摘要
通过有限元仿真分析、电子背散射衍射和显微硬度实验,分别从宏微观层面探究了辊弯成形工艺对6061-T6铝合金板材微观组织及力学性能的影响。首先,建立了6061-T6铝合金辊弯成形过程的有限元仿真模型,通过实验与仿真相结合的方式分析了辊弯成形过程的应力、应变变化,确定了弯角区内外边缘的不同力学响应,并验证了仿真模型的有效性,为后续微观组织分析明确了表征位置。宏观分析结果表明:6061-T6铝合金的回弹角度与目标成形角度呈正相关,且经辊弯成形后,成形区域的硬度得到明显提升。微观分析结果显示:随着成形角度的增加,材料内外边缘晶粒得到明显细化,并呈现出织构类型从随机转变为逐渐一致的趋势,最终由锋锐的Cube织构和较强的{111}<112>织构组成。
The influences of roll forming process on the microstructure and mechanical properties of 6061-T6 aluminum alloy sheets were investigated by finite element simulation analysis,electron back scatter diffraction(EBSD)and microhardness experiments.Firstly,a fi-nite element simulation model for the roll forming process of 6061-T6 aluminum alloy was established,and the stress and strain changes during the roll forming process were analyzed by combining experiments with simulations to determine the different mechanical responses at the inner and outer edges of bending corner area,and the effectiveness of the simulation model was verified,which clarified the character-ization position for the subsequent microstructure analysis.The macroscopic analysis results show that the springback angle of 6061-T6 aluminum alloy is positively correlated with the target forming angle,and the hardness of he forming area is significantly improved after roll forming.The microscopic analysis results show that with the increasing of forming angle,the grains at the inner and outer edges of the ma-terial are significantly refined,and the texture type shows a trend of changing from random to gradually consistent,and finally consists of sharp Cube texture and strong{111}<112>texture.
作者
刘山川
韩飞
Liu Shanchuan;Han Fei(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)
出处
《锻压技术》
北大核心
2025年第6期48-57,共10页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51074204)
北京市自然科学基金-市教委联合项目(KZ201910009011)
北京市属高校高水平教师队伍建设长城学者培养计划(TCD20190306)
北京市教委基本科研项目(110052972027/024)。
关键词
辊弯成形
6061铝合金
微观组织
力学性能
织构
roll forming
6061 aluminum alloy
microstructure
mechanical properties
texture
