研究目的
Investigating the use of a vanadium interlayer in laser additive manufacturing to prepare Ti-6Al-4V (TC4) / Ti-48Al-2Cr-2Nb (TiAl) bimetallic structures (BS) to limit the formation of brittle phases and improve mechanical properties.
研究成果
The V interlayer effectively reduces the formation of brittle phases in TC4/TiAl BS prepared by LAM, leading to improved tensile strength and elongation. The metallurgical bonds at the interfaces and the mechanical properties suggest that V is an ideal interlayer for such applications.
研究不足
The study focuses on the room temperature properties and does not extensively explore high-temperature performance or long-term durability of the bimetallic structure.
1：Experimental Design and Method Selection:
Laser additive manufacturing (LAM) technology was used to prepare TC4/TiAl BS with a V interlayer to limit brittle phase formation.
2：Sample Selection and Data Sources:
TC4 and TiAl alloy powders were used, with particle sizes of 53–150 μm.
3：List of Experimental Equipment and Materials:
LDM8060 system by RAYCHAM, LDF-4000 fibre-coupled diode laser, TC4 and TiAl alloy powders.
4：Experimental Procedures and Operational Workflow:
The LAM experiment was conducted in an oxygen level lower than 50 ppm, with specific laser power, scan speed, and powder feed rate parameters.
5：Data Analysis Methods:
Microstructure was characterized by SEM and EBSD, and mechanical properties were evaluated using a universal electronic tester.
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