Evaluation of residual stress from ultrasonic cavitation peening using cavitation pit analysis and FEA

• Published in: International journal of mechanical sciences 2021-05, Vol.198, p.106352, Article 106352
• Main Authors: Lim, Youngbin, Murugesan, Prabhu, Jung, Sunghwan, Lee, Hyungyil
• Format: Article
• Language: English
• Subjects: Cavitation pit; Finite element method; Peening; Residual stress; Ultrasonic cavitation
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2021.106352

•Residual stress development by ultrasonic cavitation peening was simulated.•Impact loads were constructed by using surface profiles of pit and inverse FE method.•Impacts with top 5 % in magnitude were found to be mainly responsible for residual stress formation.•FE solutions for residual stress distributions show good agreement with the experimental data. A novel procedure to simulate ultrasonic cavitation peening is introduced. The surface profile of pits formed by ultrasonic cavitation peening are measured with atomic force microscopy, and impact loads are inversely constructed from the profiles using an inverse finite element (FE) method. The residual stress by ultrasonic cavitation peening was evaluated by analyzing 3D FE simulation results where the impact loads are applied in a random sequence. From the simulation, it was found that only the high energy impacts are mainly responsible for the residual stress. Also, the experimental results show that the present simulation based on the pit profile adequately predicts growth of the residual stress field with increasing peening time. [Display omitted]