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对平行于板面方向(RD)、成45°方向和垂直于板面方向(TD)成型的AZ31合金板材的金相组织和常温力学性能进行了分析,并基于SVM模型得到了AZ31合金板材的成型极限图。结果表明,随着成型方向从TD方向转向RD方向的过程中,AZ31合金板材中的挛晶数量有逐渐降低的趋势;沿着RD方向成型的板材在RD方向的n值最大,45°方向的r值最小;沿着TD方向成型的板材,在取样方向从TD转向RD过程中,n值逐渐降低,在TD方向取得r最小值;沿着45°方向成型的板材,在取样方向为45°方向时取得n的最小值和r最大值。SVM模型可以较好地预测AZ31合金板材在拉伸状态下的成型极限。
The microstructure and mechanical properties at room temperature of AZ31 alloy sheet, which is formed parallel to the surface direction (RD), 45 ° direction and perpendicular to the surface direction (TD), were analyzed. Based on the SVM model, the AZ31 alloy sheet Forming limit chart. The results show that the number of twins in the AZ31 alloy sheet gradually decreases with the forming direction from the TD to the RD. The n value in the RD direction of the sheet formed along the RD direction is the largest. The value of 45 ° in the direction of 45 ° the value of r is the smallest; in the TD direction forming plate, the sample direction from TD to RD process, the value of n gradually decreased in the TD direction to obtain the r minimum; along the direction of 45 ° forming plate, the sampling direction of 45 ° Obtain the minimum value of n and rmax in direction. The SVM model can predict the forming limit of AZ31 alloy sheet under tensile condition.