2319铝合金电弧增材制造温度场与应力演变研究

doi:10.11896/cldb.22060214

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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.

Key words： WAAM thermal elastic plastic model residual stress aluminum alloy

Published: 10 December 2023 Online: 2023-12-08

CLC number:

TH164

Fund:National Natural Science Foundation Youth of China (52205432), Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (BK20221118), Natural Science Foundation of Shandong Province, China (ZR2023QE232), China Postdoctoral Science Foundation(2022M723375).

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	Articles by authors
	GENG Ruwei
	CHENG Yanhai
	DU Jun
	WEI Zhengying

Cite this article:

GENG Ruwei,CHENG Yanhai,DU Jun, et al. Research on Temperature Field and Stress Evolution of 2319 Aluminum Alloy in Wire and Arc Additive Manufacturing[J]. Materials Reports, 2023, 37(23): 22060214-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22060214 OR http://www.mater-rep.com/EN/Y2023/V37/I23/22060214

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