Stress-Induced Martensitic Transformation Behaviors at Various Temperatures and Their TRIP Effects in SUS304 Metastable Austenitic Stainless Steel

Tsuchida, Noriyuki; Morimoto, Yoshiki; Tonan, Tomoyuki; Shibata, Yosuke; Fukaura, Kenzo; Ueji, Rintaro

doi:10.2355/isijinternational.51.124

Cited by 111 publications

(122 citation statements)

References 21 publications

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“…The XRD experiment procedures are the same as those in previous reports. 11,12) The volume fractions were deduced from the assumption that the sum of the integrated intensities of the diffraction peaks from each phase is proportional to the volume fraction. The volume fraction of stress-induced martensite for the fractured specimens was also calculated in a similar manner.…”

Section: Methodsmentioning

confidence: 99%

“…Chemical compositions and those for the austenite (γ ) and ferrite (α) phases (mass%), Ni equivalent (Nieq.) 8) and Md30 9) in the γ phase of the S32101, SUS329J4L, SUS304 11) and SUS301L 12) steels. larger than that of SUS329J4L.…”

Section: Microstructurementioning

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%

“…In contrast, the work-hardening rate for S32101 steel stopped decreasing and began to increase again below 273 K. This behavior is frequently observed in metastable austenitic stainless steels. 11,14) Stress-induced martensitic transformation behavior during tensile deformation was expected to play a significant role in the work-hardening rate. Figure 3 indicates that stress-induced martensitic transformation occurs below 273 K in S32101 steel.…”

Section: Microstructurementioning

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: Methodsmentioning

confidence: 99%

Section: Microstructurementioning

confidence: 99%

Section: 1215)mentioning

confidence: 99%

Section: Microstructurementioning

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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“…3) One uses dislocation forest hardening, e.g., [4][5][6] while the other employs the idea that martensite colonies act as plastically strong inclusions like reinforcing components in a composite and induce large work hardening, as argued by Bhadeshia. 2) Our previous paper 3) supported this idea on the basis of experimental observations. It showed that the stress induced martensitic transformation that has occurred previously at a lower temperature induced larger work hardening in subsequent higher temperature deformation where the transformation proceeds slowly.…”

Section: Introductionmentioning

confidence: 99%

Back Stress Work Hardening Confirmed by Bauschinger Effect in a TRIP Steel Using Bending Tests

et al. 2014

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Martensite formed in TRIP steels causes large work hardening. The expectation that this is due to the back stresses induced into the ferrite by the hard martensite was examined by the Bauschinger effect after room temperature tensile straining of a TRIP steel into which the martensite had been introduced by prior straining at -50°C. Bending tests were employed to detect the Bauschinger effect. The tests showed that the compressive flow stress became much smaller than the tensile flow stress and confirmed the expectation.

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Characteristics of Deformation Induced Martensite in SUS304 Austenitic Stainless Steel Deformed at RT and −60°C

Chen¹,

Gao²,

Terada³

et al. 2013

Pricm

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Stress-Induced Martensitic Transformation Behaviors at Various Temperatures and Their TRIP Effects in SUS304 Metastable Austenitic Stainless Steel

Cited by 111 publications

References 21 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

Back Stress Work Hardening Confirmed by Bauschinger Effect in a TRIP Steel Using Bending Tests

Characteristics of Deformation Induced Martensite in SUS304 Austenitic Stainless Steel Deformed at RT and −60°C

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