Effects of Temperature and Strain Rate on TRIP Effect in SUS301L Metastable Austenitic Stainless Steel

Tsuchida, Noriyuki; Yamaguchi, Yuko; Morimoto, Yoshiki; Tonan, Tomoyuki; Takagi, Yoshinori; Ueji, Rintaro

doi:10.2355/isijinternational.53.1881

Cited by 55 publications

(85 citation statements)

References 29 publications

(68 reference statements)

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“…The solid and dotted lines in Fig. 7(a) were calculated using 15,16) ................. (1) where Vα is the volume fraction of stress-induced martensite, Vα s is the saturation value of Vα, i.e., the volume fraction at fracture, Vγ 0 is the volume fraction of austenite before Equation (1) is the corrected form of the equation proposed by Matsumura et al 17,18) The correction arises from the assumption that all of the austenite does not necessarily transform into the stress-induced martensite under some deformation conditions. 16) Table 3 summarizes the constants in Eq.…”

Section: Effects Of Temperature and Strain Rate On Tensile Propertiesmentioning

confidence: 99%

“…Next, the relationship between the temperature dependence of the uniform elongation and the stress-induced transformation behavior of S32101 is discussed. In the previous study, 11,15) the following two conditions for the stress-induced transformation that allows for a good uniform elongation from the TRIP effect were summarized for metastable austenite steels.…”

Section: 1215)mentioning

confidence: 99%

“…It is necessary for the TRIP effect in duplex stainless steels to consider various factors such as the stress-induced martensitic transformations, deformation behavior in the γ and α phases, and stress partitioning between phases. 15,19,20) A quantitative discussion is a task for future works.…”

Section: 1215)mentioning

confidence: 99%

“…Figure 9 shows a comparison of the temperature dependence of the mechanical properties of S32101, SUS304, 11) and SUS301L 15) steels. The 0.2% proof stress and tensile strength increased with decreasing temperature, while the 0.2% proof stress of SUS304 decreased below 243 K because of the stressinduced transformation of the γ phase before yielding.…”

Section: Comparison Of Trip Effects In Lean Duplex Stain-mentioning

confidence: 99%

“…We have also reported the detailed conditions that summarize the previous findings. 11,15) Some of these conditions apply to the S32101, as shown in Fig. 7.…”

Section: Comparison Of Trip Effects In Lean Duplex Stain-mentioning

confidence: 99%

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Effects of Temperature and Strain Rate on Tensile Properties of a Lean Duplex Stainless Steel

et al. 2014

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Effects of temperature and strain rate on tensile properties in a lean duplex stainless steel S32101 were investigated. The 0.2% proof stress and tensile strength increase with a decrease in the temperature and an increase in the strain rate. The uniform elongation decreased with an increase in the strain rate. In the temperature dependence on uniform elongation, it increased from 273 K to 283 K and indicated the maximum uniform elongation at 258 K. This is closely associated with TRIP effect because austenite is transformed to stress-induced martensite at temperatures below 283 K from the x-ray diffraction experiments. The stress-induced transformation behavior at 258 K, at which the maximum uniform elongation was obtained, had things in common with the case of metastable austenitic stainless steels. When the tensile properties were compared between the S32101 and the metastable austenitic stainless steels, the increase in the uniform elongation due to TRIP effect was almost the same. At low temperatures below about 250 K, the uniform elongations of the metastable austenitic steels were smaller than that of the S32101 because of the large amount of stress-induced martensite at small strains.KEY WORDS: lean duplex stainless steels; temperature; strain rate; TRIP; metastable austenitic stainless steels.

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Section: Effects Of Temperature and Strain Rate On Tensile Propertiesmentioning

confidence: 99%

Section: 1215)mentioning

confidence: 99%

Section: 1215)mentioning

confidence: 99%

Section: Comparison Of Trip Effects In Lean Duplex Stain-mentioning

confidence: 99%

“…We have also reported the detailed conditions that summarize the previous findings. 11,15) Some of these conditions apply to the S32101, as shown in Fig. 7.…”

Section: Comparison Of Trip Effects In Lean Duplex Stain-mentioning

confidence: 99%

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Effects of Temperature and Strain Rate on Tensile Properties of a Lean Duplex Stainless Steel

et al. 2014

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Ultra High Strength Stainless Steels Obtained by Quenching‐Deformation‐Partitioning (QDP) Processing

et al. 2018

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A novel Quenching‐Deformation‐Partitioning (QDP) processing is applied to the Fe–19Cr–4Ni–3Mn–0.5Si–0.14N–0.16C (wt%) TRIP/TWIP steel with a microstructure consisting of austenite and 4 vol% δ‐ferrite in the solution annealed (SA) condition. The QDP processing involves pre‐straining at −40 °C followed by partitioning at 450 °C for 3 min. The volume fraction of strain‐induced α′‐martensite after an engineering pre‐strain of 25% at −40 °C is about 56 vol%. In spite of the formation of precipitates inside the α′‐martensite during partitioning, the austenite is enriched with the interstitial elements C and N. After QDP processing, the steel exhibits outstanding mechanical properties, for example, a yield strength of 1330 MPa, an ultimate tensile strength of 1490 MPa, and a total elongation of 16% at room temperature (RT). The yield strength and the ultimate tensile strength increase by 290% and 70%, respectively, with respect to the SA condition. The reduction of the tensile test temperature from 100 °C to −40 °C results in a concurrent enhancement of strength and ductility. The enhancement of tensile ductility at lower temperatures is explained by the enhanced glide planarity originating from the facilitated dissociation of perfect dislocations into Shockley partials.

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A Composite Modeling Analysis of the Deformation Behavior of Medium Manganese Steels

Rana

Gibbs

Moor

et al. 2015

steel research int.

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A composite model with different assumed flow behaviors for the individual microstructural constituents and stability parameters for the metastable austenite transformation is presented and shown to provide design insight into the development of third-generation advanced high strength steels with a wide spectrum of tensile properties. The deformation behavior of a Fe-7.09 Mn-0.099 C-0.13 Si (wt%) steel is evaluated with uniaxial tensile testing and the results are correlated with predictions of the composite model. It is shown that the present simple composite model can predict tensile strength and uniform elongation with good accuracy over a range of austenite volume fractions in the steel. The analysis is based on Mn enrichment into austenite during intercritical annealing of the steel resulting in microstructures with significant variations in the amount and stability of austenite. Strategies for controlling the stability and amount of austenite in medium Mn steels are also presented in low carbon, nominally 5-10 wt% Mn-containing steels with/without Al as an alloying addition.

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Effects of Temperature and Strain Rate on TRIP Effect in SUS301L Metastable Austenitic Stainless Steel

Cited by 55 publications

References 29 publications

Effects of Temperature and Strain Rate on Tensile Properties of a Lean Duplex Stainless Steel

Effects of Temperature and Strain Rate on Tensile Properties of a Lean Duplex Stainless Steel

Ultra High Strength Stainless Steels Obtained by Quenching‐Deformation‐Partitioning (QDP) Processing

A Composite Modeling Analysis of the Deformation Behavior of Medium Manganese Steels

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