Lomaev Stepan L, Fattalova Dinara R, Gordeev Georgii A, Timirgazin Marat A, Krivilyov Mikhail D
Udmurt Federal Research Center of the Ural Branch of RAS, Baramzina str. 34, Izhevsk, 426067, Russia.
Udmurt State University, Universitetskaya str. 1, Izhevsk, 426034, Russia.
Sci Rep. 2025 Jan 13;15(1):1887. doi: 10.1038/s41598-025-85487-0.
Ultrasound can improve the quality of finished products by reducing porosity and enhancing microstructure in selective laser melting, directed energy deposition, and laser beam welding. This study evaluates the efficiency of ultrasound produced by a pulsed laser via the optoacoustic effect. A quantitative model of collapse of vapor-gas bubbles has been developed under the conditions of ultrasonic treatment at near resonance frequencies. Based on the simulation results, the phenomenological expressions are suggested to determine the optimal operating frequency and power for the pulsed laser to alter the microstructure and porosity effectively via cavitation. The analysis is performed for the 316 L stainless steel and titanium Ti-6Al-4 V alloy, which are common in additive manufacturing.
在选择性激光熔化、定向能量沉积和激光束焊接中，超声波可通过减少孔隙率和改善微观结构来提高成品质量。本研究通过光声效应评估脉冲激光产生超声波的效率。在近共振频率的超声处理条件下，建立了汽-气气泡坍塌的定量模型。基于模拟结果，提出了现象学表达式，以确定脉冲激光通过空化有效地改变微观结构和孔隙率的最佳工作频率和功率。对增材制造中常用的316L不锈钢和钛Ti-6Al-4V合金进行了分析。
