Effect of Strengthening Mechanism on Fatigue Properties of Dual Phase Sheet Steel

Kurita, Masato; Toyama, Kenzo; Nomura, S.; Kunishige, Kazutoshi

doi:10.2355/tetsutohagane1955.81.11_1091

Cited by 11 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13 shows the TEM micrograph near the surface of the M1 specimen after a torsional fatigue test. It shows the typical dislocation cell structure similar to that observed in a soft ferrite matrix after fatigue testing in previous studies (5) (7) . Figure 14 shows da/dN-∆K curves of the FP2, FM, and M4 specimens.…”

Section: Methodssupporting

confidence: 76%

“…The effect of microstructure on the fatigue endurance of steel has been intensively investigated. Kurita et al examined the effect of strengthening mechanisms on the fatigue endurance of F+P and F+M-based microstructures under tension-compression axial loading (4) (5) . Wang et al studied the effect of martensite volume fraction and morphology on the fatigue crack growth rate of a F+M microstructure under tension-zero cycling (6) (7) .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Microstructure on Torsional Fatigue Endurance of Martensitic Carbon Steel

Toyoda¹,

Ishiguro²,

Kawabata³

et al. 2009

JMMP

View full text Add to dashboard Cite

The microstructural influence of martensitic carbon steel on torsional fatigue endurance was investigated, taking into consideration the application of high strength steel electric resistance welded (ERW) tubes to automotive structural parts. The chemical composition of the base steel alloy was 0.1-0.2%C-0.2-1.5%Si-1.3-1.9%Mn-0.01%P-0.001%S-(Cr,Mo,Ti,Nb,B). Laboratory vacuum-fused ingots were hot-rolled, heated to 1023 or 1223 K in a salt bath, and then waterquenched and tempered at 473 K. Consequently, three types of microstructure, martensite (M), martensite and ferrite (M+F), and ferrite and pearlite (F+P), were prepared. Fully reversed torsional fatigue testing was conducted with 6 mm diameter round bar specimens. Torsional fatigue endurance was found to monotonously increase with increases in the tensile strength of the specimen from 540 to 1380 MPa. The martensitic single structure and the M+F dual-phase structure showed a similar level of fatigue endurance at a tensile strength of approximately 950 MPa. However, fatigue micro-crack morphology varied slightly between them. At the surface of the M+F specimen, many small cracks were observed in addition to the main crack. Conversely, in the martensitic specimen, these small cracks were rarely observed. ∆K decreasing/increasing crack growth testing with compact tension (CT)-type specimens was also conducted. Based on these experimental results, the effect of microstructure and stress level on the initiation/propagation cycle ratio is discussed. In addition to fatigue properties, some practical properties, such as low-temperature toughness and hydrogen embrittlement resistance, were also evaluated in view of actual applications for automotive structural parts.

show abstract

Section: Methodssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on Torsional Fatigue Endurance of Martensitic Carbon Steel

Toyoda¹,

Ishiguro²,

Kawabata³

et al. 2009

JMMP

View full text Add to dashboard Cite

show abstract

“…Hasegawa et al 4) reported that the plastic strain of martensite in tensile deformation increases proportionally with martensite volume fraction, thereby increasing the tensile strength. 5) Kurita et al 6) reported that the fatigue fracture of DP steel strongly correlates with martensite deformation. Several other researchers have reported that the grain size, shape, and spatial distribution of martensite determine the strength and ductility of DP steels.…”

Section: Analysis Of Nano-hardness Distribution Near the Ferritemartensite Interface In A Dual Phase Steel With Factorization Of Its Scatmentioning

confidence: 99%

Analysis of Nano-hardness Distribution Near the Ferrite-martensite Interface in a Dual Phase Steel with Factorization of Its Scattering Behavior

et al. 2021

View full text Add to dashboard Cite

“…Also, a lot of researches goaled to a better understanding of the excellent mechanical properties of dual-phase steels [7][8][9][10][11][12]. However, there are still some controversies over the mechanisms contributing to the very good mechanical properties of dualphase steels [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Surface Characteristics of Dual Phase Steel by Electron Backscatter Diffraction (EBSD) Technique

Jeong¹,

Ryou²,

Lee³

2014

Transactions on Electrical and Electronic Materials

View full text Add to dashboard Cite

Dual phase steels have a microstructure comprising of a polygonal ferrite matrix together with dispersed islands of martensite. There are clear differences between the image quality (IQ) map of the dual phase and the corresponding ferritic/pearlitic structures, both in the as-heat treated and cold rolled conditions. Electron backscatter diffraction (EBSD) techniques were used to study the evolution substructure of steel due to plastic deformation. The martensiteferrite and ferrite-pearlite interfaces were observed. The interface can be a source of mobile dislocations which the bands seem to originate from the martensite islands. In particular, the use of image quality is highlighted.

show abstract

Effect of Strengthening Mechanism on Fatigue Properties of Dual Phase Sheet Steel

Cited by 11 publications

References 3 publications

Effect of Microstructure on Torsional Fatigue Endurance of Martensitic Carbon Steel

Effect of Microstructure on Torsional Fatigue Endurance of Martensitic Carbon Steel

Analysis of Nano-hardness Distribution Near the Ferrite-martensite Interface in a Dual Phase Steel with Factorization of Its Scattering Behavior

A Study on the Surface Characteristics of Dual Phase Steel by Electron Backscatter Diffraction (EBSD) Technique

Contact Info

Product

Resources

About