Subsurface inclusion-induced crack nucleation and growth behaviors of high strength steels under very high cycle fatigue: Characterization and microstructure-based modeling

Li, Wei; Deng, Hailong; Sun, Zhu-Zhu; Zhang, Zhenyu; Lu, Liantao; Sakai, Tatsuo

doi:10.1016/j.msea.2015.06.037

Cited by 30 publications

(21 citation statements)

References 32 publications

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“…The Δ K th follows the same linear trend before and after the ESR process, with similar estimated coefficients. The slope of the interpolating function is close to the value reported in the VHCF literature ( α th = 1/3) for high‐strength steels with Vickers hardness smaller than 600 HV. Figure plots the Δ K th values with respect to the number of cycles to failure.…”

Section: P‐s‐n Curves and Size Effectsupporting

confidence: 77%

Effect of electroslag remelting on the VHCF response of an AISI H13 steel

Tridello

Paolino

Chiandussi

et al. 2017

Fatigue Fract Eng Mat Struct

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Experimental results have shown that high‐strength steels can fail in the Very‐High‐Cycle Fatigue (VHCF) regime with cracks originating from internal defects. Material cleanliness thus plays a major role in the VHCF response of high‐strength steels and refinement processes (eg, electroslag remelting [ESR] and vacuum arc remelting) could significantly enhance their performance. The present paper aims at investigating the effect of the ESR process on the VHCF behavior of an AISI H13 steel by carrying out fully reversed ultrasonic tension‐compression tests on hourglass specimens manufactured with and without the ESR process. Size effect is also taken into account in the paper: the effectiveness in the prediction of the VHCF response of specimens with large risk‐volumes from experimental data on specimens with small risk‐volumes is discussed and experimentally validated.

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Section: P‐s‐n Curves and Size Effectsupporting

confidence: 77%

Effect of electroslag remelting on the VHCF response of an AISI H13 steel

Tridello

Paolino

Chiandussi

et al. 2017

Fatigue Fract Eng Mat Struct

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“…The ridges on fatigue fracture surfaces (also known as ‘wing‐like structures’), 8 formed along the crack propagation direction, can be observed preferentially in low and medium carbon steels with a tempered martensite structure 14,52–54 . For the case of 42CrMo4‐tempered steel, investigated in present work, ridges are noticeable not only within a fisheye 55 but even on fatigue cracks initiated from the surface 34 .…”

Section: Discussionmentioning

confidence: 54%

On the formation of ridges and burnished debris along internal fatigue crack propagation in 42CrMo4 steel

Seleznev

Weidner

Biermann

2020

Fatigue Fract Eng Mat Struct

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A detailed microscopic analysis of fracture surfaces of 42CrMo4-hardened steel after ultrasonic fatigue testing revealed globular and cylindrical particles located in ridges along the crack propagation direction. Observed particles could be easily taken for non-metallic inclusions; however, chemical analysis showed that they are of the same composition as the steel matrix. The formation of such round-shaped debris was found to be a result of cutting out the matrix fragments by 'en passant' cracks interaction and their subsequent fretting burnishing. Possible correlation of the parameters of ridges and debris with cyclic plastic zone width and martensite structure is discussed.42CrMo4 steel, en passant cracks, fretting, high cycle fatigue, ultrasonic fatigue testing (USFT)

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“…Several researchers have reported fatigue failures after 10 7 cycles and it has been often shown that in the range of 10 6 -10 8 the failure mechanism changes and the cracks start to initiate from the subsurface defects such as inclusions and pores instead of material surface; see e.g. [10] - [16]. The experimental results have shown that it is unsafe to assume infinite life after the specimen has lasted a certain number of cycles.…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

et al. 2018

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This paper investigates experimentally the fatigue strength of high strength steel, which has undergone normal shipyard production process of plasma cutting, grinding and sandblasting. The study includes steels with the yield strength of 355 and 690 MPa. The tested specimens are of dog-bone shape and represent the large-scale situation of a cruise ship balcony opening corner, loaded in shear or tension. The influence of surface roughness, internal inclusions, hardness and residual stress on the fatigue strength are studied and discussed. Compared to the design curve as well as to the untreated surfaces, the results show significantly improved fatigue strength under constant amplitude loading at a load ratio of R = 0.1. However, very flat or even rising slope of the S-N curve indicates variations in the material and surface quality as well as in the residual stress. Surprisingly, internal defects even up to 100 micrometers in size did not decrease the fatigue strength.

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Subsurface inclusion-induced crack nucleation and growth behaviors of high strength steels under very high cycle fatigue: Characterization and microstructure-based modeling

Cited by 30 publications

References 32 publications

Effect of electroslag remelting on the VHCF response of an AISI H13 steel

Effect of electroslag remelting on the VHCF response of an AISI H13 steel

On the formation of ridges and burnished debris along internal fatigue crack propagation in 42CrMo4 steel

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

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