Fatigue behavior of bainitic and martensitic super clean Cr–Si high strength steels

Serbino, Edison Marcelo; Tschiptschin, André Paulo

doi:10.1016/j.ijfatigue.2013.12.007

Cited by 12 publications

(4 citation statements)

References 4 publications

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“…Additionally, the BURs work at 100–175 RPM for 28 days (22 h per day), resulting in approximately 3.7 × 10 6 to 6.5 × 10 6 cycles. This range is within the finite life range reported for a similar material by Serbino and Tschiptschin [ 27 ].…”

Section: Discussionsupporting

confidence: 87%

Influence of Work Hardening on the Surface of Backup Rolls for a 4-High Rolling Mill Fractured during Rolling Campaign

et al. 2022

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Backup rolls are the main tool in a four-high rolling mill; the rolling forces applied in load cells promote the fatigue of the material due to mechanical contact between backup rolls and work rolls. This work investigated the causes of recurrent failures in backup rolls, with cracking always initiated on the surface of the roll body and finishing in the main radius between neck and roll body. Aiming to find the causes of failure, visual inspection and morphology of the fracture were performed, complemented with mechanical tests of hardness on the stress concentration area, in addition to validating the results by applying the finite element method, using ANSYS Mechanical Static Structural Software. It was concluded that the fatigue crack initiated on the surface of BUR due to work hardening continued growing up over the fatigued material, creating beach marks, and finally, a fracture occurred in the main radius of BUR due to stress concentration. The work hardening is the main cause of spalling on BURs and other mechanical components exposed to mechanical contact.

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Section: Discussionsupporting

confidence: 87%

Influence of Work Hardening on the Surface of Backup Rolls for a 4-High Rolling Mill Fractured during Rolling Campaign

et al. 2022

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“…It indicates that the VHCF property can be improved through optimizing BQ-P-T process parameters and subsequent microstructures. Furthermore, the ratio of σ w9 /R m of BQ200 sample is much higher than that of conventional high strength tempered martensitic steels (~0.3-0.4) [30][31]. Here, it suggests that the film-like RA (Fig.2e-f) plays a significant role on the enhanced VHCF property of BQ200 sample.…”

Section: S-n Characteristicsmentioning

confidence: 79%

“…Therefore, the VHCF property of BQ200 sample is improved compared with BQ320 variant. Furthermore, the ratio of σ w9 /R m (0.55) of BQ200 sample is much higher than that of conventional high strength tempered martensitic steels (~0.3-0.4) [30][31].…”

Section: Crack Initiation: the Role Of Retained Austenitementioning

confidence: 84%

Very high cycle fatigue behaviors of bainite/martensite multiphase steel treated by quenching-partitioning-tempering process

Gao

Zhang

Cheng

et al. 2016

International Journal of Fatigue

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“…Conventionally, it was considered that for some metals there is a stress level called the fatigue limit, that can be sustained lab environment due to inclusions in the crystal lattice [6] of steel. Local stresses can lead to fatigue in any kind of metallic springs [5][6][7][8] and industrial environments impose additional risks (i.e., corrosive environment, temperature variations, mechanical handling, manufacturing limitations etc.). Often, high safety factors are employed to guarantee a robust design for a full product line, leading to heavy springs with high inertia.…”

Section: Introductionmentioning

confidence: 99%

Optimal Magnetic Spring for Compliant Actuation—Validated Torque Density Benchmark

et al. 2019

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Magnetic springs are a fatigue-free alternative to mechanical springs that could enablecompliant actuation concepts in highly dynamic industrial applications. The goals of this article are:(1) to develop and validate a methodology for the optimal design of a magnetic spring and (2) tobenchmark the magnetic springs at the component level against conventional solutions, namely,mechanical springs and highly dynamic servo motors. We present an extensive exploration of themagnetic spring design space both with respect to topology and geometry sizing, using a 2D finiteelement magnetostatics software combined with a multi-objective genetic algorithm, as a part of aMagOpt design environment. The resulting Pareto-optima are used for benchmarking rotationalmagnetic springs back-to-back with classical industrial solutions. The design methodology has beenextensively validated using a combination of one physical prototype and multiple virtual designs.The findings show that magnetic springs possess an energy density 50% higher than that of stateof-the-art reported mechanical springs for the gigacycle regime and accordingly a torque densitysignificantly higher than that of state-of-the-practice permanently magnetic synchronous motors.

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Fatigue behavior of bainitic and martensitic super clean Cr–Si high strength steels

Cited by 12 publications

References 4 publications

Influence of Work Hardening on the Surface of Backup Rolls for a 4-High Rolling Mill Fractured during Rolling Campaign

Influence of Work Hardening on the Surface of Backup Rolls for a 4-High Rolling Mill Fractured during Rolling Campaign

Very high cycle fatigue behaviors of bainite/martensite multiphase steel treated by quenching-partitioning-tempering process

Optimal Magnetic Spring for Compliant Actuation—Validated Torque Density Benchmark

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