An Elasticity Model Considering Grain Boundaries and Tensile Orientations for Directionally Solidified Superalloys

作     者：XIAO Jianfeng ZHANG Hongjian WEN Weidong CUI Haitao 

作者机构：Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information TechnologyJiangsu Province Key Laboratory of Aerospace Power SystemState Key Laboratory of Mechanics and Control of Mechanical StructuresCollege of Energy & Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China 

出 版 物：《Transactions of Nanjing University of Aeronautics and Astronautics》 (南京航空航天大学学报（英文版）)

年 卷 期：2019年第36卷第4期

页      面：652-662页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China (No.51205190) the Fundamental Research Funds for the Central Universities (No.NS2016026) the Aeronautical Power Science Fund Project (No. 6141B090317) the Innovation Fund of Jiangsu Province, China (No.KYLX-0304) 

主　　题：directionally solidified superalloys single crystal Young’s modulus grain boundaries 

摘      要：In order to investigate the elastic properties of directionally solidified(DS)superalloys,an elasticity model called boundaries elastic model(GBE model),considering grain boundaries and tensile orientations,is proposed in this *** assumptions are adopted in the GBE model:(1)The displacement of grains,which moves along the perpendicular direction,is restricted by the grain boundaries;(2)Grain boundaries influence region(GBIR)is formed around the grain *** on the single crystal(SC)calculation method of elastic properties,the GBE model can well predict macroscopic equivalent elastic modulus(Young’s modulus)of DS superalloys under different tensile orientations *** demonstrate the correctness of the GBE model,3D finite element simulation is adopted and tensile experiments on a Ni3Al?base DS superalloy(IC10)along five tensile orientations are carried ***,the grain boundaries are observed by light microscopy and transmission electron microscope(TEM).Therefore,the GBE model is proved to be feasible by comparing the simulated results with the experiments.