Wire arc additive manufacturing of thin and thick walls made of duplex stainless steel

卷:127

Article

关键词: CORROSION-RESISTANCE;    MECHANICAL-PROPERTIES;    FERRITE CONTENT;    SHIELDING GAS;    MICROSTRUCTURE;    WELDABILITY;    COMPONENTS;    NITROGEN;    JOINT;   

DOI  :  10.1007/s00170-023-11560-5

来源: SCIE

【 摘 要 】

Wire arc additive manufacturing (WAAM) direct energy deposition is used to process two different duplex stainless steels (DSS) wire chemistries. Macro- and micromechanical response variables relevant to industrialization are studied using a design of the experiment (DoE) approach. The tested operation window shows that the variation of layer height and over-thickness are highly correlated with travel speed and wire feed speed and positively correlated with heat input. The maximum achieved average instantaneous deposition rate is 3.54 kg/h. The use of wire G2205, which contains 5 wt% nickel content, results in a ferrite-to-austenite ratio that is equally balanced, while wire G2209, with 9 wt% nickel, provides a lower ferrite content. The spatial distribution of Fe% is influenced by part geometry and path planning, and higher heat inputs result in coarser microstructures. The manufacturing weaving strategy generates a heterogeneous microstructure characterized by fluctuations in Fe%. Thus, understanding the effect of complex thermal history, higher-dimensional design spaces, and uncertainty quantification is required to drive metal WAAM toward full industrialization.

【 授权许可】

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