Development of fatigue failure of low-carbon sheet steel at room and low temperatures

Yarema, S. Ya.; Krasovskii, A. Ya.; Ostash, О. P.; Stepanenko, V. A.

doi:10.1007/bf01532476

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…(A) Sub‐zero temperatures ∆K th data extracted from literature and (B) normalised average ∆K th change at sub‐zero temperatures from 50 datasets reported in literature 52–75 [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Assessment Of the Results Using Data Of Materials Fatiguementioning

confidence: 99%

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Braun

Fischer²,

Fricke

et al. 2020

Fatigue Fract Eng Mat Struct

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Within stress-based fatigue assessment concepts, causes that do not influence the fatigue stress parameters, such as temperature, can only be accounted for by means of modification factors. The strain energy density (SED) method allows to account for changing material support effects and Young's modulus with temperature directly. Thus, in this study, a concept is presented to extend the SED method for fatigue assessment of welded joints at sub-zero temperatures. For this purpose, fatigue test results of welded joints made from normal and high-strength structural steel are assessed in the range of 20 C down to −50 C. The results are evaluated based on the formula that is used to derive the SED control radii of welded joints and compared with results of studies on SED-based assessment of notched components at high temperatures. From the estimates of the control radii, a temperature modification function for SED is derived for design purposes.

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Section: Assessment Of the Results Using Data Of Materials Fatiguementioning

confidence: 99%

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Braun

Fischer²,

Fricke

et al. 2020

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The intersection of FCG curves for room and low temperatures is presented in Figure 14. A fatigue crack growth rate (da/dN) versus stress intensity factor range (∆K) curve for a low-carbon steel above and below the FTT, based on Yarema et al [56] and taken from Braun [32].…”

Section: Relation Between the Ftt And The Dbttmentioning

confidence: 99%

“…In actual large scale structures, residual stresses are typically not constant. This effect will therefore alte A fatigue crack growth rate (da/dN) versus stress intensity factor range (∆K) curve for a low-carbon steel above and below the FTT, based on Yarema et al [56] and taken from Braun [32].…”

Section: Relation Between the Ftt And The Dbttmentioning

confidence: 99%

Relation between the Fatigue and Fracture Ductile-Brittle Transition in S500 Welded Steel Joints

Sallaba

Rolof

Ehlers

et al. 2022

Metals

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The formation and propagation of cracks occur through irreversible dislocation movements at notches, material defects, and grain boundaries. Since this process is partly thermally controlled, the resistance to dislocation movements at low temperatures increases. This slows both fatigue initiation and fatigue crack propagation. From recent experimental data, it can be seen that fatigue crack growth is accelerated below the fatigue transition temperature (FTT) that correlates with the ductile-brittle transition temperature (DBTT) found by well-known fracture mechanics tests, i.e., Charpy impact, fracture toughness, and CTOD. Hence, this study investigates the relation between FTT and DBTT in S500 high-strength steel base material and welded joints at low temperatures using fatigue crack growth, fracture toughness tests as well as scanning electron microscopy. From the tests, an almost constant decrease in fatigue crack propagation rate is determined with decreasing test temperature even below the DBTT. At −100 °C, the fatigue crack propagation rate is about half of the rate observed at room temperature for both base material and weld metal.

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A structural concept of the fatigue limit of structural alloys

Romaniv

1986

Mater Sci

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Development of fatigue failure of low-carbon sheet steel at room and low temperatures

Cited by 12 publications

References 11 publications

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Relation between the Fatigue and Fracture Ductile-Brittle Transition in S500 Welded Steel Joints

A structural concept of the fatigue limit of structural alloys

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