Improvement of Fatigue Strength of Maraging Steel by Shot Peening

Kawagoishi, Norio; Nagano, Takanori; Moriyama, Michihiko; Kondo, Eiji

doi:10.1080/10426910903386055

Cited by 33 publications

(15 citation statements)

References 5 publications

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“…It is noticeable that the shot peening process can considerably improve the fatigue lives of case-hardened specimens, which is attributed to the microstructure refinement, retained austenite reduction, microhardness amelioration, compressive residual stress generation, and surface roughness alteration induced by shot peening processes. ese improved attributes are revealed to exhibit beneficial effects on fatigue strength and bending fatigue life [28]. It is worth noting that the trend of fatigue life improvement is highly dependent on the surface and subsurface layer properties which are controlled by shot peening conditions.…”

Section: Fatigue Test Datamentioning

confidence: 99%

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Zhang

et al. 2018

Advances in Materials Science and Engineering

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e present study is conducted with a dual-aim: firstly, to examine the effect of several single shot peening conditions on the subsurface layer properties and fatigue performance of the case-hardened 18CrNiMo7-6 steel, and secondly, to propose an optimized peening condition for improved fatigue performance. By carrying out the subsurface integrity analysis and fatigue testing, the underlying relationships among the peening process, subsurface layer property and fatigue performance are investigated, the way peening conditions affect the fatigue life and its associated scatter for the case-hardened 18CrNiMo7-6 steel is quantitatively assessed. e in-depth study shows that dual peening can be an optimized solution, for it is able to produce a subsurface layer with enhanced properties and eventually gain a significant improvement in fatigue performance.

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Section: Fatigue Test Datamentioning

confidence: 99%

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Zhang

et al. 2018

Advances in Materials Science and Engineering

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“…This surface treatment consists in bombarding the surface of the component with a stream of small, high hardness spheres, called shots. These impacts plastically deform the surface layer (increasing local hardness), while the underneath region remains elastic, given rise to a compressive residual stress field [13][14][15][16][17][18][19][20], as it is shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 97%

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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“…Rotating bending fatigue tests showed that the S-N curve measured with shotpeened specimens was shifted towards higher stress amplitudes compared with the untreated material due to the beneficial influence of surface compression stresses. Surface crack initiation in the HCF regime and interior crack initiation at inclusions in the VHCF regime was observed for the shot-peened material [3,4]. Nitriding is an effective method to increase the wear resistance and can also have beneficial influences on the fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

“…The relatively low cyclic strength in relation to the very high static strength was attributed to cyclic softening and growth of precipitates during cyclic deformation. Moriyama et al [3] and Kawagoishi et al [4] studied the influence of shot peening on the fatigue strength of 18Ni maraging steel. Rotating bending fatigue tests showed that the S-N curve measured with shotpeened specimens was shifted towards higher stress amplitudes compared with the untreated material due to the beneficial influence of surface compression stresses.…”

Section: Introductionmentioning

confidence: 99%

Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel

Karr¹,

Schuller²,

Fitzka³

et al. 2017

J Mater Sci

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The very high cycle fatigue (VHCF) properties of four 18Ni maraging steels were investigated. Ultrasonic fatigue tests were performed on thin sheets with nitrided surfaces at load ratio R = 0.1. Traditional maraging steel containing Ti (material A) showed crack initiation at TiN-inclusions. The elimination of Ti and the increase in Co content (material B) lead to preferential crack initiation at aluminate-inclusions. Aluminate-inclusions are less damaging than TiN-inclusions, and material B shows higher VHCF strength than material A. A further developed maraging steel (material C) with reduced Co content that is compensated for by alloying with Al showed crack initiation at aluminate-as well as at Zr(N,C)-inclusions. Zr(N,C)-inclusions are more damaging than aluminateinclusions and less damaging than TiN-inclusions. The highest VHCF strength was found for a recently developed alloy with further increased Al content (material D). In addition to inclusion-initiated fracture, this material showed shear mode crack initiation in the nitrided zone at the surface.

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Improvement of Fatigue Strength of Maraging Steel by Shot Peening

Cited by 33 publications

References 5 publications

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

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

Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel

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