Simulation Study on Temperature and Stress Fields in Mg-Gd-Y-Zn-Zr Alloy during CMT Additive Manufacturing Process.

Mingkun Zhao, Zhanyong Zhao, Wenbo Du, Peikang Bai, Zhiquan Huang

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Article in Materials (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Mingkun ZhaoSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China.

Zhanyong ZhaoSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China.ORCID 0000-0001-7798-3699

Wenbo DuNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, China.

Peikang BaiSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China.

Zhiquan HuangSchool of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030602, China.

Funding

National Natural Science Foundation of China No. 52275389，52075357Natural Science Foundation of Shanxi Province 20210302123064Patent Transformation Special Plan Project of Shanxi No. 202201004

6 · The paper itself

Abstract

A new heat source combination, consisting of a uniform body heat source and a tilted double ellipsoidal heat source, has been developed for cold metal transfer (CMT) wire-arc additive manufacturing of Mg-Gd-Y-Zn-Zr alloy. Simulations were conducted to analyze the temperature field and stress distribution during the process. The optimal combination of feeding speed and welding speed was found to be 8 m/min and 8 mm/s, respectively, resulting in the lowest thermal accumulation and residual stress. Z-axis residual stress was identified as the main component of residual stress. Electron Backscatter Diffraction (EBSD) testing showed weak texture strength, and Kernel Average Misorientation (KAM) analysis revealed that the 1st layer had the highest residual stress, while the 11th layer had higher residual stress than the 6th layer. Microhardness in the 1st, 11th, and 6th layers varies due to residual stress impacts on dislocation density. Higher residual stress increases dislocation density, raising microhardness in components. The experimental results were highly consistent with the simulated results.

Indexed as

cold metal transfercombined heat sourcemagnesium rare earthresidual stresssimulation

Identifiers

PMID38473670

DOI10.3390/ma17051199

PMCPMC10934179

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