Multiaxial fatigue strength of common structural steel and the response of some estimation methods

The paper describes results of fatigue strength estimates by selected multiaxial fatigue strength criteria in the region of high-cycle fatigue, and compares them with own experimental results obtained on hollow specimens made from ČSN 41 1523 structural steel. The specimens were loaded by various combinations of load channels comprising push–pull, torsion, bending and inner and outer pressures. The prediction methods were validated on fatigue strengths at seven different numbers of cycles spanning from 100,000 to 10,000,000 cycles. No substantial deviation of results based on the selected lifetime was observed. The PCRN method and the QCP method provide best results compared with other assessed methods. The results of the MMP criterion that allows users to evaluate the multiaxial fatigue loading quickly are also of interest because the method provides results only slightly worse than the two best performing solutions.

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Multiaxial Fatigue Strength to Notched specimens made of 40CrMoV13.9

American Journal of Engineering and Applied Sciences ◽

10.3844/ajeassp.2016.1269.1291 ◽

2016 ◽

Vol 9 (4) ◽

pp. 1269-1291 ◽

Cited By ~ 3

Author(s):

Filippo Berto ◽

Abedin Gagani ◽

Raffaella Aversa ◽

Relly Victoria V. Petrescu ◽

Antonio Apicella ◽

...

Keyword(s):

Fatigue Strength ◽

Multiaxial Fatigue ◽

Notched Specimens

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Corrosion fatigue strength of ship structural steel butt welded joints in synthetic sea-water

Welding International ◽

10.1080/09507119909446514 ◽

1999 ◽

Vol 13 (5) ◽

pp. 385-391

Author(s):

Y Kobayashi ◽

Y Tanaka ◽

H Goto ◽

K Matsuoka ◽

Y Motohashi

Keyword(s):

Fatigue Strength ◽

Structural Steel ◽

Corrosion Fatigue ◽

Welded Joints ◽

Sea Water ◽

Corrosion Fatigue Strength

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Influence Of Large Non-Metallic Inclusions On Bending Fatigue Strength Hardened And Tempered Steels

Advances in Materials Science ◽

10.1515/adms-2015-0013 ◽

2015 ◽

Vol 15 (3) ◽

pp. 33-40

Author(s):

T. Lipiński ◽

A. Wach ◽

E. Detyna

Keyword(s):

Fatigue Strength ◽

Structural Steel ◽

Treatment Options ◽

Fatigue Tests ◽

Relative Volume ◽

Heat Processing ◽

Industrial Plant ◽

Boron Steel ◽

Metallic Inclusions ◽

Steel Sections

Abstract The article discusses the effect of large oxide impurities (a diameter larger than 10 μm in size) on the fatigue resistance of structural steel of high purity during rotary bending. The study was performed on 7 heats produced in an industrial plant. The heats were produced in 140 ton electric furnaces. All heats were desulfurized. The experimental material consisted of semi-finished products of high-grade, carbon structural steel with: manganese, chromium, nickel, molybdenum and boron. Steel sections with a diameter of 18 mm were hardened from austenitizing by 30 minutes in temperature 880°C and tempered at a temperature of 200, 300, 400, 500 and 600°C for 120 minutes and air-cooled. The experimental variants were compared in view of the heat treatment options. Fatigue tests were performed with the use of a rotary bending machine at a frequency of 6000 cpm. The results were statistical processed and presented in graphic form. This paper discusses the results of the relative volume of large impurities, the fatigue strength for various heat processing options.

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