Fatigue behavior of notched steel specimens with nanocrystallized surface obtained by severe shot peening

Bagherifard, Sara; Fernández-Pariente, I.; Ghelichi, R.; Guagliano, Mario

doi:10.1016/j.matdes.2012.09.025

Cited by 89 publications

(47 citation statements)

References 18 publications

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“…The as-built AlSi10Mg microstructure also showed an inhomogeneity, resulting in an anisotropic structure [6]. Moreover, fatigue, fretting fatigue, wear, and corrosion are considered to be the most common failures of engineering materials to withstand their propagation inside the part [7]. Consequently, the surface treatment of as-built AM parts is required to improve their surface integrity and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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Abstract:The additive manufacturing (AM) of aluminum alloys promises to considerably enhance the performance of lightweight critical parts in various industrial applications. AlSi10Mg is one of the compatible Al alloys used in the selective laser melting of lightweight components. However, the surface defects obtained from the as-built parts affect their mechanical properties, and thus represent an obstacle to using them as final products. This study aims to improve the surface characteristics of the as-built AlSi10Mg parts using shot peening (SP). To achieve this goal, different SP intensities were applied to various surface textures of the as-built samples. The SP results showed a significant improvement in the as-built surface topography and a higher value of effective depth using 22.9 A intensity and Gp165 glass beads. The area near the shot-peened surface showed a significant microstructure refinement to a specific depth due to the dynamic precipitation of nanoscale Si particles. Surface hardening was also detected and high compressive residual stresses were generated due to severe plastic deformation. The surface characteristics obtained after SP could result in a significant improvement in the mechanical properties and fatigue strength, and thus promise performance enhancement for critical parts in various industrial applications.

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Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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“…The shot peening is done with high coverage and/or high intensity. Bagherifard et al [34] used an intensity of 0.18 mm Almen C and a coverage of 1500%. The average grain size was measured to 50 nm and the fatigue life improved with 246%.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Shot Peening on Case Hardened SS2506 Gear Steel

Nordin

Alfredsson

2017

Exp Tech

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Shot peening is a manufacturing process commonly used to increase fatigue life in components for the automotive and aircraft industry. In this paper the effect of shot peening is described for a case hardened gear steel. For gears there are three main factors from shot peening that influence fatigue life: residual stresses, microstructure and surface roughness. The paper describes an experimental series where these parameters were measured for common industrial shot peening settings. The aim was to show how several different measurement techniques and results correspond to each other for certain shot peening parameters. The aim was also to gather experimental results that can be used for verification of shot peening simulations. To simplify measurements and decrease variation, flat steel plates were used as targets. Residual stress, full width at half maximum (FWHM), retained austenite, surface roughness/topology, hardness and Barkhausen noise were measured and related to microstructural changes. The mean indentation diameter was measured for individual shots at low coverage of each intensity which was used to determine the average velocity of the media. The mean diameter and hardness of the shot peening media was also determined.

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“…It is worth noting that surface roughness directly affects the friction behavior of the contact surfaces. Common SPD methods, like shot peening, usually increase surface roughness while strengthening the surface layer, which may negate the advantages brought by surface treatments [18,19].…”

Section: Methodsmentioning

confidence: 99%

Dry Sliding Tribological Behavior of TC11 Titanium Alloy Subjected to the Ultrasonic Impacting and Rolling Process

Zhao

Xue

Liu

2017

Metals

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Abstract:The dry sliding friction and wear behaviors of TC11 titanium alloy subjected to the ultrasonic impacting and rolling process (UIRP) were studied in the present work. The microstructure of the deformation layer and the morphology of the worn surfaces were observed. The results clearly show that the wear performance of TC11 alloy after UIRP is better than that of TC11 alloy before UIRP under the same testing conditions. This can be attributed to the gradient nanostructure, work hardening, and low surface roughness of the treated surface layer. For the untreated samples, wear resistance first decreases and then increases with the increase of the sliding speed. Both the friction coefficient (FC) and wear rate reach a maximum value at a sliding speed of 478 r/min, and the corresponding worn surface is the most serious. While for UIRP treated samples, better friction and wear behaviors are obtained at a sliding speed of 478 r/min. This is because the deformation layer plays a protective role against wear.

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Fatigue behavior of notched steel specimens with nanocrystallized surface obtained by severe shot peening

Cited by 89 publications

References 18 publications

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Experimental Investigation of Shot Peening on Case Hardened SS2506 Gear Steel

Dry Sliding Tribological Behavior of TC11 Titanium Alloy Subjected to the Ultrasonic Impacting and Rolling Process

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