Effect of severe shot peening on microstructure and fatigue strength of cast iron

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

doi:10.1016/j.ijfatigue.2013.08.022

Cited by 172 publications

(66 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shot peening usually produces detrimental surface effects too, such as increasing roughness, nevertheless it has been shown that the average effect of both beneficial phenomena is more important than those induced by superficial detrimental effects [12,13]. Recent studies [14,15,16], demonstrated that the generation of a nanograined layer over specimens' surface results in a fatigue strength improvement. However, this is true as long as the density and size of surface defects induced by shot peening remain not significant.…”

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on metastable austenitic stainless steels

Fargas

Roa

Mateo

2015

Materials Science and Engineering: A

View full text Add to dashboard Cite

In this work, shot peening was performed in a metastable austenitic stainless steel EN 1.4318 (AISI 301LN) in order to evaluate its effect on austenite to martensite phase transformation and also the influence on the fatigue limit. Two different steel conditions were considered: annealed, i.e., with a fully austenitic microstructure, and cold rolled, consisting of a mixture of austenite and martensite. X-ray diffraction, electron backscattered diffraction and focus ion beam, as well as nanoindentation techniques, were used to elucidate deformation mechanisms activated during shot peening and correlate with fatigue response. Results pointed out that extensive plastic deformation and phase transformation developed in annealed specimens as a consequence of shot peening.However, the increase of roughness and the generation of microcracks led to a limited fatigue limit improvement. In contrast, shot peened cold rolled specimens exhibited enhanced fatigue limit. In the latter case, the main factor that determined the influence on the fatigue response was the distance from the injector, followed successively by the exit speed of the shots and the coverage factor.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on metastable austenitic stainless steels

Fargas

Roa

Mateo

2015

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…Arakawa et al [12] studied the effect of USP on the fatigue characteristics of high strength structural materials of hydroelectric facilities, and the results showed that the fatigue limit of the treated material was approximately increased by 60%. For the high strength materials, the higher compressive residual stress can be formed and maintained after surface strengthening treatment, and the fatigue properties can be better improved [13,14]. As to low strength materials (magnesium or aluminum alloy), the lower compressive residual stress induced by surface strengthening treatment is easily relaxed at the moment a random or occasional high load appears, which will result in a limited improvement of fatigue properties.…”

Section: Introductionmentioning

confidence: 99%

Surface Characteristics and Fatigue Behavior of Gradient Nano-Structured Magnesium Alloy

Zhao

Zhang

Liu

2017

Metals

View full text Add to dashboard Cite

High-frequency impacting and rolling was applied on AZ31B magnesium alloy to obtain a gradient nano-structured surface. Surface characteristics were experimentally investigated, and the nanocrystallization mechanism is discussed in detail. Results showed that the gradient nano-structure with the characteristics of work hardening, compressive residual stress and a smooth surface was induced on the treated surface. Grains on the top surface were generally refined to around 20 nm. Twins, dislocations and dynamic recrystallization dominated the grain refinement process. Fatigue strength of the treated specimens corresponding to 10 7 cycles was increased by 28.6% compared to that of the as-received specimens. The work hardened layer induced by high-frequency impacting and rolling is the major reason to improve fatigue life.

show abstract

“…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. Thus, the surface topography is a better indicator of fatigue performance than the roughness parameters.…”

Section: Introductionmentioning

confidence: 99%

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

Yao

Zhang

2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

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.

show abstract

Effect of severe shot peening on microstructure and fatigue strength of cast iron

Cited by 172 publications

References 23 publications

Effect of shot peening on metastable austenitic stainless steels

Effect of shot peening on metastable austenitic stainless steels

Surface Characteristics and Fatigue Behavior of Gradient Nano-Structured Magnesium Alloy

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

Contact Info

Product

Resources

About