多晶铝轧制变形的织构演变 Ⅱ．理论模拟  

TEXTURE EVOLUTION OF POLYCRYSTALLINE ALUMINUM DURING ROLLING DEFORMATION Ⅱ.Theoretical Simulation

作　　者：陈志永[1] 才鸿年[2] 常亚喆[1,3] 张新明[1] 刘楚明[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]北京理工大学材料科学与工程学院,北京100081 [3]中国空空导弹研究院,洛阳471009

出　　处：《金属学报》2008年第11期1322-1331,共10页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50301016;湖南省自然科学基金项目03JJY5020资助~~

摘　　要：采用Talylor类型多晶体塑性变形模型,模拟了初始自由分布和近似立方织构多晶铝的轧制织构演变.应用取向线分析方法将不同模型的理论计算结果进行了系统分析,并与实测轧制织构进行了比较.结果表明:在低轧制变形程度时,完全限制(FC)模型计算结果的取向分布较其它模型更符合实际结果.在较高程度轧制变形时,对于初始自由分布的多晶铝轧制试样,lath模型与实验符合较好;而对于初始具有近似立方织构的样品,使用混合模型结果较佳.The rolling texture evolutions with initial randomly distributed texture and nearly cube texture are simulated by Taylor-type deformation models.A systematic comparison of the theo- retical results obtained by the different models against the experimental rolling textures is performed by orientation line analysis.The results show that the orientation distribution calculated by the FC （full constraints）Taylor model is closer to experimental results than those by other models at the low rolling deformation degree.During the higher deformation degrees,the results obtained by the lath model agree the measured ones better for the initial randomly distributed texture,while the simulated results obtained by the mixed model are closer to the measured ones than those by the other models for initial cube texture.

关 键 词：多晶铝 轧制变形 初始织构 自由分布 Taylor模型 

分 类 号：TG146[一般工业技术—材料科学与工程] TG111[金属学及工艺—金属材料]