Structure–property optimization of ultrafine-grained dual-phase steels using a microstructure-based strain hardening model

Delincé, Marc; Bréchet, Y.; Embury, J.D.; Geers, M.G.D.; Jacques, Pascal; Pardoen, Thomas

doi:10.1016/j.actamat.2006.11.029

Cited by 212 publications

(90 citation statements)

References 41 publications

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“…Besides other attempts, [4][5][6] one approach to improve the strain hardenability and hence the industrial applicability is the introduction of martensite as a second hard phase into the soft ferrite matrix. 7,8) The enhanced tensile properties of such dual phase steels can be associated with strain gradient plastic effects 9,10) due to a high dislocation density in the interface area between martensite and ferrite. These dislocations are regarded as geometrically necessary dislocations.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Grained Ferrite/Martensite Dual Phase Steel Fabricated by Large Strain Warm Deformation and Subsequent Intercritical Annealing

2008

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Section: Introductionmentioning

confidence: 99%

Ultrafine Grained Ferrite/Martensite Dual Phase Steel Fabricated by Large Strain Warm Deformation and Subsequent Intercritical Annealing

2008

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“…Principally, the mechanical behavior of martensite is described either with phenomenological polynomial law 6) or it is reduced to an elastic or an elastic-perfectly plastic law. 7) However, recently a Continuum Composite Approach (CCA) was proposed to predict the complete tensile curves of as-quenched martensitic steels. 8) The general idea of this approach is to consider martensite as a composite of elastic-perfectly plastic phases in interaction.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Modeling of Manganese Effect on Strength and Strain Hardening of Martensitic Carbon Steels

et al. 2013

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Carbon and manganese combined effect on the mechanical behavior of martensite was characterized and analyzed using literature and new experimental data of various carbon-manganese steels. A synergy effect of carbon and manganese on the martenstite strength and strain hardening was detected and was then taken into account in a specific way in the simplified model, based on a Continuous Composite Approach. Model was adjusted with only one fitting parameter and the obtained results are in good agreement with experimental stress-strain curves.

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“…La matriz ferrítica blanda es generalmente continua, proveyendo una excelente ductilidad. Cuando estos aceros se conforman, la deformación se concentra en la fase ferrítica blanda, rodeando las "islas" de martensita, generando un alto coeficiente de endurecimiento por deformación para estos materiales [1,3,4]. Esto, sumando a un excelente alargamiento a rotura, provee a estos aceros de una mayor resistencia a la tracción que los aceros convencionales con similar tensión de fluencia.…”

Section: Introductionunclassified

“…A su vez, el C ejerce también un efecto endurecedor de la martensita. El tamaño de grano de la matriz ferrítica es otro de los parámetros que controlan el endurecimiento y la buena tenacidad de estos materiales [3], por ello la presencia de microaleantes V, Nb, Ti (~0,030%) es favorable a las propiedades finales de los aceros DP. Estos aceros de última generación, se aplican en partes estructurales, especialmente en la industria automotriz, presentando una alta resistencia mecánica del orden de 500 a 1000 MPa, manteniendo muy buena conformabilidad.…”

Section: Introductionunclassified

Soldadura de aceros dual phase en chapa fina: GMAW, PAW y RSW

2011

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ResumenLos aceros Dual Phase (DP) han encontrado recientemente una fuerte aplicación en elementos estructurales en la industria automotriz, debido a la necesidad de disminuir peso. La soldadura de estos materiales cobra particular importancia considerando su aplicación estructural y los procesos relacionados en su fabricación. En particular la soldadura de resistencia por punto (RSW) y semiautomática con alambre macizo y protección gaseosa (GMAW) RSW, GMAW and PAW. In Palabras clave: aceros Dual Phase, PAW, GMAW, RSW, ZAC Abstract: Dual Phase steels (DP) have been used recently as an interesting option for structural elements, specialy in automotive industry, due to weight reduce requirements. Welding of these materials becomes particularly important considering their application as structural elements and the related manufacturing methods. In particular resistance spot welding (RSW) and gas metal arc welding (GMAW) are widely used in the automotive manufacturing. The plasma arc welding (PAW) has the charateristic, within arc welding processes, to involve the highest energy density, being this parameter interesting to certain applications on automative industry (tailor welded blanks). The objective of this work is to study the microstructural evolution and properties of welded DP steels by mean of

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Structure–property optimization of ultrafine-grained dual-phase steels using a microstructure-based strain hardening model

Cited by 212 publications

References 41 publications

Ultrafine Grained Ferrite/Martensite Dual Phase Steel Fabricated by Large Strain Warm Deformation and Subsequent Intercritical Annealing

Ultrafine Grained Ferrite/Martensite Dual Phase Steel Fabricated by Large Strain Warm Deformation and Subsequent Intercritical Annealing

Characterization and Modeling of Manganese Effect on Strength and Strain Hardening of Martensitic Carbon Steels

Soldadura de aceros dual phase en chapa fina: GMAW, PAW y RSW

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