Inconel-718微构件晶粒尺度伪随机建模与仿真  

Grain-scale Pseudorandom Modelling and Simulation for Inconel-718 Miniature Parts

作　　者：冀寒松 宋清华[1,2] 杜宜聪 刘战强[1,2] JI Hansong;SONG Qinghua;DU Yicong;LIU Zhanqiang(School of Mechanical Engineering,Shandong University,Jinan 250061;Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education),Shandong University,Jinan 250061)

机构地区：[1]山东大学机械工程学院,济南250061 [2]山东大学高效清洁机械制造教育部重点实验室,济南250061

出　　处：《机械工程学报》2023年第17期232-240,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51875320,51922066);山东省自然科学基金(ZR2019JQ19)资助项目。

摘　　要：现有的晶体材料微构件晶粒尺度力学行为仿真模型未充分考虑材料的晶粒尺度微结构信息,且忽略了零件外形和微结构之间的关联关系,导致仿真精度低、难以推广。面向航空航天领域微小型化发展趋势,针对热端关重件常用的多晶材料Inconel-718,开展了其微构件的晶粒尺度伪随机建模与仿真研究。获取了Inconel-718的真实三维晶粒尺度微结构统计信息,介绍了所开发的考虑几何要素的多晶材料微构件三维伪随机晶粒尺度建模方法。以Inconel-718微柱压缩、微折弯以及微齿轮旋转作为多晶材料微测试、微制造以及微小零件服役仿真案例,强调了在晶粒尺度仿真中考虑构件几何要素的必要性,并展示了所开发建模方法的应用前景。所开发多晶材料微构件晶粒尺度伪随机建模方法可直接实现任意外形Inconel-718微构件的高效准确晶粒尺度建模和力学行为模拟,且便于推广至其他晶体材料的应用中。The grain-scale microstructure information of crystalline material is failed to be comprehensively considered in existing grain-scale mechanical behaviour simulation models of crystalline material miniature parts,and the incidence relation between part geometry and microstructure is neglected,which make the models low accuracy and difficult to be popularized.According to the microminiaturization tendency in the aerospace field,grain-scale pseudorandom modelling and simulations of Inconel-718,a conventionally used polycrystalline material for critical parts in high temperature applications,are carried out.The actual 3D microstructure statistical information of Inconel-718 is obtained,and the geometry-considered 3D pseudorandom grain-scale modelling method is introduced.Micro-pillar compression,micro bending and micro-gear rotation simulations are executed as the cases of micro-testing,micro-manufacturing and miniature-part serving.The necessity of considering geometrical features of crystalline material miniature parts during grain-scale simulations is emphasized,and the application prospect of the developed method is demonstrated.The developed grain-scale pseudorandom modelling method for polycrystalline material miniature parts is able to directly achieve grain-scale modelling and mechanical behavior simulation of arbitrary-shaped Inconel-718 miniature parts with high efficiency and accuracy,and it is also convenient to be extended to the application of other crystalline materials.

关 键 词：Inconel-718 微构件 伪随机 晶体塑性有限元分析 

分 类 号：TG113[金属学及工艺—物理冶金]