Reverse Transformation Mechanism of Martensite to Austenite in 00Cr15Ni7Mo2WCu2 Super Martensitic Stainless Steel

Jiang, Wen; Ye, Dong; Li, Jun; Su, Jie; Zhao, Kun

doi:10.1002/srin.201300264

Cited by 26 publications

(15 citation statements)

References 11 publications

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“…The model successfully predicted the austenite phase fraction during isothermal annealing in a range of alloys, but does not take multicomponent diffusion into account. Thus the well-documented solute partitioning during austenite reversion [8,[17][18][19][20], which according to Bojack et al is responsible for the two-step kinetics [22], is not reflected in such a model. Esin et al modelled two stage austenitization from cementite and ferrite in a lowalloy steel using the kinetics model for diffusion controlled transformations DICTRA [21].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The formation of lamellar austenite was reported to be promoted by the establishment of an energetically favorable phase-interface (Kurdjumov-Sachs [12][13][14][15]), and might be affected by residual stress of the martensite transformation and grain-boundary segregation [16]. Partitioning of Ni is a well-documented mechanism of stabilizing reversed austenite to room temperature [8,[17][18][19][20]. Furthermore, the internal substructure of austenite [8] and the size and shape distributions of the austenite regions [10], were suggested to affect thermal stability.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics analysis of two-stage austenitization in supermartensitic stainless steel

et al. 2017

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetics analysis of two-stage austenitization in supermartensitic stainless steel

et al. 2017

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“…The concept of incorporating the Cr eq and Ni eq values into the ΔG → has been successfully used for studying the reversion mechanism in different ASSs [5,75,195,197,218,[222][223][224]. (17) Cr eq = Cr + 4.5Mo…”

Section: Reversion Mechanismsmentioning

confidence: 99%

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

181

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Recent progress in the understanding of the deformation-induced martensitic transformation, the transformation-induced plasticity (TRIP) effect, and the reversion annealing in the metastable austenitic stainless steels are reviewed in the present work. For this purpose, the introduced methods for the measurement of martensite content are summarized. Moreover, the austenite stability as the key factor for controlling the austenite to martensite transformation is critically discussed. This is realized by analyzing the effects of chemical composition, initial grain size, applied strain, deformation temperature, strain rate, and deformation mode (stress state). For instance, the effect of initial grain size is found to be complicated, especially in the ultrafine grained (UFG) regime. Furthermore, it seems that there is a critical grain size for changing the trend of α′-martensite formation. Decreasing the deformation temperature motivates the formation of α′-martensite, but there is a critical temperature for achieving the maximum tensile ductility. Afterwards, the modeling techniques for the transformation kinetics and the contribution of deformation-induced martensitic transformation to the strengthening of material and also strength-ductility trade-off are critically surveyed. The processing of UFG microstructure during reversion annealing, the effects of the recrystallization of the retained austenite, the martensitic shear and diffusional reversion mechanisms, and the annealing-induced martensitic transformation are also summarized. Accordingly, this overview presents the opportunities that the strain-induced martensitic transformation can offer for controlling the microstructure and mechanical properties of metastable austenitic stainless steels.

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“…The microstructures were determined by the reverse-transformation kinetics, which, in turn, was related to the cold deformation [17][18]. The metastable austenitic phase was transformed to the martensite after cold deformation, and the strain-induced martensite lath structure was destroyed preferentially via the large deformation to the refined structure during the cold rolling [16].…”

Section: Reverse Transformation Of Austenite After Annealingmentioning

confidence: 99%

Reverse-transformation austenite structure control with micro/nanometer size

Niu

Fengjuan³

et al. 2017

Int J Miner Metall Mater

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Abstract:To control the reverse-transformation austenite structure through manipulation of the micro/nanometer grain structure, the influences of cold deformation and annealing parameters on the microstructure evolution and mechanical properties of 316L austenitic stainless steel were investigated. The samples were first cold-rolled, and then samples deformed to different extents were annealed at different temperatures. The microstructure evolutions were analyzed by optical microscopy, scanning electron microscopy (SEM), magnetic measurements, and X-ray diffraction (XRD); the mechanical properties are also determined by tensile tests. The results showed that the fraction of stain-induced martensite was approximately 72% in the 90% cold-rolled steel. The micro/nanometric microstructure was obtained after reversion annealing at 820-870°C for 60 s. Nearly 100% reversed austenite was obtained in samples annealed at 850°C, where grains with a diameter ≤ 500 nm accounted for 30% and those with a diameter > 0.5 μm accounted for 70%. The micro/nanometer-grain steel exhibited not only a high strength level (approximately 959 MPa) but also a desirable elongation of approximately 45%.

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Reverse Transformation Mechanism of Martensite to Austenite in 00Cr15Ni7Mo2WCu2 Super Martensitic Stainless Steel

Cited by 26 publications

References 11 publications

Kinetics analysis of two-stage austenitization in supermartensitic stainless steel

Kinetics analysis of two-stage austenitization in supermartensitic stainless steel

Deformation-induced martensite in austenitic stainless steels: A review

Reverse-transformation austenite structure control with micro/nanometer size

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