Role of stress-induced martensitic transformation in TRIP effect of metastable austenitic steels

Tsuchida, Noriyuki; Kawabata, Saya; Fukaura, Kenzo; Ueji, Rintaro

doi:10.1016/j.jallcom.2011.11.071

Cited by 12 publications

(12 citation statements)

References 5 publications

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“…19,20,27) at 296 K. Details of the experimental procedures for tensile tests are described in the references. [18][19][20][21][22]27) In order to investigate the effects of temperature and strain rate on the stressinduced martensitic transformation kinetics, test samples deformed by various amounts of ε were also prepared for xray diffraction analysis. Details of the quantitative estimation of the austenite and martensite phases by x-ray diffraction are also summarized in our previous papers.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the conditions of stress-induced martensitic transformation for the maximum uniform elongation through the TRIP effect are almost the same in the metastable austenitic stainless steels with different Nieq.. Because the transformation kinetic was almost the same between the SUS301L and the SUS304 at the maximum uniform elongation, the temperature at the maximum uniform elongation was dependent on the Nieq., i.e., the chemical composition. 5,21) The higher the Nieq. was, the lower the temperature became at the maximum uniform elongation.…”

Section: Conditions Of Stress-induced Transformation Formentioning

confidence: 99%

“…Thus far, metastable austenitic stainless steels, 1−14) 9% Ni steels, 15) and TRIP-aided multi-microstructure steels 16−18) have been investigated for TRIP steels. In our previous studies, we investigated the effects of temperature, 19) strain rate 20) and Ni equivalent 21,22) on the TRIP effect and stress-strain curve 22,23) in metastable austenitic stainless steels. In terms of the temperature dependence on the TRIP effect in the SUS304 (Ni equivalent (Nieq.)…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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Effects of temperature and strain rate on tensile properties in metastable austenitic stainless steel SUS301L were studied in order to clarify the conditions of stress-induced martensitic transformation behavior for the maximum uniform elongation through the TRIP effect. The experimental results of the previously studied SUS304 steel were used to compare the conditions of metastable austenitic steels with different austenite stability. In the static tensile tests for the SUS301L steel at temperatures between 123 K and 373 K, the tensile strength increased with decreasing temperature, and uniform elongation reached a maximum at 323 K. The volume fraction of stress-induced martensite (Vα ) at the same true strain increased with a decrease in temperature. For the strain-rate dependence on transformation kinetics, Vα decreased at strain rates higher than about 10 -2 s -1 due to the temperature rise caused by adiabatic deformation. The equation for stress-induced transformation behavior proposed by Matsumura et al. was modified to consider the saturation value of stress-induced martensite, and the modified equation could describe the transformation kinetics precisely. The conditions of stress-induced transformation for the maximum uniform elongation through the TRIP effect were coincident between the SUS301L and the SUS304 with different austenite stability: the volume fraction of martensite at a true strain of 0.3 is approximately 5% and the maximum transformation rate is almost 2 at a higher true strain near uniform elongation.

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Section: Methodsmentioning

confidence: 99%

Section: Conditions Of Stress-induced Transformation Formentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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“…By contrast, when the SFE is higher than the 2σ(n) term, the overlapping on successive {111} planes should be more favorable, forming a deformation twin embryo. It is well established that deformation temperature [10][11][12] and chemical composition [13,14] are the most effective factors in controlling the austenite stability which is mainly attributed to their influence on SFE of the alloy [15][16][17]. Regarding the boundary values of SFE for the occurrence of deformation induced martensitic transformation or deformation twinning, different values have been reported which is related to the difference in chemical composition of the studied alloy, density of dislocations, dislocation configurations, grain size and method of SFE measurement.…”

Section: Introductionmentioning

confidence: 99%

Microstructural investigation on deformation behavior of high purity Fe–Cr–Ni austenitic alloys during tensile testing at different temperatures

Behjati

Kermanpur

Najafizadeh

et al. 2014

Materials Science and Engineering: A

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“…[1][2][3] Various studies on the TRIP effect in metastable austenitic stainless steels, 1,[3][4][5][6] TRIP-aided multi-microstructure steels, 2,[7][8][9][10] and other steels have been reported. We have also paid attention to the role of the DIMT in the TRIP effect, and have investigated the effects of temperature, 11,12) strain rate, 12,13) and Ni equivalent (chemical composition) 14) on the TRIP effect in metastable austenitic stainless steels. It is well known that the DIMT behavior usually plays an important role in the TRIP effect.…”

Section: Introductionmentioning

confidence: 99%

Role of Deformation-Induced Martensite in TRIP Effect of Metastable Austenitic Steels

2021

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Role of deformation-induced martensite in the transformation-induced plasticity (TRIP) of metastable austenitic steels was studied by examining effects of temperature on the tensile properties of Fe-18%Cr-6%Ni-0.2%N-0.1%C (6Ni-0.2N-0.1C) steel. The tensile properties obtained by tensile tests at various temperatures between 123 and 373 K were compared with those of SUS304 steel. The 0.2% proof stress, tensile strength, and uniform elongation of the 6Ni-0.2N-0.1C steel were larger than those of SUS304 at all temperature studied, and the mechanical stability of the austenite for the 6Ni-0.2N-0.1C steel was higher than that for the SUS304 steel. Neutron diffraction experiments at room temperature showed that the improvements in the mechanical properties in the 6Ni-0.2N-0.1C steel were associated with larger work hardening of the austenite and larger strength of the deformation-induced martensite. The increase in strength of deformation-induced martensite with N and C additions leads to better mechanical properties due to the TRIP effect, despite of smaller amounts of deformation-induced martensitic transformation.

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Role of stress-induced martensitic transformation in TRIP effect of metastable austenitic steels

Cited by 12 publications

References 5 publications

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

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

Microstructural investigation on deformation behavior of high purity Fe–Cr–Ni austenitic alloys during tensile testing at different temperatures

Role of Deformation-Induced Martensite in TRIP Effect of Metastable Austenitic Steels

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