Integrated Modelling of Microstructure and Mechanical Property in Friction Stir Additive Manufacturing
ZHANG Zhao1, TAN Zhijun1, LI Jianyu1, ZU Yufei2
1. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China;
2. School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116024, China
As a new solid state additive manufacturing technology, friction stir additive manufacturing is developed based on friction stir welding. For the re-stirring and re-heating phenomena in friction stir additive manufacturing, both experimental and numerical methods are used for analysis. Monte Carlo method is used to calculate the microstructural evolutions. The precipitate distributions are calculated by the developed precipitate evolution model. The hardness distributions on different additive manufactured layers are then calculated. Experimental data is compared to show the validities of the numerical models. Results indicate that different grain sizes and morphologies can be found due to the existences of restirring and re-heating. The variations of particle numbers and mean radii of precipitates on different layers, caused by different temperature histories, can lead to the different mechanical properties. The mechanism for the generation of different mechanical properties in different layers are explained by numerical simulations in combination with experimental validation.
基金资助:国家自然科学基金(11572074)。
作者简介: 张昭:教授、博士、博士生导师,研究方向为制造工艺力学,发表研究论文100余篇。
引用本文:
张昭,谭治军,李健宇,祖宇飞. 搅拌摩擦增材制造的微观结构-力学性能一体化数值模拟[J]. 航空制造技术, 2019, 62(1/2): 14-18.
ZHANG Zhao, TAN Zhijun, LI Jianyu, ZU Yufei. Integrated Modelling of Microstructure and Mechanical Property in Friction Stir Additive Manufacturing. Aeronautical Manufacturing Technology, 2019, 62(1/2): 14-18.