【作者】 汤韬； 邹天下； 李大永； 彭颖红；

【Author】 Tang Tao;Zou Tian-xia;Li Da-yong;Peng Ying-hong;Shanghai Jiaotong University;

【机构】 上海交通大学；

【摘要】 本文建立了基于材料流动的解析建模方法,计算了圆棒挤压不同变形位置的应变历程。在此基础上,结合再结晶晶体塑性有限元的方法,对材料不同变形区域织构进行了数值模拟与试验验证,对挤压过程不均匀性进行了评估。研究表明中心变形区域材料在(0001)极图中呈现特征的环状基面织构,而边缘变形区域材料由于剪切应变的作用,呈现向挤压轴偏转的倾斜环状基面织构。更多还原

【Abstract】 In this paper, a parametric flow line model is established to calculate the variation of strain path in a round extrusion process. The polycrystal plasticity method coupled with the dynamic recrystallization model is introduced to analyze the texture and microstructure evolution. The simulation results show good agreement with the experimental ones. The central extrusion area shows a typical ring fiber texture in the(0001) pole figure, while the the basal poles of the material deformed in the side areas tend to rotate backward to the extrusion direction, resulting from the shear strain components in the strain path.更多还原