In the fields of aerospace and biomedical sciences,TC4 titanium alloy is highly favored for its excellent mechanical properties and biocompatibility. However, its high melting point and low thermal conductivity make it difficult to prepare complex structures through traditional processing. In recent years, laser powder bed melting (LPBF) technology has brought breakthroughs to TC4 molding, but how to accurately control energy density to optimize material properties remains a key focus of industry research. Shenyang workerskarmaThe Great LearningZhang KaiProfessor's team, in《Significant achievements were published in the Journal of Manufacturing Processes, utilizing the Aolong AL-Y3500modelThe X-ray diffractometer (XRD) revealed the influence mechanism of energy density on the phase composition, microstructure, and macroscopic properties of TC4 alloy, providing a key technical path for LPBF process optimization.

X-ray diffractometerUnlocking the Composition and Structural Evolution of Phases Microscope.In During the LPBF process, the energy density determines the phase transition and crystal growth of TC4 alloy by influencing the dynamic behavior of the melt pool and cooling rate.Professor Zhang KaiThe team utilizes Aolong AL-Y3500typeX-ray diffractometerHigh precision phase composition analysis was conducted on samples with different energy densities, which has become a breakthrough The core tool of the "energy structure performance" relationship. A complete research chain of "energy density phase composition microstructure macroscopic properties" has been established, promoting the LPBF process of TC4 alloy from "experience trial and error" to "scientific design".

pass XRD analysis, combined with indicators such as relative density and surface roughness, divides the energy density into unfused zone, spheroidized zone, well formed zone, splattered zone, and over melted zone. For example, in the well formed area (55.56 J/mm ³), XRD showed that the concentration of alpha/alpha 'phase reached the optimal balance with the distribution of nano beta phase particles, corresponding to a tensile strength of 1087.5 MPa and an elongation of 13.73%, far exceeding the national standard, verifying the rationality of the process parameters in this area.

The progress of domestic instruments has provided strong support for scientific research, "said Zhang Kai教授express,“AolongThe high sensitivity and stability of AL-Y3500 XRD enable us to capture subtle changes in phase composition, which is crucial for exploring complex phase transitions in additive manufacturing. ”The team's research not only enriches the theoretical system of LPBF technology, but also promotes the deep application of domestic instruments in material research.

Scientific research cannot do without the support of advanced instruments, and the deep integration of industry, academia, and research is accelerating its promotion Chinese instruments are stepping onto the world stage. In the future, with the continuous development of additive manufacturing technology,Professor Zhang KaiThe team will continue to delve into fields such as energy density regulation and microstructure design, providing more opportunities for the preparation of key materials in aerospace, biomedical and other fields The 'China Plan'.