Influence of ferrite fraction within martensite matrix on fatigue crack propagation: An experimental verification with dual phase steel

Idris, Rubia; Prawoto, Yunan

doi:10.1016/j.msea.2012.05.085

Cited by 34 publications

(24 citation statements)

References 25 publications

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“…On the other hand, the effect of RA on the fatigue behaviour of AHSSs has been a controversial issue for long time. Some authors have reported that in steels with high volume fraction of RA, its transformation into martensite during cycling will accelerate crack propagation and therefore decrease fatigue life [15][16][17][18][19]. In such cases, the newly formed martensite may provide a path for fast crack propagation [1].…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructure on fatigue behavior of advanced high strength steels produced by quenching and partitioning and the role of retained austenite

Diego-Calderón

Calvillo

Lara

et al. 2015

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Effect of microstructure on fatigue behavior of advanced high strength steels produced by quenching and partitioning and the role of retained austenite

Diego-Calderón

Calvillo

Lara

et al. 2015

Materials Science and Engineering: A

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“…The average cyclic stress amplitude Δ σ bending under RBF loading can be considered 1/2 of Δ σ max which is equal to Δ σ T‐C under TCF loading (see an inset of Figure ). Then, crack length a 1 can be obtained by Equation , as shown in Figure , S red ≈ S blue

\int_{a_{0}}^{a_{1}} \frac{1}{{false(\overset{true¯}{Δ σ_{bending}} false)}^{m}} a^{- \frac{m}{2}} d a = \int_{a_{0}}^{a_{2}} \frac{1}{{false(Δ σ_{T - C} false)}^{m}} a^{- \frac{m}{2}} d a

m is taken as 3.5, refering to the value in the literature . Crack length after the second stage of crack propagation under TCF loading is a 2 ≈ 1 mm, shown by the white dotted line in Figure a.…”

Section: Discussionmentioning

confidence: 98%

Evaluation of the Low‐Cycle Fatigue Life of Thin Dual‐Phase Steel Sheets for Automobiles Using Miniature Specimens

Zhang

Song

et al. 2019

steel research int.

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Using miniature 95 μm‐thick cantilever beam specimens, the fatigue life of a thin dual‐phase steel sheet is evaluated under deflection‐controlled repeatedly bending fatigue (RBF) loading and compared with that of 2 mm‐thick sheet specimens under strain‐controlled uniaxial tension‐compression fatigue (TCF) loading. The results indicate that the fatigue lives of the two types of specimens subjected to the respective two sorts of fatigue testing methods are almost identical in the low‐cycle fatigue (LCF) regime, whereas the fatigue life of the 95 μm‐thick foil specimens is much lower than that of the 2 mm‐thick sheet specimens in the high‐cycle fatigue regime. The fatigue performance and fracture mechanism under the two types of fatigue loadings are discussed and the application of this method using miniature cantilever beam specimens under RBF loading is further explored. The finding provides a potential way to obtain credible LCF data for vehicle steel sheets using miniature cantilever beam foils under RBF loading instead of TCF loading which becomes more difficult for the very thin steel sheets with a thickness less than 2 mm.

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“…Several authors [8][9][10][11] conclude that the increase of the ferrite phase increases the fatigue crack growth velocity; thus, a high martensite content is favourable for this type of steel under fatigue loads. While Idris et al [12] observed the opposite behaviour; increasing the martensite content rises the fatigue crack growth velocity.…”

Section: Introductionmentioning

confidence: 92%

Fatigue Crack Growth and Fracture Toughness in a Dual Phase Steel: Effect of Increasing Martensite Volume Fraction

Velasquez¹,

Rodríguez²,

Tovar³

et al. 2020

IJAME

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Crack growth resistance in dual-phase steel was studied. The dual phase steel microstructure was modified through heat treatments to increase the martensite volume fraction from 10% to 40%. The as-received and heat-treated samples were evaluated using a uniaxial tensile test, fatigue crack growth test, and fracture toughness test. Extended Finite Element Method (XFEM) was used to simulate the crack growth in compact tension test specimens. The results showed that an increase in martensite volume fraction is an effective way to increase the fracture resistance under different load conditions, quasistatics and dynamic, increasing the fracture toughness, tensile strength and fatigue resistance of the heat-treated material. Presence of a highest content of martensite results in formation of an important number of secondary cracks during the fatigue crack growth, which slow down the crack propagation. Moreover, martensite generates a crack closure over the crack tip, making the propagation difficult due to the irregularities caused by the crack growth on the martensite. Finally, the computational load-displacement curves are in good agreement with the experimental data.

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Influence of ferrite fraction within martensite matrix on fatigue crack propagation: An experimental verification with dual phase steel

Cited by 34 publications

References 25 publications

Effect of microstructure on fatigue behavior of advanced high strength steels produced by quenching and partitioning and the role of retained austenite

Effect of microstructure on fatigue behavior of advanced high strength steels produced by quenching and partitioning and the role of retained austenite

Evaluation of the Low‐Cycle Fatigue Life of Thin Dual‐Phase Steel Sheets for Automobiles Using Miniature Specimens

Fatigue Crack Growth and Fracture Toughness in a Dual Phase Steel: Effect of Increasing Martensite Volume Fraction

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