Enhancement of fatigue strength of SAE 9245 steel by shot peening

Tekeli, Süleyman

doi:10.1016/s0167-577x(02)00838-8

Cited by 115 publications

(55 citation statements)

References 3 publications

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“…1) Poor material properties at the surface due to decarburization can thus lead to local failure on the surface and, consequently, failure of the entire component. 2) To avoid the surface decarburization, it is important to investigate the responsible physical mechanisms and to identify the main contributing factors to decarburization. If the main causes for severe decarburization are known, methods can be developed to reduce the amount of decarburization during the steel production process.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Decarburized Ferrite Depth of Hypoeutectoid Steel with Simultaneous Oxidation

Choi

Zwaag

2012

ISIJ Int.

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The objective of this paper is to describe a method of calculating the decarburized ferrite depth and scale thickness during heating and cooling for hypoeutectoid steel in ambient atmosphere. The decarburization behavior in hypoeutectoid steel is divided into three regions. In temperature region above A3 ferrite is not formed during decarburization from austenite with a carbon concentration C = 0.0 wt%. In temperature region below A3 (C = 0.0 wt.%) and above A3 (C = C0) the decarburized ferrite forms from austenite during decarburization, but its carbon concentration ranges from 0.0 to the nominal carbon concentration C0. Finally, in the temperature region below A3 (C = C0) austenite transforms to ferrite + austenite or ferrite + cementite and the decarburized ferrite forms from ferrite + austenite or ferrite + cementite by surface decarburization with the appropriate equilibrium concentration. Separate decarburization models were developed for the three temperature regions due to the difference in decarburization behavior. The proposed model also handles simultaneous oxidation. The quantitative information obtained on the oxidation and decarburization characteristics is in good agreement with the experiments.

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Section: Introductionmentioning

confidence: 99%

Prediction of Decarburized Ferrite Depth of Hypoeutectoid Steel with Simultaneous Oxidation

Choi

Zwaag

2012

ISIJ Int.

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“…12 Results of erosion depth and XRF chemical data measurements of Zn and Cu for the different blasting positions. The error bars represent the standard deviations for the three XRF measurements [11][12][13][14]. In contrast, the residual stress measurements for the investigated grit-blasted Inconel shaft show an expected profile, but these profiles have a much higher maximal stress magnitude and a much lower penetration depth compared to other results, such as the results reported by Cai et al (Ref 7) where the same super alloy was studied.…”

Section: Discussionmentioning

confidence: 66%

Grit Blasting for Removal of Recast Layer from EDM Process on Inconel 718 Shaft: An Evaluation of Surface Integrity

Holmberg

Wretland

Berglund

2016

J. of Materi Eng and Perform

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The heat generated during EDM melts the work material and thereby allows large amounts to be removed, but an unfavorable surface of a recast layer (RCL) will also be created. This layer has entirely different properties compared to the bulk. Hence, it is of great interest to efficiently remove this layer and to verify that it has been removed. The main objective of this work has been to study the efficiency of grit blasting for removal of RCL on an EDM aero space shaft. Additionally, x-ray fluorescence (XRF) has been evaluated as a nondestructive measurement to determine RCL presence. The results show that the grit-blasting processing parameters have strong influence on the ability to remove RCL and at the same time introduce beneficial compressive stresses even after short exposure time. Longer exposure will remove the RCL from the surface but also increase the risk that a larger amount of the blasting medium will get stuck into the surface. This investigation shows that a short exposure time in combination with a short grit-blasting nozzle distance is the most preferable process setting. It was further found that handheld XRF equipment can be used as a nondestructive measurement in order to evaluate the amount of RCL present on an EDM surface. This was realized by analyzing the residual elements from the EDM wire.

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“…Therefore, higher CRS always result in greater improvements of the fatigue properties of the metallic materials. 9) Another important reason of SP improving the fatigue strength is the work-hardening effects which depend on the microstructures of the peened surface. X-ray diffraction (XRD) profiles are mainly determined by the microstructures of the crystalline materials.…”

Section: Resultsmentioning

confidence: 99%

Surface Layer Characteristics of TiB<SUB>2</SUB>/Al Composite by Stress Peening

Luan

Jiang

Ji³

2009

Mater. Trans.

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The effect of stress peening on the surface layer characteristics of the TiB 2 /6351Al Composite including residual stress, microhardness and microstructures were investigated. The results show that the compressive residual stresses and microhardness were improved by stress peening. Microstructures investigation showed that, the deformation amount increased by stress peening which results in smaller domain size and higher density dislocations/microstrain. The more reinforcements distributed in the matrix played an important role in the compressive residual stresses increments and microstructures improvements. Stress peening is an effective method to improve the compressive residual stresses and the work-hardened state of the TiB 2 /6351Al Composite.

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Enhancement of fatigue strength of SAE 9245 steel by shot peening

Cited by 115 publications

References 3 publications

Prediction of Decarburized Ferrite Depth of Hypoeutectoid Steel with Simultaneous Oxidation

Prediction of Decarburized Ferrite Depth of Hypoeutectoid Steel with Simultaneous Oxidation

Grit Blasting for Removal of Recast Layer from EDM Process on Inconel 718 Shaft: An Evaluation of Surface Integrity

Surface Layer Characteristics of TiB<SUB>2</SUB>/Al Composite by Stress Peening

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