Design for strength-ductility synergy of 316L stainless steel with heterogeneous lamella structure through medium cold rolling and annealing

Li, Jiansheng; Gao, Bo; Huang, Zhiwei; Zhou, Hao; Mao, Qingzhong; Li, Yusheng

doi:10.1016/j.vacuum.2018.08.049

Cited by 71 publications

(22 citation statements)

References 39 publications

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“…Besides the quick reversion of the 25 vol% martensite, the annealing treatment resulted in varying fractions of nano-grains, nano-twins, lamellar coarse grains, and recrystallized grains. An excellent combination of strength and ductility was observed for this complex structure [201][202][203].…”

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confidence: 81%

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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confidence: 81%

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

181

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“…Among various methods proposed to achieve the large strains, rolling is the most efficient method for production of the sizable semi-products of austenitic stainless steels. A number of researches were devoted to the deformation microstructure and mechanical properties of austenitic stainless steels (including 304 and 316 series) after cold rolling at room temperature [9][10][11][12][13][14][15][16]. The frequent operation of twinning and martensitic transformation during cold rolling was reported to result in the rapid refinement of the microstructure.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Changes and Strengthening of Austenitic Stainless Steels during Rolling at 473 K

Odnobokova

Belyakov

Enikeev

et al. 2020

Metals

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The microstructural changes in 304L and 316L austenitic stainless steels during plate rolling with 95% rolling reduction at a temperature of 473 K and their effect on strengthening were studied. The microstructure evolution was associated with deformation twinning and microshear banding. The latter ones involved ultrafine crystallites, which rapidly evolved in strain-induced ultrafine austenite grains as a result of fast increase in misorientations between them. Besides the ultrafine austenite crystallite evolution, the microshear bands assisted local appearance of deformation martensite, which attained about 25 vol.% and 3 vol.% at total strain of 3 in 304L and 316L steels, respectively. Both the microshear banding and the martensitic transformation promoted the formation of ultrafine grains with a size of less than 1 µm. The strain dependence of the ultrafine grain fraction obeyed a modified Johnson-Mehl-Avrami-Kolmogorov function. The deformation grain size and dislocation density that develop during rolling could also be expressed by exponential functions of true strain. Incorporating the revealed relationships between the strain and the microstructural parameters into modified Hall–Petch-type equation, unique expression for the yield strength of processed steels was obtained. The dislocation strengthening was the largest contributor to the strength, especially at small to medium strains, although grain size strengthening increased during rolling approaching that from dislocations at large strains.

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“…The oxidative products can act as the relatively hard particle across the sliding interfaces, which can also play an important role in increasing material removals via forming plenty of furrows on the worn surface due to the ploughing effect of hard particles [ 33 , 34 ]. Recently, the 316L stainless steel and other alloys with heterogeneous lamella structure (HLS) containing lamellar coarse grains sandwiched between mixtures of nanotwins and nanograins, were constantly reported [ 35 , 36 , 37 , 38 ]. These HLS metallic materials possess superior strength and ductility than their coarse-grained state, which have been confirmed to have huge potential for the structural application.…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of the 316L Stainless Steel with Heterogeneous Lamella Structure

Qin

Kang

et al. 2018

Materials

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In this paper, the tribological behavior of 316L stainless steel with heterogeneous lamella structure (HLS), prepared through 85% cold rolling technology and subsequent annealing treatment (750 °C, 10 min), were conducted on a ball-on-disc tribometer under different normal loads in dry ambient air conditions. The morphologies, structures, and compositions of the raw and worn surfaces were analyzed by 3D surface profilometer, XRD, SEM, EDS and TEM. Based on this, the results showed that the HLS 316L stainless steel samples exhibited lower and more steady friction coefficients than coarse-grained samples, especially under higher loads, which can be attributed to the existence of numerous oxidative particles across sliding interfaces. However, the wear resistance of HLS 316L stainless steel sample was a little weakened compared to that of the coarse-grained sample under a normal load of 5 N. When the load increases up to 15 N, an obviously decreased wear resistance was found for the HLS of the 316L stainless steel sample, which was 50% lower than that of coarse-grained sample. This can be ascribed to the more severe oxidative and abrasive wear performance of HLS 316L stainless steel sample under dry sliding conditions.

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Design for strength-ductility synergy of 316L stainless steel with heterogeneous lamella structure through medium cold rolling and annealing

Cited by 71 publications

References 39 publications

Deformation-induced martensite in austenitic stainless steels: A review

Deformation-induced martensite in austenitic stainless steels: A review

Microstructural Changes and Strengthening of Austenitic Stainless Steels during Rolling at 473 K

Tribological Behavior of the 316L Stainless Steel with Heterogeneous Lamella Structure

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