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

Karr, Ulrike; Schuller, R.; Fitzka, M.; Schönbauer, Bernd M.; Tran, Duc Hoan; Pennings, Bert; Mayer, H.

doi:10.1007/s10853-017-0831-1

Cited by 45 publications

(21 citation statements)

References 41 publications

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“…For example, the Al 2 O 3 inclusion is produced during melting of steel while the TiN inclusions are produced during the casting of steels. Besides, the shape, size, and composition of inclusions, affected by the production method, also differ, leading to different effects on the mechanical properties of steels [28,29].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Inclusions on the Residual Stress Distribution in High-Strength Martensitic Steels During Cooling

Lian

Bao

et al. 2019

Applied Sciences

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In high-strength martensitic steels, the inclusions significantly affect the material performance especially in terms of fatigue properties. In this study, a numerical procedure to investigate the effect of the inclusions types and shapes on the residual stresses during the cooling process of the martensitic steels is applied systematically based on the scanning electronic microscopy (SEM) and energy dispersive spectrometer (EDS) results of different types of inclusions. The results show that the maximum residual stress around the interface between Mg-Al-O inclusion and the matrix is the largest, followed by TiN, Al-Ca-O-S, and MnS when the inclusions are assumed as perfect spheres for simplicity. However, these results are proved to be 28.0 to 48.0% inaccurate compared to the results considering actual shapes of inclusions. Furthermore, the convex shape of inclusion will lead to stress concentration in the matrix while the concave shape of inclusion will lead to stress concentration in the inclusion. The residual stress increases with the increase of inclusion edge angle. The increase rate is the largest for TiN inclusions on the concave angle, which leads to extreme stress concentration inside TiN inclusion.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Inclusions on the Residual Stress Distribution in High-Strength Martensitic Steels During Cooling

Lian

Bao

et al. 2019

Applied Sciences

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“…However, it is difficult to add large amounts of dissolved nitrogen to steel. Furthermore, the large square TiN inclusions with sharp corner may obviously deteriorate the fatigue properties and tend to be the crack initiation . On the other hand, due to the larger size, the additional chemical potential caused by the curvature of MnS inclusion was relatively smaller than the nano‐scale precipitates as well.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Size and Distribution of MnS Inclusions on the Austenite Grain Growth in a Low Cost Hot Forged Steel

Zhao

Yang³

et al. 2017

steel research int.

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The size and thermal stability of Manganese Sulfide (MnS) inclusions in two low cost hot forged steels with no microalloying elements are carefully investigated. Based on the results, the austenite grain growth behavior of the two steels are studied and the effect of MnS inclusions on the austenite grain growth are discussed using an optical microscope, a scanning electron microscopy, and a confocal scanning laser microscopy. Results show that the MnS inclusions hold a favorable thermal stability and do not dissolve in the steel heated at 1250 8C for 30 min. Austenite grains of the steel with larger quantities of smaller size of MnS inclusions are significantly finer than that of the steel with less and larger size of MnS inclusions heated at a temperature above 1000 8C. The differences in grain size become greater, as the heating temperature increases. The pinning effect of MnS inclusions plays an important role during austenite grain growth, when the austenite grain size exceeds the average spacing of MnS inclusions. The results indicate that large quantities of small MnS inclusions can be used to inhibit austenite grain growth during heating process in a low cost hot forged steel, where expensive microalloying elements are removed.

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“…Such a failure is caused by the initiation and growth of small fatigue cracks which eventually result in the complete failure of the component. Small cracks initiate from natural discontinuities and defects in the material, such as non-metallic inclusions [1][2][3][4], casting defects [1,[5][6][7], surface roughness [1,[8][9][10] and welds [11][12][13]. Recently the significant reduction in the fatigue strength of additively manufactured (AM) materials have highlighted the importance of defect tolerance in fatigue critical components [14][15][16][17][18][19].…”

Section: Fatigue Assessmentmentioning

confidence: 99%

An efficient stress intensity factor evaluation method for interacting arbitrary shaped 3D cracks

Åman

Berntsson

Marquis

2020

Theoretical and Applied Fracture Mechanics

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

Cited by 45 publications

References 41 publications

Numerical Study of the Effect of Inclusions on the Residual Stress Distribution in High-Strength Martensitic Steels During Cooling

Numerical Study of the Effect of Inclusions on the Residual Stress Distribution in High-Strength Martensitic Steels During Cooling

The Effect of Size and Distribution of MnS Inclusions on the Austenite Grain Growth in a Low Cost Hot Forged Steel

An efficient stress intensity factor evaluation method for interacting arbitrary shaped 3D cracks

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