Research on Temperature Field and Stress Evolution of 2319 Aluminum Alloy in Wire and Arc Additive Manufacturing
GENG Ruwei1,*, CHENG Yanhai1, DU Jun2, WEI Zhengying2
1 School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China 2 State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Abstract: Athermal elastic plastic finite element method (FEM) for the wire and arc additive manufacturing (WAAM) of 2319 aluminum alloy was established. The instantaneous temperature field and the temperature gradient near fusion line were calculated, and the effects of processing parameters on the temperature field of melting pool were analyzed. The distribution rules of temperature field under different processing parameters were investigated, it was found that the increase in current and the decrease in substrate movement speed would cause the temperature gradient to increase. On the basis of temperature field calculation, the evolution and distribution rules of residual stress in WAAM were investigated by thermal elastic plastic finite element method. In the case of single-layer deposition, the longitudinal stress in the substrate was compressive stress, the inside of the deposited layer suffered tensile stress. The longitudinal stress was close to the von Mises stress in value; the maximum stress was in the middle part of the deposited layer. The stress distributions of the deposition layer under different processing parameters were investigated, and it was found that increasing the substrate moving speed could reduce the von Mises stress and longitudinal stress inside the deposition layer, while the current would increase the von Mises stress and longitudinal stress. Combined with the temperature field results, it could be found that the residual stress was positively associated with the temperature gradient in the molten pool.
通讯作者:
* 耿汝伟,中国矿业大学机电工程学院讲师、硕士研究生导师。2014年中国石油大学(华东)机械设计制造及其自动化专业本科毕业,2021年西安交通大学机械工程专业博士毕业后到中国矿业大学工作至今。目前主要从事金属增材制造工艺、组织、性能等方面的研究工作。发表论文10余篇,包括Additive Manufacturing、Journal of Manufacturing Process等。geng6294@cumt.edu.cn
引用本文:
耿汝伟, 程延海, 杜军, 魏正英. 2319铝合金电弧增材制造温度场与应力演变研究[J]. 材料导报, 2023, 37(23): 22060214-8.
GENG Ruwei, CHENG Yanhai, DU Jun, WEI Zhengying. Research on Temperature Field and Stress Evolution of 2319 Aluminum Alloy in Wire and Arc Additive Manufacturing. Materials Reports, 2023, 37(23): 22060214-8.
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2023, Vol. 37 
