In situ observation of fatigue crack retardation in banded ferrite–pearlite microstructure due to crack branching

Korda, Akhmad A.; Mutoh, Yoshiharu; Miyashita, Yukio; Sadasue, Teruki; Mannan, S.L.

doi:10.1016/j.scriptamat.2006.02.025

Cited by 85 publications

(37 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, it was not easy for the transgranular cracks to become perpendicular to the cementite lamellae. At high stress intensity factor range, the fatigue cracks generally propagated along the ferrite-pearlite interfaces weak region [21,23]. As presented in Fig.…”

Section: Fatigue Step Formation Mechanismmentioning

confidence: 85%

“…Regarding the ferrite-pearlite steels, the pearlite was a hard phase, whereas the ferrite was a soft phase. The differences in the local properties due to two different phases with various stiffness values generally affected the fatigue crack growth behavior of the materials [21]. Hussain et al [22] reported that the pearlite band captured the crack propagation during the fatigue test.…”

Section: Fatigue Step Formation Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Study on fatigue failure mechanism at various temperatures of a high-speed railway wheel steel

Fang

Zhao

Liu

2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

Section: Fatigue Step Formation Mechanismmentioning

confidence: 85%

Section: Fatigue Step Formation Mechanismmentioning

confidence: 99%

Study on fatigue failure mechanism at various temperatures of a high-speed railway wheel steel

Fang

Zhao

Liu

2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…Hard phases in dual‐phase steels, like martensite, could deflect crack paths and play an important role in retarding the FCG rate . Here we found that the FCG resistance of the B/M dual‐phase EA4T steel increases first and then decreases with the increase in V B (Figure ) corresponding to an decrease in V M .…”

Section: Discussionmentioning

confidence: 51%

Optimal Bainite Contents for Maximizing Fatigue Cracking Resistance of Bainite/Martensite Dual‐Phase EA4T Steels

Chen

Zhang

Zeng

et al. 2018

steel research int.

View full text Add to dashboard Cite

Fatigue crack propagation behavior of bainite/martensite dual‐phase EA4T steels with four different volume fractions of bainite ranging from 21% to 70% is investigated. The results indicate that the bainite/martensite dual‐phase steel specimens with the volume fraction of bainite of 49–60% have the higher resistance to fatigue crack growth than the others. The coupled contributions of plasticity‐induced crack closure and crack deflection to the higher fatigue crack growth resistance is estimated. A model related to the plastic zone size and the roughness of the fracture surface is proposed to evaluate the optimal volume fraction of bainite in the dual‐phase steels.

show abstract

“…In a high DK regime, severe crack branching also was observed for the B1 and B2 specimens. [22,23] The effect of hard phases hindering crack propagation could not be visualized easily as those shown in Figures 6(b) and 6(c) because of the smaller size of hard phases (MA and pearlitic islands for the B1 and B2 specimens). However, close examination of Figures 7 and 8 suggested that MA particles and small pearlitic islands acted as barriers for crack propagation in intermediate and high DK regimes and acted less significantly in the low DK regime.…”

Section: Resultsmentioning

confidence: 99%

Effect of Microstructure on Fatigue Crack Propagation and S–N Fatigue Behaviors of TMCP Steels with Yield Strengths of Approximately 450 MPa

Kim

Kwon

Lee

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

In the present study, stress (S) -number of cycles to failure (N) (S-N) fatigue and fatigue crack propagation behaviors of three thermomechanical control process steels with different microstructures but similar yield strengths of approximately 450 MPa were investigated. The P + F steel was predominately pearlite plus ferrite, whereas B1 and B2 steels were both bainitic steels with martensite-austenite and pearlitic islands. Despite the significant difference in microstructural features, the resulting fatigue crack propagation rates and near-threshold DK values were comparable with each other. The hard phases, such as pearlite colonies in the P + F specimen, tended to affect fatigue crack propagation behavior in a similar manner, and severe crack branching was observed in intermediate and high DK regimes. Despite similar fatigue crack propagation rates and near-threshold DK values, the resistance to S-N fatigue was substantially different for each steel specimen. Depending on fatigue crack initiators, such as the ferrite/pearlite phase boundaries for the P + F specimens and the cracked martensite-austenite and/or small pearlitic islands for the bainitic specimens, the cycles for crack initiation varied greatly.

show abstract

In situ observation of fatigue crack retardation in banded ferrite–pearlite microstructure due to crack branching

Cited by 85 publications

References 14 publications

Study on fatigue failure mechanism at various temperatures of a high-speed railway wheel steel

Study on fatigue failure mechanism at various temperatures of a high-speed railway wheel steel

Optimal Bainite Contents for Maximizing Fatigue Cracking Resistance of Bainite/Martensite Dual‐Phase EA4T Steels

Effect of Microstructure on Fatigue Crack Propagation and S–N Fatigue Behaviors of TMCP Steels with Yield Strengths of Approximately 450 MPa

Contact Info

Product

Resources

About