Reason for high strength and good ductility in dual phase steels composed of soft ferrite and hard martensite

Terada, Daisuke; Ikeda, Gosuke; Park, Myeong-heom; Shibata, Akinobu; Tsuji, Nobuhiro

doi:10.1088/1757-899x/219/1/012008

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…Furthermore, plastic deformation initially surrounds martensite grains before eventually spreading through them as the deformation process increases. 12 According to Bartz et al's research, martensite distorts the fracture trajectory and disrupts the homogeneity of the deformation process. Furthermore, thick grains promote crack growth, while grain crystallographic orientation changes inhibit the spread of cracks.…”

Section: Introductionmentioning

confidence: 99%

“…Concerning the stress field and the damage accumulation in the microstructure, several researchers mention that the deformation is not uniform due to the martensite distribution, interconnection, and volume fraction, concentrating mainly on the ferrite grains. Furthermore, plastic deformation initially surrounds martensite grains before eventually spreading through them as the deformation process increases 12 . According to Bartz et al's research, martensite distorts the fracture trajectory and disrupts the homogeneity of the deformation process.…”

Section: Introductionmentioning

confidence: 99%

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Martensite content effect on fatigue crack growth and fracture energy in dual‐phase steels

Avendaño‐Rodríguez,

Rodriguez‐Baracaldo,

Weber

et al. 2023

Fatigue Fract Eng Mat Struct

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The effect of different microstructural factors on crack growth and fatigue fracture mechanisms in dual‐phase (DP) steels has yet to be fully understood. The present research examines the relationship between crack growth, microstructure, and fracture mechanisms. The samples were intercritically annealed at different temperatures to produce three different martensite volume fractions (MVFs). The results show that the mechanical incompatibility of ferrite and martensite promotes continuous crack tip deflection. MVF increases are associated with elevated fracture tortuosity, more significant fracture energy surface formation, and higher Paris law exponent m values. The interaction of the microstructure with the crack tip, the strain energy density, and the softening caused by secondary microcrack propagation are all illustrated by Electron backscatter diffraction (EBSD) maps. Increasing MVF promotes slow crack growth and a fracture energy increase of 22.9% between the as‐received and heat‐treated steels.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Martensite content effect on fatigue crack growth and fracture energy in dual‐phase steels

Avendaño‐Rodríguez,

Rodriguez‐Baracaldo,

Weber

et al. 2023

Fatigue Fract Eng Mat Struct

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“…For the dualphase treated steel, increasing the holding time makes volume fraction of martensite increase, which leads to an increase in tensile strength and makes the elongation sacrificed. In another study, Terada et al [8] created two types of martensite microstructures for the 0.087C-0.79Si-1.77Mn; one of them was networked martensite by using intercritical annealing and the other was islanded martensite by austenitizing and cooling to intercritical annealing temperature, then all of them were quenched in water. e cored result was that the networked martensite made the steel have a better combination of strength and ductility compared to the isolated martensite because the partition of strain between phases in networked martensite microstructure was less.…”

Section: Introductionmentioning

confidence: 99%

Impact of Cold‐Rolling and Heat Treatment on Mechanical Properties of Dual‐Phase Treated Low Carbon Steel

Long

Hien

Thành

et al. 2020

Advances in Materials Science and Engineering

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The low carbon steel has good ductility that is favorable for forming process, but its low strength leads to limiting their application for forced structures. This paper studied improving strength of low-carbon steel via rolling deformation and dual-phase treatment. The results showed that the dual-phase treated steel had a combination of high strength and good ductility; its tensile ultimate strength reached 740 MPa with elongation at fracture of over 15%, while that of the cold-rolled steel only reached 700 MPa with elongation at fracture of under 3%. Based on the obtained results, relationships between mechanical properties and dual-phase processing parameters were established to help users choose suitable-processing parameters according to requirements of products.

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Recrystallization, grain growth and austenite formation in cold rolled steels during intercritical annealing

Poyraz

Ögel

2020

Journal of Materials Research and Technology

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Reason for high strength and good ductility in dual phase steels composed of soft ferrite and hard martensite

Cited by 8 publications

References 6 publications

Martensite content effect on fatigue crack growth and fracture energy in dual‐phase steels

Martensite content effect on fatigue crack growth and fracture energy in dual‐phase steels

Impact of Cold‐Rolling and Heat Treatment on Mechanical Properties of Dual‐Phase Treated Low Carbon Steel

Recrystallization, grain growth and austenite formation in cold rolled steels during intercritical annealing

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