Deformation-induced martensitic transformation and transformation-induced plasticity in steels

Tamura, Imao

doi:10.1179/030634582790427316

Cited by 386 publications

(201 citation statements)

References 30 publications

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“…Work hardening in austenitic steels is enhanced by martensitic transformation [1][2][3] and deformation twinning. [2][3][4] Assuming that a material is ductile, a fracture occurs when the stress-strain response satisfies the plastic instability condition described as where σ is the true stress, and ε is the true strain.…”

Section: Introductionmentioning

confidence: 99%

TWIP Effect and Plastic Instability Condition in an Fe^|^ndash;Mn^|^ndash;C Austenitic Steel

2013

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We investigated the correlation among deformation twin density, work hardening, and tensile ductility in an Fe-18Mn-1.2C twinning-induced-plasticity (TWIP) steel, and discussed the correlation with the plastic instability condition. The deformation twin density was varied by changing the deformation temperature from 123 to 523 K. An important factor for the uniform elongation is the work hardening rate in a later deformation stage. The increase in the deformation twin density enhanced the work hardening rate significantly but not monotonically just before the fracture, since the deformation twin density is saturated against plastic strain. In addition, dynamic strain aging in a later deformation stage and ε-martensitic transformation were found to accelerate the fracture due to the localized deformation and the premature fracture, respectively. Accordingly, the relationship between uniform elongation and deformation twin density was not simple. The optimum conditions for the TWIP effect were concluded to be (1) considerable amount of deformation twinning in a later deformation stage, (2) suppression of dynamic strain aging in a later deformation stage, and (3) inhibition of ε-martensitic transformation.KEY WORDS: high carbon; high Mn steel; austenitic steel; twinning-induced plasticity; work hardening; dynamic strain aging.

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Section: Introductionmentioning

confidence: 99%

TWIP Effect and Plastic Instability Condition in an Fe^|^ndash;Mn^|^ndash;C Austenitic Steel

2013

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“…The transformation induced plasticity (TRIP) effect occurs in metastable austenitic or austenitic-martensitic steels for wrought and also cast alloys [1]. The strain induced formation of martensite is controlled as well by its chemical composition as by stresses [2]. These stresses are higher than the yield stress of the initial microstructure and they activate shear processes which are accompanied by deformations.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of high alloyed cast and rolled CrMnNi TRIP steels with varying Ni contents

Jahn

Kovalev

Weiβ

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. High alloyed metastable austenitic or austenitic-martensitic steels show a strain induced formation of martensite during mechanical loading. These kinds of steels are well known as material for rolled products. Based on the System Fe-Cr-Mn-Ni a new generation of cast steels with TRIP effect will be discussed. The investigations show how the mechanical properties and the fraction of the formed martensite are influenced by varying Ni contents. The mechanical properties in the cast state of the material are quite similar to those in the rolled state. This is valid for tensile as well as compression loading. Under certain conditions, an isothermal formation of martensite was observed in some of the steels. The experimental results are based on tensile and compression tests. The specimens were analysed by optical microscopy, electron backscatter diffraction (EBSD), dilatometer tests and a special method for the detection of the ferromagnetic phase contents, the magnetic balance.

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“…292 Significant discrepancy still exists in explaining the 293 strengthening mechanisms of metastable austenitic stain-294 less steels and, in concrete, the effect of the strain-in-295 duced a¢-martensite phase. Since the highly dislocated 296 a¢-phase is much harder than the austenite, some 297 authors [40,41] consider austenite-martensite mixtures as 298 composites of soft austenitic matrix with hard martensite 299 dispersion. Spencer et al [42] demonstrated that marten-300 site sustains a clearly higher stress than austenite, 301 concluding that a¢-martensite acts as the reinforcing 302 phase.…”

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confidence: 99%

Correlation Between Microstructure and Mechanical Properties Before and After Reversion of Metastable Austenitic Stainless Steels

Fargas

Zapata

Roa

et al. 2015

Metall Mater Trans A

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Deformation-induced martensitic transformation and transformation-induced plasticity in steels

Cited by 386 publications

References 30 publications

TWIP Effect and Plastic Instability Condition in an Fe^|^ndash;Mn^|^ndash;C Austenitic Steel

TWIP Effect and Plastic Instability Condition in an Fe^|^ndash;Mn^|^ndash;C Austenitic Steel

Mechanical properties of high alloyed cast and rolled CrMnNi TRIP steels with varying Ni contents

Correlation Between Microstructure and Mechanical Properties Before and After Reversion of Metastable Austenitic Stainless Steels

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