CAJ | 학술논문

利用MSC.Marc的热力耦合弹塑性有限元模拟技术,建立了GH4169环形件惯性摩擦焊接过程的二维热力耦合有限元模型.考虑到惯性摩擦焊接过程中的温度变化,采用叠加原理对Na YS建立的GH4169动态再结晶数学模型进行调整.借助MSc.Marc二次开发,将动态再结晶数学模型和有限元模型相结合,对惯性摩擦焊接过程中GH4169合金的动态再结晶组织演化进行数值模拟,得到了焊接过程中的动态再结晶分数和平均晶粒尺寸分布.对接头的宏观形貌和焊缝区的微观组织进行观察分析,发现模拟结果与实验结果吻合较好.
이용MSC.Marc적열력우합탄소성유한원모의기술,건립료GH4169배형건관성마찰한접과정적이유열력우합유한원모형.고필도관성마찰한접과정중적온도변화,채용첩가원리대Na YS건립적GH4169동태재결정수학모형진행조정.차조MSc.Marc이차개발,장동태재결정수학모형화유한원모형상결합,대관성마찰한접과정중GH4169합금적동태재결정조직연화진행수치모의,득도료한접과정중적동태재결정분수화평균정립척촌분포.대접두적굉관형모화한봉구적미관조직진행관찰분석,발현모의결과여실험결과문합교호.
Using the coupled thermo-mechanical FEM technology of software MSC. Marc, a 2D thermo-mechanical coupled finite dement model for inertia friction welding process of GH4169 super-alloy ring parts was developed. Take into account of the non-isothermal condition during the inertia friction welding, the additivity rule was introduced to adapted the mathematical model for dynamic recrystallization of GH4169 established by Na Y S. By second-development of MSC. Marc, the mathematical model for dynamic recrystallization was combined with the finite model to simulate the microstructure evolution for dynamic recrystallization of GH4169 during the inertia friction welding process. The distributions of dynamic recrystallized fraction and average grain size during the welding process were obtained. The macrostructure of the friction welded joint and the microstructure of welding area was examined and analyzed, it was found that the simulation results agree well with the experimental results.