Influence of Semi-Random and Regular Shot Peening on Selected Surface Layer Properties of Aluminum Alloy

Matuszak, Jakub; Zaleski, Kazimierz; Skoczylas, Agnieszka; Ciecieląg, Krzysztof; Kęcik, Krzysztof

doi:10.3390/ma14247620

Cited by 17 publications

(19 citation statements)

References 39 publications

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“…The impact of shot peening balls causes dimples to be formed on the treated surface. Depending on the dimple formation pattern, a distinction is made between random and regular shot peening [ 14 , 15 ]. In random shot peening, dimples are formed irregularly and at different distances from each other.…”

Section: Introductionmentioning

confidence: 99%

Study on the Surface Layer Properties and Fatigue Life of a Workpiece Machined by Centrifugal Shot Peening and Burnishing

Skoczylas

Zaleski

2022

Materials

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This paper presents the results of research on the impact of finishing method on surface topography, surface roughness (parameters Ra, Rt, Rpk, Rk, Rvk), surface layer microhardness, residual stresses and fatigue life. Ring samples made of C45 steel were used to conduct the experiments. The following finishing machining methods were selected: slide burnishing, ball burnishing, centrifugal shot peening, centrifugal shot peening + slide burnishing and centrifugal shot peening + ball burnishing. In the first stage, the use of combined shot peening + burnishing enables microhardness to be increased on the surface layer, the values of residual stresses to be increased and the creation of characteristic machining traces on the surface, the so-called “dimples” (effect of centrifugal shot peening). On the other hand, burnishing (slide burnishing or ball burnishing) is aimed at smoothing the surface and providing favorable stereometric properties to the surface layer. It was noted that, after finishing, the surface roughness parameters decreased from 59% to 83% in relation to the reference surface. The exception is the centrifugal shot peening technology. The use of burnishing (slide or ball burnishing) after centrifugal shot peening reduces the surface roughness parameters by a maximum of 82% compared to the value after centrifugal shot peening. The highest increase in microhardness was obtained after centrifugal shot peening + slide burnishing (ΔHV = 105 HV 0.05), while the highest thickness gh (gh = 120 μm) was obtained after centrifugal shot peening + ball burnishing. The combination of centrifugal shot peening and ball burnishing results in the highest absolute value of compressive residual stresses σmax = 602 MPa and depth gσ = 0.41 mm). Application of an additional operation after centrifugal shot peening increases fatigue life from 27% to 49%. ANOVA analysis of variance confirms the significance of the processing effect of centrifugal shot peening combined with slide burnishing (CSP + SB) and centrifugal shot peening + ball burnishing (CSP + BB) on the analyzed dependent surface.

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Section: Introductionmentioning

confidence: 99%

Study on the Surface Layer Properties and Fatigue Life of a Workpiece Machined by Centrifugal Shot Peening and Burnishing

Skoczylas

Zaleski

2022

Materials

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“…1). In detail, this method of applying traces was described in [9]. The shot peening stand consisted of a replaceable head that allowed for changing the diameter of the ball-shaped burnishing element (d).…”

Section: Methodsmentioning

confidence: 99%

“…These parameters can however be determined in impulse shot peening, in which the shot peening elements hit the workpiece with a known energy. The distances between successive dimples of hits can also be determined, which makes it possible to calculate impact density [8,9]. Shot peening is mainly used to improve the properties of the surface layer of workpieces.…”

Section: Introductionmentioning

confidence: 99%

Study on selected properties of the surface layer of magnesium alloys after impulse shot peening

Skoczylas,

Zaleski,

Ciecieląg

et al. 2024

Preprint

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Shot peening is a commonly used method of finishing machine elements in the manufacturing process. One variation of shot peening is the impulse shot peening. This paper presents the influence of impulse shot peening technological conditions on the surface roughness (parameters Ra and Rt) and topography, microhardness. The FEM was used to determine the S11 stresses. In the experiment and simulation tests, AZ31 and AZ91HP magnesium alloy samples were used. Variable parameters in the impulse shot peening process were: impact energy E: 15 ÷ 185 mJ, ball diameter d: 3 ÷ 15 mm and impact density j: 3 ÷ 44 mm− 2. As a result of the tests carried out, it was found that after impulse shot peening, the surface topography is change, microirregularities are flattened, numerous depressions are formed, which can be potential lubrication pockets. The 2D surface roughness parameters for most impulse shot peening conditions are lower than for the pre-machining. The roughness parameters for magnesium alloy AZ91HP are lower than for AZ31. This is most likely due to the lower elongation A. The microhardness after impulse shot peening increased by 20 HV to 87 HV. As a result of FEM of the impulse shot peening, compressive stresses S11 were created in the surface layer. The depth of occurrence of S11 stresses is from 1.5 to 3.5 mm, and their value for the AZ91HP magnesium alloy samples are 10–25% lower than for the AZ31 alloy samples. The most favorable results of the tested properties of the surface layer were obtained for E = 100 mJ, d = 10 mm, j = 11 mm− 2.The abstract serves both as a general introduction to the topic and as a brief, non-technical summary of the main results and their implications.

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“…Among the many ways and methods for changing the properties of the surface layer, one can distinguish burnishing and shot peening, based on cold work hardening of the surface layer [ 9 ]. The effect of burnishing treatment on the cold work hardening of the surface layer and thus improving its fatigue strength was investigated in [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effectiveness of Removing Surface Defects by Brushing

et al. 2022

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The paper presents the results of a study on the effectiveness of removing surface defects by brushing. Damage to machine components usually begins on their surface or in the surface layer area. This determines the development of methods, conditions, and process parameters that will positively affect the stereometric and physical properties of the surface layer. Experiments were conducted in which surface defects were generated on a specially designed test stand. By controlling the load and speed of the defect generator it was possible to affect the geometry, depth, and width of the surface defect. A FEM simulation of the brushing treatment was carried out in order to determine the effect of fibers passing through a surface defect in the form of a groove with a small depth and width. It was shown that for certain conditions of brushing treatment, surface defects could be removed effectively. Moreover, the microhardness of the surface layer after the brushing process was analyzed. Changes in microhardness due to brushing reached up to 50 μm for EN AW-2024 aluminum alloy and up to 150 μm for AZ91HP magnesium alloy. The results demonstrated that brushing was an effective method for strengthening the surface layer and that the value of strengthening in the area of defects depended on the effectiveness of their removal.

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Influence of Semi-Random and Regular Shot Peening on Selected Surface Layer Properties of Aluminum Alloy

Cited by 17 publications

References 39 publications

Study on the Surface Layer Properties and Fatigue Life of a Workpiece Machined by Centrifugal Shot Peening and Burnishing

Study on the Surface Layer Properties and Fatigue Life of a Workpiece Machined by Centrifugal Shot Peening and Burnishing

Study on selected properties of the surface layer of magnesium alloys after impulse shot peening

Analysis of the Effectiveness of Removing Surface Defects by Brushing

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