| CAI Jin,Kiplagat，Collins Cherutich,LI Wei,SHI Jun-dong,LIN Shuang.Surface Roughness Numerical and Test Evaluation of FGH97 Powder Superalloy by Ultrasonic Shot Peening[J],50(6):250-257 |
| Surface Roughness Numerical and Test Evaluation of FGH97 Powder Superalloy by Ultrasonic Shot Peening |
| Received:May 23, 2020 Revised:September 07, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.06.028 |
| KeyWord:ultrasonic shot peening high temperature powder nickel-based alloy roughness finite element relative standard deviation |
| Author | Institution |
| CAI Jin |
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang , China |
| Kiplagat，Collins Cherutich |
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang , China |
| LI Wei |
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang , China |
| SHI Jun-dong |
AECC Shenyang Engine Research Institute, Shenyang , China |
| LIN Shuang |
AECC Shenyang Engine Research Institute, Shenyang , China |
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| Abstract: |
| In order to explore the influence of ultrasonic shot peening on the surface roughness of FGH97 powder nickel-based alloy, and verify the feasibility of the finite element roughness prediction model of ultrasonic shot peening, characterization test and numerical simulation analysis are carried out under the shot peening intensities of 0.13 A and 0.18 A, respectively. The roughness variation of FGH97 powder nickel-based alloy after ultrasonic shot peening is studied, and the three-dimensional ultrasonic shot peening finite element model (chamber geometric model, batch spheres model, vibration system, Johnson-Cook material constitutive model) is established. Under the two shot peening intensities, the number of measurement of Ra and Rz test values along the horizon and vertical directions of the sample are 25, respectively, and the relative standard deviation of the average value of the horizon and vertical roughness of the sample are calculated. The results show that the mean Ra and Rz values of the overall roughness are 0.96 μm and 4.25 μm, respectively. Based on the numerical simulation prediction analysis of 0.18 A ultrasonic peening process parameters, it is obtained that the average values of the horizon and vertical roughness Ra and Rz are 1.02 μm and 4.3 μm, respectively. The difference between the horizon and vertical roughness values and the final evaluation value of the test data is less than 10%, which confirms the validity of FGH97 powder nickel-based alloy ultrasonic shot peening numerical simulation prediction, and it is concluded that the number of 10 extreme sampling measurements can more accurately reflect the surface roughness of the sample after ultrasonic shot peening. The increase in shot peening intensity reduces the dispersion of the distribution of the roughness value. At the same time, the difference in relative standard deviation proves that the measurement and analysis of the pretreatment state of the sample before ultrasonic shot peening is necessary. |
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