研究目的
Investigating the effectiveness of Nb/Cu multi-interlayer in preventing the formation of brittle Ti–Ni and Ti–Cu phases during the laser additive manufacturing of TA15 and Inconel 718 bimetallic structure.
研究成果
The Nb/Cu multi-interlayer effectively prevented the generation of brittle Ti–Ni and Ti–Cu phases during the laser additive manufacturing of TA15 and Inconel 718 bimetallic structure. The tensile strength of the bimetallic structure reached that of the Cu interlayer, indicating good metallurgical bonds at the interfaces.
研究不足
The study focuses on the prevention of brittle phases formation and the mechanical properties of the bimetallic structure. However, the impact of the Nb/Cu multi-interlayer on other properties such as thermal conductivity or corrosion resistance was not investigated.
1：Experimental Design and Method Selection:
Laser additive manufacturing (LAM) technology was used to fabricate the bimetallic structure with Nb/Cu multi-interlayer to prevent brittle phases formation.
2：Sample Selection and Data Sources:
TA15 Ti-alloy and Inconel 718 superalloy were selected as model materials. The powders were argon atomized with sizes ranging from 75 to 250 μm.
3：List of Experimental Equipment and Materials:
Laser solid forming system equipped with multiple powder feeders, SU8010 scanning electron microscope (SEM), energy dispersive x-ray spectroscopy (EDS), XRD7000-type diffractometer, WDW-3100 tensile testing machine.
4：Experimental Procedures and Operational Workflow:
The LAM experiment was carried out in an argon atmosphere. The substrate surfaces were polished and cleaned before LAM. The bimetallic structure was then characterized for microstructure, element distribution, and mechanical properties.
5：Data Analysis Methods:
Microstructural characterization was performed by SEM, element distribution by EDS, phase analysis by XRD, and tensile properties by tensile testing machine.
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