Fatigue crack propagation behavior of Fe24Mn steel weld at 298 and 110 K

Jeong, Daeho; Lee, Soon-Gi; Seo, Insik; Yoo, Jang-Yong; Kim, Sangshik

doi:10.1007/s12540-015-1004-x

Cited by 22 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As expected, the increase in R ratio from 0.1 to 0.7 increased the FCP rates of each specimen, particularly in low ΔK regime. The effect of R ratio on the FCP behavior is mainly attributed to crack closure effects, in which crack faces contact each other with the crack closure stress intensity factor, K cl lower than the minimum applied stress intensity factor, K min (Starke and Williams 1989;Jeong et al 2015a). It was noted in Fig.…”

Section: Methodsmentioning

confidence: 90%

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

Jeong

Kwon

Goto

et al. 2017

Int J Mech Mater Eng

Self Cite

View full text Add to dashboard Cite

Background: The effect of β annealing on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of Ti64 alloy were examined, and the results were compared to those of mill-annealed counterpart. Methods: The tensile tests, stress-controlled HCF tests, and FCP tests were conducted, and the fractographic and micrographic analyses were performed before and after the tests. Results: The β-annealed Ti64 specimen showed inferior HCF properties as compared to the mill-annealed counterpart, as a result of lower yield strength. On the other hand the resistance to FCP of β-annealed Ti64 specimen was higher than that of mill-annealed counterpart in low and intermediate ΔK regime. Conclusions: Relatively easy fatigue crack initiation at the colony boundaries of β-annealed Ti64 specimen reduce the resistance to HCF. The resistance to FCP of β-annealed Ti64 specimen increased significantly particularly in low ΔK regime along with severe crack branching and deflection.

show abstract

Section: Methodsmentioning

confidence: 90%

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

Jeong

Kwon

Goto

et al. 2017

Int J Mech Mater Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…(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

View full text Add to dashboard Cite

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.

show abstract

“…MGb .................. (7) where ρ L is the dislocation density obtained by finish rolling at 850 or 800°C, and ρ H is the dislocation density obtained by finish rolling at 900°C. ρ H is assumed to be ~10 11 m − 2 , a typical value for annealed or completely recrystallized metals.…”

Section: Steel Gradesmentioning

confidence: 99%

“…5,6) But the development of hot rolled high-Mn TWIP steels is limited by their relatively low yield strength, even with a high Mn or chromium (Cr) content. [7][8][9] It is well known that the addition of microalloying elements such as Nb, V and Ti can improve the strength of steels by means of both grain refinement and precipitation hardening. In particular, vanadium microalloying is believed to be more suitable for high Mn TWIP steels with medium or high carbon contents, as compared to niobium and titanium microalloying.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of a Hot-rolled High Manganese TWIP Steel Containing 0.3%V

Sun

Wang

2020

ISIJ Int.

View full text Add to dashboard Cite

In this paper, the microstructure, precipitates and mechanical properties of a 0.3%V-alloying high Mn austenitic TWIP steel after hot rolling and aging treatment were investigated, aimed to improve the yield strength of high Mn austenitic steel. Experimental results showed that an elongated and unrecrystallized grain structure could be obtained at a finish rolling temperature of 850°C or below in 0.3V steel. The amount of VC precipitates was very small and most vanadium remained in solution after hot rolling. Therefore, the solute drag effect of dissolved vanadium rather than the Zener pinning effect of VC precipitates was mainly responsible for the inhibition of recrystallization. The yield strength increase of 0.3V steel with deceasing finish rolling temperature was much more remarkable than that of V-free steel. Quantifying possible strengthening mechanisms revealed that most of the YS increase was due to the dislocation strengthening in 0.3V steel. The aging treatment for 30 min promoted the precipitation of VC, but the precipitation amount was still much less than the equilibrium precipitation amount. The comparative analysis on precipitation kinetics of VC in high Mn and low Mn steels indicated that the former had a more sluggish precipitation rate than the latter. This result was further analyzed in terms of the effect of Mn on the solubility product of VC in austenite.

show abstract

Fatigue crack propagation behavior of Fe24Mn steel weld at 298 and 110 K

Cited by 22 publications

References 31 publications

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

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

Microstructure and Mechanical Properties of a Hot-rolled High Manganese TWIP Steel Containing 0.3%V

Contact Info

Product

Resources

About