摘要
为了使本构关系能体现热态塑性成形过程中变形-传热-组织演化之间的复杂交互作用,作者提出了一种根据显微组织演化建立材料本构关系的方法。以这种本构关系为媒介,作者进一步提出了一种热态塑性成形过程的有限元变形-传热-组织演化耦合分析方法,并建立了软件系统DHTMECA。应用DHTMECA对GH4169合金涡轮盘在液压机上锻造过程进行了变形-传热-组织演化耦合分析。计算结果表明,DHTMECA不仅可以揭示热态塑性成形过程中坯料的形状和尺寸以及坯料内热力参数的演化规律,而且能够提供热态塑性成形过程中坯料内动态再结晶过程的细节,从而在过程仿真方面为实现锻造过程最优控制和锻件组织最优化奠定基础。而这些功能是DE-FORM,AUTOFORGE,SUPERFORGE等商业有限元软件所不具备的。
A method for establishing the constitutive relationship based on microstructural evolution has been put forward by authors in order for the constitutive relationship to embody complicated interaction among deformation, heat transfer, and microstructural evolution （DHTME） during hot forming process. Using this kind of constitutive relationship as media, a method for DHTME coupling analysis was formulated and software called DHTMECA was developed according to the proposed method. DHTMECA was employed to simulate the forging process of GH4169 alloy disk on hydraulic press. The simulating results indicate that DHTMECA not only can reveal the change in shape and dimension of billet with time and evolution of thermomechanical parameters during hot forming process, but also can provide the details of dynamic recrystallization process within the billet, laying the foundation for optimal control of forging process and optimization of microstructure development from the aspect of process modeling. The commercial FEM codes, such as DEFORM, AUTOFORGE, SUPERFORGE do not have the above functions.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2006年第1期62-66,共5页
Journal of Plasticity Engineering
基金
航空科学基金资助项目(02H53062)
关键词
有限元方法
变形-传热-组织演化耦合分析
GH4169合金
finite element methods deformation-heat transfer- microstrutural evolution coupling analysis
GH4169 alloy
