Transactions of Materials and Heat Treatment

Title：Forming limit diagram prediction of magnesium alloy sheet at warm condition

Authors： ZHANG Xiao-long CAO Xiao-qing YANG Lin FAN Qi SHEN Lu-lu

Unit： Taiyuan University of Technology

KeyWords： forming limit diagram magnesium alloy sheet theoretical prediction yield criterion

ClassificationCode：TG386

year,vol(issue):pagenumber：2013,38(4):131-134

Abstract：

A prediction of the right-hand side of forming limit diagram (FLD) of AZ31 magnesium alloy sheet at warm condition was carried out based on M-K model. The predicted results of FLD were calculated using the algorithm presented by Graf and Hosford. Backoften constitutive equation and two different yield criteria (von Mises yield criterion and Hill48 yield criterion) were applied in the theoretical calculation. The effects of the value of R (normal plastic anisotropic ratio) on the shape of the predicted FLD were studied, and it is shown that the forming limit strain decreases with the rise of R-value. The predicted results were compared against the experimental data to verify its correctness and accuracy. It is indicated that for the AZ31 magnesium alloy, the predicted results based on von Mises yield criterion make a better agreement with experimental data in the right-hand side of FLD.

Funds：

山西省自然科学基金资助项目(2010011033-1);山西省回国留学人员科研资助项目(2008029);山西省教育厅高校科技研究开发项目(2007110);太原理工大学科研资助项目（2009）

张小龙（1988-），男，硕士研究生；通讯作者：曹晓卿

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