Quenching and partitioning martensite—A novel steel heat treatment

Edmonds, David; He, Ketai; Rizzo, F.; Cooman, Bruno C. De; Matlock, David K.; Speer, John G.

doi:10.1016/j.msea.2006.02.133

Cited by 669 publications

(384 citation statements)

References 22 publications

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“…[30][31][32][33][34] This is an important contribution to in-service properties, such as a low springback and improved dent and crash resistance. [32] Extensive investigations have established the mechanisms and stages of the bake hardening behavior of low carbon steels, which are controlled by the amount of interstitial carbon atoms and the formation of Cottrell atmosphere and precipitations.…”

mentioning

confidence: 99%

“…[34,[37][38][39] It was proposed that the bake hardening behavior is associated with the changes of the dislocation substructure in the polygonal ferrite matrix. [30][31][32][33][34]37,38] However, the information on the bake hardening mechanism for the TRIP steels having a predominantly bainite matrix with a high dislocation density rather than a polygonal ferrite one is limited. [39] Therefore, in-depth studies of solute segregation resulting from the prestrain and bake hardening (PS/BH) treatment of such TRIP steels are warranted.…”

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confidence: 99%

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Understanding the Behavior of Advanced High-Strength Steels Using Atom Probe Tomography

Pereloma

Beladi

Zhang

et al. 2011

Metall Mater Trans A

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The key evidence for understanding the mechanical behavior of advanced high strength steels was provided by atom probe tomography (APT). Chemical overstabilization of retained austenite (RA) leading to the limited transformation-induced plasticity (TRIP) effect was deemed to be the main factor responsible for the low ductility of nanostructured bainitic steel. Appearance of the yield point on the stress-strain curve of prestrained and bake-hardened transformationinduced plasticity steel is due to the unlocking from weak carbon atmospheres of newly formed during prestraining dislocations.

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mentioning

confidence: 99%

mentioning

confidence: 99%

Understanding the Behavior of Advanced High-Strength Steels Using Atom Probe Tomography

Pereloma

Beladi

Zhang

et al. 2011

Metall Mater Trans A

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“…[1][2][3][4][5][6] Their mechanical properties, which are controlled by their microstructure, can be tuned relatively easily by thermomechanical processing. Ferrite is the first transformation product that forms during cooling as a result of austenite decomposition.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Grain Size Evolution for Ferrite Formation in Fe-C-Mn Steels Using a 3D Model Under a Mixed-Mode Interface Condition

Fang

Mecozzi

Brück

et al. 2017

Metall Mater Trans A

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A 3D model has been developed to predict the average ferrite grain size and grain size distribution for an austenite-to-ferrite phase transformation during continuous cooling of an Fe-C-Mn steel. Using a Voronoi construction to represent the austenite grains, the ferrite is assumed to nucleate at the grain corners and to grow as spheres. Classical nucleation theory is used to estimate the density of ferrite nuclei. By assuming a negligible partition of manganese, the moving ferrite-austenite interface is treated with a mixed-mode model in which the soft impingement of the carbon diffusion fields is considered. The ferrite volume fraction, the average ferrite grain size, and the ferrite grain size distribution are derived as a function of temperature. The results of the present model are compared with those of a published phase-field model simulating the ferritic microstructure evolution during linear cooling of an Fe-0.10C-0.49Mn (wt pct) steel. It turns out that the present model can adequately reproduce the phase-field modeling results as well as the experimental dilatometry data. The model presented here provides a versatile tool to analyze the evolution of the ferrite grain size distribution at low computational costs.

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“…Previous works on the martensitic steels showed that the carbon from the supersaturated martensite can migrate to the untransformed austenite during partitioning stage [8][9][10][11] . The carbon enrich retained austenite becomes more stable as a result of this relatively short process (usually ≤0.5 hrs) 12 .…”

Section: Introductionmentioning

confidence: 99%

Novel method for refinement of retained austenite in micro/nano-structured bainitic steels

Wan

et al. 2017

Materials Science and Technology

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A comparative study was conducted to assess the effects of two different heat treatments on the amount and morphology of the retained austenite in a micro/nano-structured bainitic steel. The heat treatments used in this work were two-stage bainitic transformation and bainitic-partitioning transformation. Both methods resulted in the generation of a multi-phase microstructure containing nanoscale bainitic ferrite, and/or fresh martensitic phases and much finer retained austenite. Both heat treatments were verified to be effective in refining the retained austenite in micro/nano-structured bainite and increasing the hardness. However, the bainitic transformation followed by partitioning cycle was proved to be a more viable approach than the two-stage bainitic transformation due to much shorter processing time, i.e. ~2 hours compared to ~4 day, respectively.

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Quenching and partitioning martensite—A novel steel heat treatment

Cited by 669 publications

References 22 publications

Understanding the Behavior of Advanced High-Strength Steels Using Atom Probe Tomography

Understanding the Behavior of Advanced High-Strength Steels Using Atom Probe Tomography

Analysis of the Grain Size Evolution for Ferrite Formation in Fe-C-Mn Steels Using a 3D Model Under a Mixed-Mode Interface Condition

Novel method for refinement of retained austenite in micro/nano-structured bainitic steels

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