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为提高激光沉积TA15钛合金力学性能,采用ANSYS有限元动力学分析中的谐响应分析,对超声场下激光沉积修复梯形槽底部表面振幅分布及质点振动情况进行了数值模拟,并对模拟结果进行了实验验证,最后对超声场下激光沉积修复试样的综合力学性能进行了实验研究。结果表明:超声场下梯形槽底部表面各质点呈现周期性运动特点,最大振幅在1.6μm左右,对质点振幅进行测量,与模拟结果吻合较好。进行了超声场下激光沉积实验,沉积区硬度略有提高,修复试样抗拉强度提高3.2%,屈服强度提高7.1%,超声场下显微组织进行观察发现α片层变短。
In order to improve the mechanical properties of laser-deposited TA15 titanium alloy, the harmonic response analysis in ANSYS finite element dynamic analysis was used to simulate the surface amplitude distribution and particle vibration at the bottom of trapezoidal groove by laser deposition in ultrasonic field. The simulation results The experimental verification is carried out. Finally, the experimental research on the comprehensive mechanical properties of laser deposition repaired samples under ultrasonic field is carried out. The results show that each particle on the bottom surface of trapezoidal groove exhibits periodic motion under the ultrasonic field. The maximum amplitude is about 1.6μm, and the particle amplitude is measured, which agrees well with the simulation results. The laser deposition experiment was carried out in the ultrasonic field. The hardness of the deposition zone slightly increased. The tensile strength of the repaired specimen increased by 3.2% and the yield strength increased by 7.1%. The microstructure of the specimen was observed to be shorter by ultrasonic field.