A CFD-FEM numerical study on shot peening

Lin, Qinjie; Wei, Peitang; Liu, Huaiju; Zhu, JiaZan; Zhu, Caichao; Wu, Jizhan

doi:10.1016/j.ijmecsci.2022.107259

Cited by 35 publications

(13 citation statements)

References 40 publications

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“…The ball diameter, ball impact velocity and impact angle are three essential parameters that can affect the strengthening performance [ 14 ], and by considering the ability of the commercial shot peening machine in addition to previous studies in the shot peening of high manganese steel [ 27 ], in simulation, single balls with diameters ( d p ) of 0.2 mm, 0.4 mm and 0.6 mm are employed; three levels of ball impact velocity ( v p ), i.e., 40 m/s, 60 m/s and 80 m/s, are selected. Moreover, the ball impact angle could affect the formation of the plastic zone on the target surface; as such, three levels of ball impact angle ( α p ), i.e., 30°, 60° and 90°, are also considered in the simulation.…”

Section: Numerical Workmentioning

confidence: 99%

“…Bozkurt et al [ 13 ] employed the shot peening of AISI 4140 low-alloy steel and found that the tribocorrosion performance of the material improved with increasing shot peening intensity, in terms of increased surface hardness. The distribution of residual stress in shot peening of 12Cr2Ni4A steel was investigated by Zhao et al [ 11 ] in order to optimize the processing parameters, and a numerical stimulation using the Computational Fluid Dynamics and Finite Element Model was also conducted in order to study the influence of processing parameters on the induced compressive residual stress and its strengthening mechanism [ 14 ]. Residual stress is one of the most important factors affecting machining performance in the advanced manufacturing process [ 15 , 16 ], and should be considered in the shot peening process as well.…”

Section: Introductionmentioning

confidence: 99%

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Strengthening Performance Optimization of Single Ball Impact Treatment by Evaluating Residual Stress

Yang

Wang

2022

Materials

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Residual stress plays an essential role in affecting the strengthening performance by a surface treatment. Studying the impact of a single ball on a target surface is the basis of shot peening technology in order to obtain the distribution of the residual stress, and to optimize the processing parameters. In this paper, a numerical model has been developed to represent single ball impacts on high manganese steel by considering different processing parameters. It was found that by increasing the ball diameter and impact velocity, the depth of maximum residual compressive stress and the depth of the residual compressive stress layer became significantly enlarged due to increasing kinetic energy of the impacting ball. It was also found from simulation that with an increase in ball impact angle, the maximum residual compressive stress, the depth of maximum residual compressive stress and the depth of the residual compressive stress layer were significantly improved; an exception was the surface residual compressive stress, which showed a decreasing trend. Moreover, by employing quantitative analysis with the entropy method, it was found that within the range of processing parameters considered in the simulation, it is recommended to use a ball with a diameter of 0.6 mm to impact the target, with a velocity of 80 m/s and an angle of 90° for the best strengthening performance.

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Section: Numerical Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strengthening Performance Optimization of Single Ball Impact Treatment by Evaluating Residual Stress

Yang

Wang

2022

Materials

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“…Pneumatic shot peening, as a mechanical surface strengthening method [1][2][3][4][5][6][7], can introduce compressive residual stress (RS) in the surface layer, so as to improve target's performance including fatigue life [8][9][10] and wear resistance [4,[11][12][13][14][15][16]. Hence, it has been widely used in aviation, aerospace, automobile, and other fields.…”

Section: Introductionmentioning

confidence: 99%

DEM-FEM coupling analysis of shot′s energy distribution and target′s residual stress of pneumatic shot peening

Wu,

Shao,

et al. 2023

Mater. Res. Express

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Pneumatic shot peening is a widely used surface strengthening method. During the peening process, shots often collide with each other, resulting in large energy loss and small compressive residual stress. In order to achieve the optimum compressive residual stress with as little energy loss as possible, firstly the collision mechanism of shots and the forming and coupling mechanism of the target’s residual stress are revealed, and then pneumatic shot peening is simulated by using DEM-FEM coupling model. Then, the effects of impact angle θ, initial shot velocity v 0, shot diameter d p, and mass flow rate r m on the percentage η of shots with different ratios of the impact velocity to initial shot velocity v m/v 0, the energy loss (EL), the energy transferred from shots to the target (ET), the residual energy (ER) and the compressive residual stress (RS) are investigated. The results show that as many random shots successively impact the target, the RS field induced by each shot couples with some adjacent RS fields induced by other shots, so that disperse RS fields are gradually transformed into a continuous RS layer with the compressive RS in the surface and the tensile RS in the subsurface. With the increase of θ and r m and with the decrease of v 0 and d p, the collision probability of shots increases, so EL also increases and η of shots with a large v m/v 0 decreases. While, ET increases with the increase of v 0 and d p, decreases with the increase of r m, and first increases and then decreases with the increase of θ. ET does not entirely determine but greatly affects the compressive RS field. So, the surface compressive RS and the maximum compressive RS first increase and then decrease with the increase of θ and r m, while the two parameters increase with the increase of v 0 and d p. The optimum parameters of shots are θ = 75°, v 0 = 60 m s−1, d p = 0.25 mm and r m = 2 kg min−1, in which ET reaches 45%, the surface compressive RS of S11 and S33 reach 512 MPa and 510 MPa respectively, and the maximum compressive RS of S11 and S33 reach 665 MPa and 746 MPa respectively.

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“…Shot peening has important industrial applications [19][20][21][22][23]. However, existing researches on shot peening surface morphology are mostly based on the realization of machining mechanism [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A new method of layered superposition reconstruction modeling on grinding-shot peening surfaces

Tang¹,

Chen²,

Yang³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Shot peening for semi-finished or finished parts is a high-performance precision manufacturing process, and the final micro-surface morphology has layered superposition features, that is, the original surface features and shot peening features coexist on the part surface. The existing layered superposition theory is based on the idea that the surface is superimposed under different baselines, but it cannot characterize the two-process surface where the characteristic baseline cannot be separated after shot peening. To solve this problem, a new layered surface superposition modeling method is proposed in this paper with the grinding-shot peening surface as the research object. In this method, the main texture features of the grinding surface are extracted by B-spline surface fitting, and the spatial distribution of craters in the shot peening surface is adjusted by this texture feature. The initial profile of the grinding-shot peening surface is constructed according to the Pawlus superposition theory, and its height parameters are adjusted by the time-frequency iteration method. In this paper, the modeling method is verified by the measured grinding-shot peening surfaces with a coverage of 100% and 200%. The results show that this method can not only ensure the uniformity of crater texture on the reconstructed surface, but also ensure that the maximum error of spatial parameters is less than 2%. Moreover, the symmetrical autocorrelation functions of the reconstructed surface are consistent with the characteristics of the measured surface.

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A CFD-FEM numerical study on shot peening

Cited by 35 publications

References 40 publications

Strengthening Performance Optimization of Single Ball Impact Treatment by Evaluating Residual Stress

Strengthening Performance Optimization of Single Ball Impact Treatment by Evaluating Residual Stress

DEM-FEM coupling analysis of shot′s energy distribution and target′s residual stress of pneumatic shot peening

A new method of layered superposition reconstruction modeling on grinding-shot peening surfaces

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