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<p>This study deals with the fabrication of a 310-grade stainless steel part by wire arc additive manufacturing and the characterization of the mechanical and metallurgical properties of the fabricated structure. With the selected fabrication parameters, a soundful part from 310 wire was produced without macro defects. Microstructure analysis, hardness measurements, and tensile tests were performed on the fabricated 310, and the test results were compared with the wrought 310. Microstructure studies showed that fabricated 310 has a large-grained dendritic columnar structure containing delta ferrite, leading to weaker mechanical properties than wrought 310. Hardness measurements revealed that fabricated 310 has about 29 HV higher hardness than wrought 310 due to the denser delta ferrite and large-grained dendritic structure of fabricated 310. The mechanical properties of the fabricated 310 structure varied with orientation and fabricated 310 showed anisotropic properties compared to wrought 310. The mean tensile strength of the produced 310 structure (517.74&#xa0;MPa), regardless of the specimen orientation, was approximately 33&#xa0;MPa lower than that of wrought 310 (550.21&#xa0;MPa). This reduction was attributed to the microstructure variation due to the changing heat input and cooling cycles in the manufacturing process.</p>

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Wire Arc Additive Manufacturing of 310 Grade Stainless Steel Part: Characterization Microstructure, Mechanical Properties and Comparison with Wrought Counterpart

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Yusuf Ayan

摘要

This study deals with the fabrication of a 310-grade stainless steel part by wire arc additive manufacturing and the characterization of the mechanical and metallurgical properties of the fabricated structure. With the selected fabrication parameters, a soundful part from 310 wire was produced without macro defects. Microstructure analysis, hardness measurements, and tensile tests were performed on the fabricated 310, and the test results were compared with the wrought 310. Microstructure studies showed that fabricated 310 has a large-grained dendritic columnar structure containing delta ferrite, leading to weaker mechanical properties than wrought 310. Hardness measurements revealed that fabricated 310 has about 29 HV higher hardness than wrought 310 due to the denser delta ferrite and large-grained dendritic structure of fabricated 310. The mechanical properties of the fabricated 310 structure varied with orientation and fabricated 310 showed anisotropic properties compared to wrought 310. The mean tensile strength of the produced 310 structure (517.74 MPa), regardless of the specimen orientation, was approximately 33 MPa lower than that of wrought 310 (550.21 MPa). This reduction was attributed to the microstructure variation due to the changing heat input and cooling cycles in the manufacturing process.