Effects of the austenite grain size on transformation plasticity in a 35 NCD 16 steel

Boudiaf, Achraf; Taleb, Lakhdar; Belouchrani, Mohamed El Amine

doi:10.1504/ijmmp.2010.037611

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The two thermomechanical models presented here are able to take into account the initiation and development of these TSTs, especially in the immediate vicinity of the top of the rails on which the trains run (see [19]), based on the main assumption that the friction occurring in the wheel/rail contact area -where the thermal effects are considerable -is strongly associated with the mechanical loading mainly applied, i.e., that TSTs are due to thermomechanical coupling processes (see [17,20]). During the solid-solid phase transformations which occur under mechanical loads, an "anomalous" plastic flow, which is also known as TRIP (transformation-induced plasticity) (see [21][22][23][24][25]), generally occurs even at much lower stress levels than the initial yield stress (the softest phase) of the material in question. Indeed, this TRIP-like mechanism can be superimposed on the classical plasticity behaviour which are always present in metallic materials.…”

Section: Introductionmentioning

confidence: 99%

Return Mapping Algorithms (RMAs) for Two-Yield Surface Thermoviscoplastic Models Using the Consistent Tangent Operator

Lebon

Antoni

Désoyer

2018

International Journal of Nonlinear Sciences and Numerical Simulation

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The return mapping algorithms (RMAs) presented here are designed for use with pressure-dependent thermoviscoplastic constitutive models involving irreversible effects associated with solid–solid phase transformations. During the volume solid–solid phase transformations occurring under mechanical loads, an “anomalous” plasticity, the so-called “TRansformation Induced Plasticity” (TRIP), is generated at much lower stress levels than those related to the yield stress of the material in the context of the classical plasticity. TRIP mechanisms are superimposed on the classical plasticity which is liable to occur in the case of metallic materials. Based on a non-standard generalized material framework, two different models are presented in which an “associative” plastic flow is introduced in the context of classical plasticity and a “non-associative” flow rule in the context of TRIP-like plasticity. In this paper, a complete algorithmic treatment of these two rate-dependent constitutive models is therefore proposed with the associated consistent tangent operator for dealing the quasi-surface irreversible solid–solid transformations which can appear in metal alloys during specific thermomechanical solicitations. The predictive abilities of the presented numerical procedure for modelling this kind of the irreversible solid–solid transformations involving two plasticity processes are tested and assessed by performing a two-dimensional finite-element analysis on some numerical examples.

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Section: Introductionmentioning

confidence: 99%

Return Mapping Algorithms (RMAs) for Two-Yield Surface Thermoviscoplastic Models Using the Consistent Tangent Operator

Lebon

Antoni

Désoyer

2018

International Journal of Nonlinear Sciences and Numerical Simulation

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“…The tensile-torsional system results 14) show that under uniaxial torsional loading, transformation plasticity is independent of the prior austenite grain size (AGS), but in the uniaxial tensile loading case, it is increasing function of the AGS. Furthermore, under tensile loading tests 15) at different austenitization temperatures and holding times, martensite transformation generated different transformation plastic deformations. At higher heating rates, the materials with small AGS generated high transformation plasticity; at lower heating rates, the transformation plasticity is a slightly increasing function of AGS 15) .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, under tensile loading tests 15) at different austenitization temperatures and holding times, martensite transformation generated different transformation plastic deformations. At higher heating rates, the materials with small AGS generated high transformation plasticity; at lower heating rates, the transformation plasticity is a slightly increasing function of AGS 15) . Moreover, dilatometric tests 16) show that the dilatation of the martensite transformation decreases with increasing austenitization temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Austenitization Temperature and Holding Time on Transformation Plasticity in a Three-Point Bending System

Hamdam

Nagaki

Oshita

2015

J. Soc. Mat. Sci., Japan

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The influences of austenitization temperature and holding time on transformation plasticity behaviors were experimentally investigated in a three-point bending test, wherein the test specimen is simply supported from one end and fixed at the opposite end. The specimens were fabricated from S45C steel and heated to different austenitization temperatures (850, 900, and 950 °C). The temperatures of the specimens in the austenite phase were kept constant for 5 or 20 min, and then naturally cooled to room temperature. During the cooling process, the specimens were subjected to the maximum bending stress (less than the yield stress) before the transformation start point (around 800 °C). Under the bending stress, the transformation plasticity due to austenite to pearlite occurred. From the measured maximum transformation plasticity deflections, the transformation plasticity coefficients were determined. These coefficients were found to strongly depend on the austenitization temperature and holding time.

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Grain size dependent mechanical behavior and TRIP effect in a metastable austenitic stainless steel

Sohrabi

Mirzadeh

Sadeghpour

et al. 2023

International Journal of Plasticity

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Effects of the austenite grain size on transformation plasticity in a 35 NCD 16 steel

Cited by 3 publications

References 7 publications

Return Mapping Algorithms (RMAs) for Two-Yield Surface Thermoviscoplastic Models Using the Consistent Tangent Operator

Return Mapping Algorithms (RMAs) for Two-Yield Surface Thermoviscoplastic Models Using the Consistent Tangent Operator

Effect of Austenitization Temperature and Holding Time on Transformation Plasticity in a Three-Point Bending System

Grain size dependent mechanical behavior and TRIP effect in a metastable austenitic stainless steel

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