Influence of Shot Peening on Fatigue Strength of Maraging Steels with Different Hardness

Nagano, Takanori; Kawagoishi, Norio; Moriyama, Michihiko; Chen, Qiang; Nagashima, Etsuichi

doi:10.2472/jsms.56.1126

Cited by 9 publications

(9 citation statements)

References 18 publications

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“…Finally, the retrieved FL of the material for the sample type 3 was 589 MPa. It is interesting to point out that the three values are approximately the 29% of the material UTS: this outcome is in agreement with the fatigue strengths of maraging steels reported in the literature, but much lower, considering the commonly accepted 50% ratio versus UTS for metallic materials . The FLs are also compared in the bar graph in Fig.…”

Section: Discussionsupporting

confidence: 85%

“…The series of failure and not‐failure events has then been processed by the Dixon method . For this purpose, a life duration of 10 cycles has been set as run‐out, based on the literature dealing with maraging steel fatigue properties . The Dixon method is an abbreviated staircase method, which enables estimation of the FL, by trials involving a small set of samples (two to six).…”

Section: Methodsmentioning

confidence: 99%

“…Unfortunately, the fatigue strength and, particularly, the fatigue limit (FL) are lower than the expected one, based on its static strength. The FL can be usually roughly estimated as 50% of the UTS of the base material for most steel materials, whereas for maraging steels, lower values, around 20–30% of the UTS, are reported in the literature . On the other hand, an interesting issue related to this type of material is that it can be efficiently used for the manufacturing of complexly shaped components by means of the modern production techniques of additive manufacturing (AM).…”

Section: Introductionmentioning

confidence: 99%

“…The fatigue strength of maraging steels has been extensively investigated by several authors in recent years. [1][2][3][4][5] The very high performance of this type of steel in terms of static strength (typical values of the ultimate tensile strength (UTS) after the ageing treatment are close to 2000 MPa), along with their well-known large toughness, makes them promising materials to be applied in components or parts with structural complexity and also withstanding fatigue loads. Unfortunately, the fatigue strength and, particularly, the fatigue limit (FL) are lower than the expected one, based on its static strength.…”

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confidence: 99%

See 3 more Smart Citations

Influence of the build orientation on the fatigue strength of EOS maraging steel produced by additive metal machine

Croccolo

Agostinis

Fini

et al. 2016

Fatigue Fract Eng Mat Struct

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This paper presents a research dealing with the dependence of the fatigue strength of maraging steel parts, manufactured by direct selective laser sintering, on the production build orientation. Three sets of specimens have been manufactured according to the ISO 1143 Standard (2010) by EOSINT M280 additive manufacturing machine, with the following heat and mechanical treatments, in agreement with the recommendations by the material manufacturer and current literature. The expected outcomes are the Fatigue Limit values of the material and the maximum number of cycles observed at different stress levels for three different build orientations (three different angles, 0°, 45° and 90°, between the build direction and the longitudinal axis of the samples). The results have been processed and compared by statistical methods in order to determine the fatigue curves in the finite life domain and the fatigue limits, along with their confidence bands and intervals, and to investigate the significance of the build orientation factor.

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Section: Discussionsupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Influence of the build orientation on the fatigue strength of EOS maraging steel produced by additive metal machine

Croccolo

Agostinis

Fini

et al. 2016

Fatigue Fract Eng Mat Struct

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“…This is caused by their high sensitivities for notch and humidity 2,3 . Therefore many studies have been carried out to investigate the improvement methods of fatigue properties, e.g., surface treatments such as shot peening 4 and nitriding 5 , heat treatment for modification of microstructure 6 , and so on. On the other hand, high strength steels are sensitive to hydrogen embrittlement.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aging Structures and Humidity on Fatigue Properties of Maraging Steel

Hayashi

Nagano

Moriyama

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

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Effects of aging structures and humidity on fatigue properties of 350 grade 18% Ni maraging steel were investigated under rotating bending in relative humidity of 25% and 85%. Aging conditions tested were a conventional single aging and a double one which was aged at low temperature after the conventional aging. In each aging, under and peak aged steels were prepared. Tensile strength was increased by the double aging without reduction of the ductility. Proportional relation between fatigue limit and Vickers hardness held until 750HV in low humidity. However fatigue strength was largely decreased by high humidity, especially in the peak aged steel at the single aging. The decrease in fatigue strength by high humidity was mainly caused by the acceleration of a crack initiation due to the anodic dissolution. The acceleration of a crack initiation was larger in the steel peak aged at the single aging with larger precipitated particles.

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Investigation on the Fatigue Behaviors of Maraging Steel at Different Stress Ratios

et al. 2023

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Herein, the high‐cycle fatigue behaviors of 18Ni maraging steel with different tensile strength in the stress ratio range from 0.1 to 0.5 are investigated, and compared with those at the stress ratio of −1. It is found that the relationship between the fatigue strength at the stress ratios of −1 and 0.1 and tensile strength is nonmonotonic, while the fatigue strength at the stress ratio of 0.5 improves as the tensile strength heightens. The tensile strength corresponding to the optimal fatigue strength state would change with the variation of the stress ratio, which is related to the alteration of key factors affecting the fatigue damage. Moreover, it is found that the Walker equation: σaR = σ−1 ⋅ [(1 − R)/2]β gives reasonable results for the influence of stress ratio on the fatigue strength of 18Ni maraging steel.

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Influence of Shot Peening on Fatigue Strength of Maraging Steels with Different Hardness

Cited by 9 publications

References 18 publications

Influence of the build orientation on the fatigue strength of EOS maraging steel produced by additive metal machine

Influence of the build orientation on the fatigue strength of EOS maraging steel produced by additive metal machine

Effects of Aging Structures and Humidity on Fatigue Properties of Maraging Steel

Investigation on the Fatigue Behaviors of Maraging Steel at Different Stress Ratios

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