Effects of conventional, severe, over, and re-shot peening processes on the fatigue behavior of mild carbon steel

Maleki, Erfan; Ünal, Okan; Kashyzadeh, Kazem Reza

doi:10.1016/j.surfcoat.2018.02.081

Cited by 119 publications

(33 citation statements)

References 34 publications

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“…Alikhani et al [ 7 ] reported similar findings that deformation layer depth was limited since the needed energy for deformation of the underlying layers do not reach deeper regions. Similarly, although peening time increases the deformation density, the kinetic energy of shots may not be enough to modify deeper layers [ 50 ] as peening time seems even insignificant in hardness improvement ( Figure 4 ).…”

Section: Resultsmentioning

confidence: 99%

“…Fundamentally being a mechanical surface treatment, shot peening is a complicated process, in which many parameters affect the process performance [ 20 , 49 , 50 , 51 ]. These can be classified into four main groups [ 52 ]: (1) shot characteristics (size [ 20 , 33 , 34 , 53 , 54 , 55 ], type [ 34 , 55 ], shape, density [ 34 ], hardness [ 34 , 53 ], and yield strength [ 20 , 33 , 34 , 52 , 53 , 54 , 56 , 57 ]); (2) process parameters [ 34 ] (shot flow rate, shot pressure [ 20 , 54 , 57 , 58 ], shot speed [ 59 ], impact angle [ 59 , 60 ], nozzle-to-target distance [ 60 ], nozzle diameter, and shot peening duration [ 20 , 32 , 60 , 61 ]); (3) target material properties (mechanical properties [ 34 ] such as hardness, yield strength, toughness, chemical composition and crystal structure [ 20 , 62 ]); and (4) environmental factors (temperature and humidity) [ 53 , 63 ]).…”

Section: Introductionmentioning

confidence: 99%

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Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

et al. 2020

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Ti6Al4V alloy was shot peened by using stainless-steel shots with different sizes (0.09–0.14 mm (S10) and 0.7–1.0 mm (S60)) for two durations (5 and 15 min) using a custom-designed peening system. The shot size was the main parameter modifying the roughness (0.74 µm for S10 vs. 2.27 µm for S60), whereas a higher peening time slightly increased roughness. Hardness improved up to approximately 35% by peening with large shots, while peening time was insignificant in hardness improvement. However, longer peening duration with large shots led to an unwanted formation of micro-cracks and delamination on the peened surfaces. After dry sliding wear tests, the mass loss of peened samples (S60 for 15 min) was 25% higher than that of un-peened samples, while the coefficient of friction decreased by 12%. Plastically deformed regions and micro-scratches were observed on the worn surfaces, which corresponds to mostly adhesive and abrasive wear mechanisms. The present study sheds light on how surface, subsurface and tribological properties of Ti6Al4V vary with shot peening and peening parameters, which paves the way for the understanding of the mechanical, surface, and tribological behavior of shot peened Ti6Al4V used in both aerospace and biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

et al. 2020

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“…Compared to CSP [9,10,12], SSP produces stress profiles containing a high magnitude of compressive stresses penetrating quite deep beneath the free surface (see Figure 5). The maximum of these stresses can be found at a depth of 0.1 to 0.2 mm, followed by a steep decrease and change into tensile stresses in the deeper regions.…”

Section: Xrd Measurementsmentioning

confidence: 99%

“…Segurado et al [8] investigated the effect of different types of shots on surface morphology, residual stresses, and fatigue behaviour. Maleki et al [9] studied the influence of various CSP regimes on grain refinement, stress, and microhardness profiles, as well as on S-N curves. Maleki and Unal [10] studied the influence of surface coverage and the re-peening process on the properties of AISI 1045 steel after CSP as well as SSP.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Evaluation of Steel Surfaces after Severe Plastic Deformation via the Barkhausen Noise Technique

Neslušan

Trško

Minárik

et al. 2018

Metals

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This paper reports about the non-destructive evaluation of surfaces after severe shot peening via the Barkhausen noise technique. Residuals stresses and the corresponding Almen intensity, as well as microstructure alterations, are correlated with the Barkhausen noise signal and its extracted features. It was found that residual stresses as well as the Barkhausen noise exhibit a valuable anisotropy. For this reason, the relationship between the Barkhausen noise and stress state is more complicated. On the other hand, the near-the-surface layer exhibits a remarkable deformation induced softening, expressed in terms of the microhardness and the corresponding crystalline size. Such an effect explains the progressive increase of the Barkhausen noise emission along with the shot-peening time. Therefore, the Barkhausen noise can be considered as a promising technique capable of distinguishing between the variable regimes of severe shoot peening.

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“…Moreover, coverage is defined as the ratio of the area covered by the shot impacts (dimples) to the complete surface of the treated sample, expressed as percentage. The degree of coverage does not increase linearly as a function of the peening time, the approximation to full coverage being exponential, so that full coverage is conventionally assessed when the target has an impacted area of 98 % [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Shot Peening on the Surface Characteristics of 35NCD16 Alloy Steel

Benaı̈ssa

Benkhenafou

Ziadi

et al. 2020

Period. Polytech. Mech. Eng.

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Shot-peening is a surface mechanical treatment, widely used to treat metallic parts in the aerospace and automotive industries. This mechanical surface treatment should not be confused with other common applications of other peening treatments, oriented towards cleaning, preparation or surface finishing. Shot peening is a mechanical treatment used to improve the service life of metallic components, especially when they are submitted to cyclic loads. The effect of shot peening on the surface work hardening and residual stress profile of a 35NCD16 steel was studied in this work.

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Effects of conventional, severe, over, and re-shot peening processes on the fatigue behavior of mild carbon steel

Cited by 119 publications

References 34 publications

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

Non-Destructive Evaluation of Steel Surfaces after Severe Plastic Deformation via the Barkhausen Noise Technique

The Effects of Shot Peening on the Surface Characteristics of 35NCD16 Alloy Steel

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