Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels

Atreya, Vibhor; Dokkum, Jan Steven Van; Bos, C.; Santofimia, M.J.

doi:10.1016/j.matdes.2022.110805

Cited by 17 publications

(3 citation statements)

References 45 publications

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“…By contrast, a dual-phase microstructure composed of a soft ferrite matrix and a hard second phase (martensite) was formed in the DQA steel (Figure 2e) [23]. Austenite reverts during the intercritical annealing process and transforms into martensite or bainite after cooling, depending on the chemical composition of the HSLA steels and the cooling rate [24].…”

Section: Microstructurementioning

confidence: 99%

“…Therefore, achieving good deformability and low-temperature toughness while maintaining high strength has become an increasingly important issue for HSLA steels [21,22]. Among HSLA steels, dual-phase steels, which are typically fabricated via intercritical annealing, can offer a good combination of strength, deformability, and low-temperature toughness due to the specific microstructure with ferrite and martensite [23][24][25]. In addition to these characteristics, they exhibit a high rate of work hardening, a low yield-to-tensile strength ratio, and continuous yielding behavior.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Heat Treatment on Microstructure and Mechanical Properties of Direct-Quenched Fe-0.06C-0.2Si-2.0Mn Steel

Shin,

Oh,

Hwang

2023

Metals

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In this study, the effect of subsequent heat treatment applied to high-strength low-alloy steel (HSLA) on the structure–property relationships was investigated. Tempering and intercritical annealing processes are introduced to elucidate the influence of subsequent heat treatment on mechanical properties of direct-quenched Fe-0.06C-0.2Si-2.0Mn steel from a microstructural perspective. The tempering process results in a typical tempered martensite with uniformly dispersed cementite, whereas the intercritical annealing process forms a dual-phase microstructure composed of soft ferrite and hard martensite for the direct-quenched steel. In the intercritical annealed steel, a number of mobile dislocations at the interphase (martensite/ferrite) boundary significantly decrease the yield strength, and the large difference in strength between ferrite and martensite enhances work hardening. Charpy V-notch impact test results indicate that the tempering and intercritical annealing processes improved the absorbed energy by more than 100 J compared to the direct-quenched steel at room temperature, and at −50 °C, the intercritically annealed steel exhibited the highest absorbed energy of approximately 140 J. Additionally, the high fraction of high-angle grain boundaries and fine grains of the intercritically annealed steel increase the resistance to cleavage crack propagation, thereby reducing the ductile-to-brittle transition temperature.

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Section: Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on Microstructure and Mechanical Properties of Direct-Quenched Fe-0.06C-0.2Si-2.0Mn Steel

Shin,

Oh,

Hwang

2023

Metals

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“…The austenite phase during the inter-critical quenching transforms into martensite due to the high cooling rate. This transformation is known as a displacive transformation[29].…”

mentioning

confidence: 99%

Microstructural and mechanical properties of dissimilar SMAW process joints of DP Steels obtained by intercritical heat treatment from AISI 1010 steel

LAROUI,

Chegroune,

Hariti

et al. 2023

Preprint

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Dual phase steel is a kind of advanced high strength steel used in automotive industry to reduce a fuel consumption. The present study assesses the microstructural and mechanical behavior of a dissimilar butt-welded dual-phase steel by Shielded Metal Arc Welding process. The ferrite phase with variable martensite fraction from 27–70% was obtained by water quenching at different inter-critical temperatures from a plate carbon steel AISI 1010 having a microstructure consisting of ferrite and pearlite. The mechanical properties, strength and ductility of DP steels were influenced by martensite volume fraction (MVF). When MVF reached value of 70%, the strength was improved by 28% and the elongation was decreased by 25%. Additionally, the DP steels obey to the two-stage strain hardening behavior. The obtained DP steels were welded by a shield metal arc weld (SMAW) process in a single pass while maintaining a constant heat input. Systematic analysis of dissimilar welded joints, microstructure and microhardness, revealed that the fusion zones remain unchanged. Tensile test of weld joints showed lower ultimate tensile strength (UTS), elongation and strain hardening exponent compared to the dual phase (DP) steel. The DP700/DP900 welded joint have the highest ultimate tensile strength compared to the other welded joints due to its higher martensite volume fraction.

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Effect of Sub-zero Treatment on the Microstructural Characteristics and Mechanical Properties of Maraging Stainless Steel

Chiu

Chen

et al. 2023

J. of Materi Eng and Perform

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Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels

Cited by 17 publications

References 45 publications

Influence of Heat Treatment on Microstructure and Mechanical Properties of Direct-Quenched Fe-0.06C-0.2Si-2.0Mn Steel

Influence of Heat Treatment on Microstructure and Mechanical Properties of Direct-Quenched Fe-0.06C-0.2Si-2.0Mn Steel

Microstructural and mechanical properties of dissimilar SMAW process joints of DP Steels obtained by intercritical heat treatment from AISI 1010 steel

Effect of Sub-zero Treatment on the Microstructural Characteristics and Mechanical Properties of Maraging Stainless Steel

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