研究目的
Investigating the effects of laser ultrafine-nano technology on the atomic structure revolution and performance improvement of composites.
研究成果
The study demonstrated that CNTs/UNs modified LMD composites exhibit better corrosion and high-temperature oxidation resistance than TA2 alloy. The formation of UNs and their transition effects contribute to the improvement of microstructure and properties, providing a theoretical and experimental basis for upgrading the quality of industrial light alloys.
研究不足
The study focuses on the specific combination of materials and laser parameters used, which may limit the generalizability of the findings to other materials or processing conditions. The high cost and complexity of LMD technology may also limit its widespread industrial application.
1：Experimental Design and Method Selection:
The study involved the fabrication of CNTs reinforced HEACs on a TA2 titanium alloy using LMD of mixed powders. The methodology included the use of laser beam to induce the formation of UNs and their effects on the microstructure and properties of the composites.
2：Sample Selection and Data Sources:
The TA2 titanium alloy was used as the substrate, with pre-melting powders of FeCoCrAlCu, nano-SiB6, and Ni/Ag-coated CNTs mixed and deposited on the substrate.
3：List of Experimental Equipment and Materials:
Equipment included the TLF1500 TURBO laser materials processing system, SEM (JSM-6700F), HRTEM, EBSD system, XRD equipment, and DTA test equipment. Materials included TA2 titanium alloy, FeCoCrAlCu powder, nano-SiB6, and Ni/Ag-coated CNTs.
4：Experimental Procedures and Operational Workflow:
The LMD process was carried out with specific parameters including laser power, scanning speed, powder feeding rate, and laser beam diameter. The microstructure and properties of the produced composites were then analyzed.
5：Data Analysis Methods:
The microstructure was observed with SEM and HRTEM, phase constitution was identified by XRD, and corrosion and oxidation resistance were tested.
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