Microstructural evolution and recrystallization behavior of cold rolled austenitic stainless steel with dual phase microstructure during isothermal annealing

Sun, Guangping; Du, Linxiu; Hu, Jun; Misra, R.D.K.

doi:10.1016/j.msea.2017.10.054

Cited by 67 publications

(22 citation statements)

References 46 publications

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“…It is possible that some deformed retained austenite (RA) remain in the microstructure as shown in Fig. 12, which affects the microstructural evolution during annealing stage [3,45,47,104,106,111,161,[193][194][195][196][197][198][199]. Moreover, the deformationinduced martensite forms gradually and will be inevitably deformed to different degrees, which also has an influence on microstructure heterogeneity and thereby on the mechanical properties [2,53].…”

Section: Martensite Process and Reversion Annealingmentioning

confidence: 99%

See 1 more Smart Citation

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

171

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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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Section: Martensite Process and Reversion Annealingmentioning

confidence: 99%

“…The repetition of the martensite process (cold rolling and reversion annealing) has been successfully used for further grain refinement of ASSs [86,122,170,194,[212][213][214][215] as shown in Fig. 15a and an example of the resultant grain refinement is shown in Fig.…”

Section: Repetitive Processesmentioning

confidence: 99%

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

171

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“…Regarding ASSs, due to the absence of a notable phase transformation during the thermal treatment, grain refinement has been achieved by static recrystallization (SRX), dynamic recrystallization (DRX), formation and reversion of strain‐induced martensite, and various severe plastic deformation techniques . In fact, many commercial ASSs are metastable against the martensitic transformation during deformation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Grain Size on Mechanical Properties and Work‐Hardening Behavior of AISI 304 Austenitic Stainless Steel

Naghizadeh

Mirzadeh

2019

steel research int.

120

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Grain size effects on the properties of AISI 304 austenitic stainless steel are studied. Yield stress (YS) and ultimate tensile strength (UTS) increased with decreasing grain size (Hall–Petch law) while the difference between YS and UTS decreased. Three distinct stages for work‐hardening rate are identified: I) initial rapid fall until reaching a minimum value, II) subsequent rise to a maximum due to the transformation‐induced plasticity (TRIP) effect, which is found to enhance by increasing grain size, and III) final fall until the onset of necking. More in‐depth analysis on the mechanical stability of austenite reveals that for below‐average grain size of ≈50 μm, by decreasing grain size, the TRIP effect diminishes; whereas for grain size larger than ≈50 μm, by increasing grain size, the TRIP effect becomes less pronounced. Due to the strong TRIP effect, high incremental work‐hardening exponents (n‐values of higher than 0.8) and low‐yield ratios (smaller than 0.5) are observed. It is also found that when the average grain size increases, the tensile toughness and the size and depth of dimples increase. The latter is responsible for the tardiness of the microcavity coalescence, which is indicative of high ductility of this austenitic alloy.

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“…This effect is based on the phenomenon of strain-induced martensitic transformation during cold working and subsequent martensite-to-austenite reversion during annealing [1,2]. In view of the potential advantages of this approach, it has attracted considerable interest, and a large volume of literature on the subject has been published recently [3][4][5][6][7][8][9][10][11][12][13][14][15]. An examination of these publications suggests however that the main emphasis in prior work has been the martensite-to-austenite reversion step.…”

Section: Introductionmentioning

confidence: 99%

EBSD investigation of microstructure evolution during cryogenic rolling of type 321 metastable austenitic steel

Aletdinov

Mironov

Korznikova

et al. 2019

Materials Science and Engineering: A

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Electron backscatter diffraction (EBSD) was employed to establish microstructure evolution in type 321 metastable austenitic stainless steel during rolling at a near-liquid-nitrogen temperature. A particular emphasis was given to evaluation of microstructure-strength relationship. As expected, cryogenic rolling promoted strain-induced martensite transformation. The transformation was dominated by the →sequence but clear evidence of the →→ transformation path was also found. The martensitic reactions were found to occur almost exclusively within deformation bands, i.e., the most-highly strained areas in the austenite. This prevented a progressive development of deformation-induced boundaries and thus suppressed the normal grain-subdivision process in this phase. On the other hand, the preferential nucleation of martensite within the deformation bands implied a close relationship between the transformation process and slip activity in parent austenite grains. Indeed, the martensite reactions were found to occur preferentially in austenite grains with crystallographic orientations close to Goss {110}<100> and Brass {110}<112>. Moreover, the martensitic transformations were governed by preferential variant selection which was most noticeable in -martensite. The sensitivity of the martensitic reactions to the crystallographic orientation of the austenite grains resulted in re-activation of the transformation process after development of a deformation-induced texture in the austenitic phase at high strains. Both martensitic phases were concluded to experience plastic strain which resulted in measurable changes in misorientation distributions. Cryogenic rolling imparted dramatic strengthening resulting in a more-than-sixfold increase in yield strength. The main source of hardening was the martensitic transformation with lesser contributions from dislocations and subboundary strengthening of the austenite.

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Microstructural evolution and recrystallization behavior of cold rolled austenitic stainless steel with dual phase microstructure during isothermal annealing

Cited by 67 publications

References 46 publications

Deformation-induced martensite in austenitic stainless steels: A review

Deformation-induced martensite in austenitic stainless steels: A review

Effects of Grain Size on Mechanical Properties and Work‐Hardening Behavior of AISI 304 Austenitic Stainless Steel

EBSD investigation of microstructure evolution during cryogenic rolling of type 321 metastable austenitic steel

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