Effect of short duration tempering on the microstructure and mechanical properties of a continuously annealed dual phase steel

Mukherjee, Madhumita; Chintha, Appa Rao; Raj, Abhishek; Pathak, Prashant; Haldar, Arunansu

doi:10.1179/1743284712y.0000000044

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…[36] It can be seen that the obtained Q value of 108.8 kJ/mol is close to 103 kJ/mol, which implies that the tempering kinetics in this steel is controlled by carbon diffusion. This is consistent with the previous reports [37] and shows this effect quantitatively.…”

Section: Methodssupporting

confidence: 94%

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

Mosayebi

Soleimani

Mirzadeh

et al. 2021

Materials & Corrosion

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The kinetics and the effects of tempering on the corrosion resistance of AISI 4130 steel were studied. The tempering activation energy was close to that for the diffusion of C in α-iron. This implies that the tempering kinetics in this steel is controlled by carbon diffusion. By increasing the time and temperature of tempering, the corrosion current density (i corr ) in the polarization curves decreased whereas the diameter of the semicircular arc in the Nyquist plots increased, which implies higher corrosion resistance. The i corr was successfully related to hardness, which actually indicates the effect of microstructure.Based on these findings, the quench and tempering treatment was used to adjust both the hardness and corrosion resistance of the AISI 4130 steel.

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Section: Methodssupporting

confidence: 94%

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

Mosayebi

Soleimani

Mirzadeh

et al. 2021

Materials & Corrosion

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“…When the peak temperature and holding time of higher temperature decrease, the martensite tempering of dual phase steels becomes less severe and thus the extent of softening decreases. 17, 34 Therefore, the local cooling could contribute to the reduction in the HAZ softening for both DP980 and DP780 joints.…”

Section: Resultsmentioning

confidence: 99%

Improving formability of laser welded automotive dual phase steels with local cooling

Wei

Zhang

Yang

et al. 2015

Science and Technology of Welding and Joining

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A new laser welding process with the local cooling was presented and applied to two automotive dual phase steels, DP780 and DP980. The microstructure, microhardness, tensile properties of welded joints and limiting dome height (LDH) of welded blanks were investigated. It is observed that the local cooling during laser welding process can greatly reduce the martensite tempering and thus reduce the heat affected zone softening. The laser welded joints with the local cooling all failed at the base metal, and exhibit the comparable strength and ductility with the base metal. For the welded blanks with the local cooling, LDH is increased significantly, and failure initiates from the weld and propagates perpendicular to the weld.

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“…Mukherjee et al [211] found that the tempering with a short duration noticeably affected the mechanical properties of DP steels. They reported that the yield strength of tempered DP steel increased primarily because of the quench aging of ferrite, while the decrease in tensile strength of steel was attributed to the tempered martensite.…”

Section: Temperingmentioning

confidence: 99%

Processing, microstructure adjustments, and mechanical properties of dual phase steels: A review

Kalhor

Taheri

Mirzadeh

et al. 2021

Materials Science and Technology

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In this review, effects of initial microstructure before intercritical annealing and processing routes of dual phase (DP) high strength steels are discussed. Prior-applied deformation processes as cold rolling and severe plastic deformation (SPD) including their impacts on mechanical properties of DP steels are described. Influences of heating rate, recrystallization of ferrite, nucleation and grain growth of austenite on the microstructure evolution are also presented. The intercritical annealing and thermomechanical processes of DP steels are comparatively outlined. Furthermore, post-intercritical annealing treatments, i.e., tempering, bake hardening, strain and quench aging are argued. Effects of key alloying elements on the microstructure and mechanical properties of DP steels are briefly summarized. A further development of DP steels can properly benefit from this extensive review.

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Effect of short duration tempering on the microstructure and mechanical properties of a continuously annealed dual phase steel

Cited by 10 publications

References 19 publications

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

Tempering kinetics and corrosion resistance of quenched and tempered AISI 4130 medium carbon steel

Improving formability of laser welded automotive dual phase steels with local cooling

Processing, microstructure adjustments, and mechanical properties of dual phase steels: A review

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