].Journal of Materials Processing Technology,20033(3):643-647. |
| [7] | 钟敏;唐伟琴;李大永;彭颖红.AZ31B镁合金板材温热成形极限实验研究[J].塑性工程学报,2011(5):59-63. |
| [8] | Mekonen, M.N.;Steglich, D.;Bohlen, J.;Stutz, L.;Letzig, D.;Mosler, J..Experimental and numerical investigation of Mg alloy sheet formability[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:204-214. |
| [9] | C. Bruni;A. Forcellese;F. Gabrielli;M. Simoncini.Effect of temperature, strain rate and fibre orientation on the plastic flow behaviour and formability of AZ31 magnesium alloy[J].Journal of Materials Processing Technology,201010(10):1354-1363. |
| [10] | Y. S. Lee;Y. N. Kwon;S. H. Kang;S. W. Kim;J. H. Lee.Forming limit of AZ31 alloy sheet and strain rate on warm sheet metal forming[J].Journal of Materials Processing Technology,20081-3(1-3):431-435. |
| [11] | Chiba, R.;Takeuchi, H.;Kuroda, M.;Hakoyama, T.;Kuwabara, T..Theoretical and experimental study of forming-limit strain of half-hard AA1100 aluminium alloy sheet[J].Computational Materials Science,2013:61-71. |
| [12] | 李小强;宋楠;郭贵强.2B06铝合金板成形极限图的实验测定与理论预测[J].中国有色金属学报（英文版）,2012(z2):335-342. |
| [13] | M. C. Butuc;J. J. Gracio;A. Barata da Rocha.A theoretical study on forming limit diagrams prediction[J].Journal of Materials Processing Technology,20033(3):714-724. |
| [14] | Antonio F. Avila;Evanio L. S. Vieira.Proposing a better forming limit diagram prediction: a comparative study[J].Journal of Materials Processing Technology,20031(1):101-108. |
| [15] | I. Ulacia;N.V. Dudamell;F. Galvez.Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates[J].Acta materialia,20108(8):2988-2998. |
| [16] | M. S. Mohebbi;A. Akbarzadeh.Prediction of formability of tailor welded blanks by modification of MK model[J].International Journal of Mechanical Sciences,20121(1):44-51. |
| [17] | 曹晓卿;刘毅;王敬伟;池成忠;李黎忱;王红霞.AZ31镁合金薄板在热态下的成形极限图及其应用[J].稀有金属材料与工程,2013(3):550-554. |
| [18] | 马高山;万敏;吴向东.基于M-K模型的铝锂合金热态下成形极限预测[J].中国有色金属学报,2008(6):980-984. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%