Fatigue crack propagation in intercritically tempered Fe-9Ni-0.1C and Fe-4Mn-0.15C

Choi, Heesoo; Schwartz, L. H.

doi:10.1007/bf02670447

Cited by 7 publications

(2 citation statements)

References 15 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

“…9Ni steels are generally processed by quenching and tempering (QT), double normalizing and tempering (NNT), or quenching, lamellaring and tempering(QLT), among which QT treatment is relatively simple and good mechanical properties could be obtained [3,4]. Previous researches showed that a few amount of reversed austenite could be obtained in QT-treated 9Ni steel, but the reversed austenite is sensitive to the tempering temperature [4,5]. It is well known that the reversed austenite accounts for the high toughness, especially the cryogenic impact toughness, which has been effectively utilized in many kinds of steels, such as maraging steel, TRIP steel and 9Ni steel [6,7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties in QT-Treated 9Ni Steel

Zhao²,

Pan

et al. 2012

AMR

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Microstructure and mechanical properties in QT-Treated 9Ni steel were investigated. The detail microstructures were observed by optical microscope (OM) and transmission electron microscope (TEM). The volume fraction of austenite was estimated by XRD. Tensile test at room temperature and Charpy-V-Notch (CVN) impact test at -196°C were carried out. The results showed that the microstructure of QT-treated 9%Ni steel was composed of tempered martensite and reversed austenite. The brittle cementite was absorbed gradually by the increasing reversed austenite as the tempering temperature increased. The optimum tempering temperature range was 560°C~580°C. The reversed austenite could improve the cryogenic toughness of 9Ni steel through the combination of the scavenging effect and the TRIP effect.

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Fatigue crack growth behavior in inconel 706 at 297 K and 4.2 K

Liaw

Logsdon

1988

Acta Metallurgica

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Fatigue crack propagation in intercritically tempered Fe-9Ni-0.1C and Fe-4Mn-0.15C

Cited by 7 publications

References 15 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

Microstructure and Mechanical Properties in QT-Treated 9Ni Steel

Fatigue crack growth behavior in inconel 706 at 297 K and 4.2 K

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