GH4169合金热变形微观组织演变模型  

Microstructure model of GH4169 alloy during hot forming

作　　者：李志强[1,2] 张宁[2,1] 王宝雨[1] 侯红亮[2] 胡正寰[1] 

机构地区：[1]北京科技大学,北京100083 [2]北京航空制造工程研究所,北京100024

出　　处：《塑性工程学报》2014年第5期100-104,共5页Journal of Plasticity Engineering

摘　　要：基于等效位错密度建立GH4169高温合金的本构方程及微观组织演变模型,通过遗传算法结合热模拟压缩实验结果对模型参数进行求解;对有限元模拟软件DEFORM-3D进行二次开发,模拟工件的镦粗成形,得到了工件平均晶粒尺寸和再结晶百分数的分布情况,并与实验结果进行了对比分析。结果表明,二次开发的软件对微观组织演变的模拟结果与实验结果的平均误差在10%左右,验证了GH4169合金本构方程和微观组织演变模型的准确性,以及对软件二次开发的可行性。The dislocation density-based constitutive equation and microstructural evolution model of GH 4169 alloy were estab-lished .Through the genetic algorithm and the isothermal compression test data ,the parameters of model were calculated .Based on the secondary development of DEFORM-3D ,the upsetting was simulated and the distribution of average grain size and recrystal-lized volume fraction were obtained and compared with the experimental results .The results show that the average error between the microstructural simulation and the experimental research was within 10% ,which verified that the dislocation density-based constitutive equation and microstructural evolution model of GH 4169 alloy are accurate and the secondary development is feasible .

关 键 词：GH4169合金 微观组织模型 位错密度 二次开发 

分 类 号：TG146.41[一般工业技术—材料科学与工程]