The effect of nitriding, severe shot peening and their combination on the fatigue behavior and micro-structure of a low-alloy steel

Hassani-Gangaraj, S.M.; Moridi, Atieh; Guagliano, Mario; Ghidini, A.; Boniardi, Marco

doi:10.1016/j.ijfatigue.2013.04.017

Cited by 129 publications

(82 citation statements)

References 23 publications

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“…4 The fatigue performance of the component is mainly evaluated based on the surface roughness. Hassani-Gangaraj et al 5 reported that the shot peening-induced high surface roughness makes the fatigue crack initiation from the surface. Bagherifard and colleagues 6,7 reported that repeening treatment was not able to reduce the surface roughness, but can induce a more regular surface topography, which is contributed to the fatigue strength improvement.…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of Ti1023 alloy shot peened by cast steel and ceramic shot

Yao

Zhang

2017

Advances in Mechanical Engineering

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To optimize the surface properties such as surface roughness, residual stress, and micro-hardness of Ti1023 titanium alloy, the effects of shot peening on Ti1023 alloy were investigated. Surface roughness, surface topography, residual stress, micro-hardness, and micro-structure were carried out at different shot-peening parameters. The results demonstrate that the increased peening intensity enhances the surface roughness, compressive residual stresses, and hardness in subsurface, which is mainly due to the plastic deformation in the near surface layer. Specimen 11 has a low surface roughness of R a = 1.91 mm, well-developed dimple topography, higher compressive residual stress layer depth of 143 mm, and higher hardened layer depth of 200 mm. The ceramic shots with a diameter of 1.08 mm and peening intensity of 0.18 mm A are the optimal shot-peening conditions.

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Section: Introductionmentioning

confidence: 99%

Surface characterization of Ti1023 alloy shot peened by cast steel and ceramic shot

Yao

Zhang

2017

Advances in Mechanical Engineering

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“…Air blast shot peening becomes a severe process that accesses ultrafine and NC structures when certain combinations of peening parameters are used to multiply the kinetic energy of the shot impacts [14][15][16][17][18]. In general, we differentiate severe shot peening [19][20][21] from conventional shot peening in order to emphasize its aim at generating ultra-fine grained or NC surface layers.…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment and simulation of surface nanocrystallization by severe shot peening

et al. 2015

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Surface nanocrystallization is an effective approach to bypass the difficulties of synthesizing bulk nanocrystalline material and yet exploit its unique advantages in service. This study uses air blast shot peening over a wide range of coverage (peening time), from conventional to severe, to generate nanostructured surface layers on high strength low alloy steel. Electron microscopy observations were carried out to systematically study the degree and the mechanism of grain refinement as the severity of deformation increases. A model linking finite element simulation of severe shot peening to dislocation density evolution due to the accumulated plastic strain was developed to predict the resultant grain/cell size gradient in the surface layers. The proposed framework establishes a physical connection from processing parameters such as media size, velocity and peening coverage to the resultant structure, opening the possibility of designing a severe surface peening process to achieve a desired nanostructure.

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“…In practice, shot peening is more popular than vibration peening to create such stress on the surface, however, the main drawbacks of using the shot peening are non-uniformity and shallow thickness of the treated layer [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization Of Laser Heat Treated AISI 4140 Steel With Improved Fatigue Behavior

Oh¹,

Yeom²,

Jeon³

et al. 2015

Archives of Metallurgy and Materials

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The influence of surface heat treatment using laser radiation on the fatigue strength and corresponding microstructural evolution of AISI 4140 alloy steel was investigated in this research. The AISI 4140 alloy steel was radiated by a diode laser to give surface temperatures in the range between 600 and 800• C, and subsequently underwent vibration peening. The fatigue behavior of surface-treated specimens was examined using a giga-cycle ultrasonic fatigue test, and it was compared with that of non-treated and only-peened specimens. Fatigue fractured surfaces and microstructural evolution with respect to the laser treatment temperatures were investigated using an optical microscope. Hardness distribution was measured using Vickers micro-hardness. Higher laser temperature resulted in higher fatigue strength, attributed to the phase transformation.

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The effect of nitriding, severe shot peening and their combination on the fatigue behavior and micro-structure of a low-alloy steel

Cited by 129 publications

References 23 publications

Surface characterization of Ti1023 alloy shot peened by cast steel and ceramic shot

Surface characterization of Ti1023 alloy shot peened by cast steel and ceramic shot

Experimental assessment and simulation of surface nanocrystallization by severe shot peening

Microstructural Characterization Of Laser Heat Treated AISI 4140 Steel With Improved Fatigue Behavior

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