The significant role of heating rate on reverse transformation and coordinated straining behavior in a cold-rolled austenitic stainless steel

Sun, Guangping; Hu, Jun; Zhang, Bin; Du, Linxiu

doi:10.1016/j.msea.2018.07.024

Cited by 37 publications

(22 citation statements)

References 34 publications

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“…Yielding however, appears to be the Lüders type after annealing at 650 °C for long times, although not so distinctly as obtained by Sun et al [28], who reported a long Lüders strain of 10% for a reversion-treated structure of a 17Cr-6Ni-2Cu steel, annealed at 700 °C. It is also seen that the stress-stress curves are convex in shape after annealing at temperatures of 800-900 °C, but they become concave soon after the start of yielding for samples annealed at 750-650 °C for 100 s or longer.…”

Section: Tensile Properties and Strain-induced Martensitementioning

confidence: 57%

“…The reversion mechanism in the 304 type stainless steel has been investigated in numerous studies, e.g. [18,28,[35][36][37][38][39], but somewhat different opinions exist. Some researchers have reported that the diffusional reversion can occur at low annealing temperatures of 550-650 °C [36,39] and the shear reversion occurs at higher temperatures, e.g.…”

Section: Reversion Behaviormentioning

confidence: 99%

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Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment

Somani

Jaskari

Sadeghpour

et al. 2020

Materials Science and Engineering: A

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Section: Tensile Properties and Strain-induced Martensitementioning

confidence: 57%

Section: Reversion Behaviormentioning

confidence: 99%

Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment

Somani

Jaskari

Sadeghpour

et al. 2020

Materials Science and Engineering: A

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“…A significant influence of the heating rate on reversion mechanisms was reported earlier in Refs. [24,43]. So, at a heating rate less than 10 • C/s, the diffusional mechanism of the reversion was developed.…”

Section: High-resolution Dilatometry During Continuous Heatingmentioning

confidence: 99%

Mechanisms of the Reverse Martensite-to-Austenite Transformation in a Metastable Austenitic Stainless Steel

Панов

Kudryavtsev

Chernichenko

et al. 2021

Metals

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The martensite-to-austenite reversion mechanisms under continuous heating and annealing of metastable austenitic stainless steel subjected to cold swaging were studied. The reversion-temperature-time diagram was constructed using high-resolution dilatometry. The diagram revealed a sequence of martensitic and diffusional reversion and recrystallization. Martensitic and diffusional reversion might be separated by using the heating rate of >10 °C/s. The reversion started via the martensitic mechanism, and the diffusional mechanism developed during subsequent heating. However, both mechanisms enhance simultaneously during continuous heating at slow heating rates (<10 °C/s). At higher temperatures, recrystallization occurred. Post-mortem microstructure analysis has allowed classifying the reverse annealing modes into low- (500–650 °C), medium- (~700 °C), and high-temperature (~800 °C) regimes. During low-temperature annealing, the development of the phase reversion, recovery, recrystallization, and carbide precipitation was characterized by both a high amount of new austenite grains and restriction of their growth that resulted in the formation of an ultrafine grain structure with an average grain size of 100–200 nm. Medium-temperature annealing was associated with the formation of almost a fully recrystallized austenitic structure, but the lamellar regions were still detected. Austenitic grain growth and dissolution of carbide particles were enhanced during high-temperature annealing.

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“…For the cold-rolled specimen at 66% cold rolling reduction, peak stress (%2081 MPa) at an extreme small elongation (%0.017%) is exhibited, which is mainly related to the large initial dislocations density and the limited space for dislocation accumulation during tensile deformation. [40] Figure 6. The {100}, {110}, and {111} pole figures of the martensite grains in the microstructure of the annealed sample.…”

Section: Tensile Properties Evolution During Cold Rolling and Annealingmentioning

confidence: 99%

Yielding Behavior and Strengthening Mechanisms of a High Strength Ultrafine‐Grained Cr–Mn–Ni–N Stainless Steel

Xie

Huo

et al. 2021

steel research int.

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The microstructure of Cr–Mn–Ni–N stainless steel is regulated by a combination of cold deformation and subsequent martensite reversed annealing. The yield strength and tensile strength of the tested steel are greatly improved to 1220 and 1357 MPa, respectively, by conventional heavy cold rolling (66% thickness reduction) and a subsequent annealing process (750 °C for 5 min) relative to those before cold rolling (austenized state); at the same time, the total elongation keeps an appropriate value. The results show that the grain refinement strengthening acts as the primary factor for the strengthening of the tested steels while the precipitation behavior from the M23C6‐type carbides is not quite effective. Additionally, different yield phenomena and microstructural evolution for tested steels with 66% thickness reduction annealed at 750 °C with different holding times are systematically analyzed and discussed. Lüders‐like deformation features noticeably appear but become weakening with the longer annealing time. The change in initial free mobile dislocation density is the core cause of the preyield plateau phenomenon.

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The significant role of heating rate on reverse transformation and coordinated straining behavior in a cold-rolled austenitic stainless steel

Cited by 37 publications

References 34 publications

Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment

Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment

Mechanisms of the Reverse Martensite-to-Austenite Transformation in a Metastable Austenitic Stainless Steel

Yielding Behavior and Strengthening Mechanisms of a High Strength Ultrafine‐Grained Cr–Mn–Ni–N Stainless Steel

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