CAJ | 학술논문

基于等效位错密度建立G H4169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G H4169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。
기우등효위착밀도건립G H4169고온합금적본구방정급미관조직연변모형，통과유전산법결합열모의압축실험결과대모형삼수진행구해；대유한원모의연건DEFORM-3D진행이차개발，모의공건적대조성형，득도료공건평균정립척촌화재결정백분수적분포정황，병여실험결과진행료대비분석。결과표명，이차개발적연건대미관조직연변적모의결과여실험결과적평균오차재10％좌우，험증료G H4169합금본구방정화미관조직연변모형적준학성，이급대연건이차개발적가행성。
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 .