基于晶体塑性的DD6单晶合金力学性能及织构演化  

Properties and Texture Evolution of DD6 Single Crystal Alloy Based on CPFEM

作　　者：赵宏伟 杨贤樑 张嵩 尤孟春 刘二强 ZHAO Hongwei;YANG Xianliang;ZHANG Song;YOU Mengchun;LIU Erqiang(College of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024;Jingwei Textile Machinery Company Limited,Jinzhong 110819)

机构地区：[1]太原科技大学应用科学学院,太原030024 [2]经纬智能纺织机械有限公司,晋中110819

出　　处：《特种铸造及有色合金》2024年第10期1382-1387,共6页Special Casting & Nonferrous Alloys

基　　金：山西省自然科学基金资助项目(202203021221159)。

摘　　要：采用晶体塑性有限元方法(CPFEM)对DD6镍基单晶合金高温力学性能进行了研究。结果表明,一定加载速率下,不同取向单晶合金(223)[11-0]取向的屈服应力和弹性模量最大;不同取向滑移系的激活程度不同,其最大累积剪切应变数值也不同,材料不同取向的晶粒均发生了旋转,而(001)[11-0]取向的偏转角度最大。相同取向条件下,应变速率对弹性模量影响很小,而屈服应力与应变速率呈正相关。The crystal plasticity finite element method(CPFEM)was employed to investigate mechanical properties of DD6 single crystal alloy under high temperature conditions.The results indicate that under certain loading rates,the(223)[11-0]orientation exhibits the highest yield stress and elastic modulus among different orientations.The activation levels of different slip systems also vary for different orientations,resulting in different values of maximum accumulated shear strain.Grains with all orientations suffer grain rotation,where the(001)[11-0]orientation exhibits the largest deviation angle.Under the constant orientation condition,strain rate has little influence on the elastic modulus,while the yield stress shows a positive correlation with strain rate.

关 键 词：镍基单晶合金 晶体塑性 屈服应力 织构演化 

分 类 号：O331[理学—一般力学与力学基础] TG146.15[理学—力学]