A micromechanical modeling of the Greenwood–Johnson mechanism in transformation induced plasticity

Taleb, Lakhdar; Sidoroff, F.

doi:10.1016/s0749-6419(03)00020-2

Cited by 177 publications

(122 citation statements)

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“…It is based on previous works (see e.g. Taleb and Sidoro , [3]) on TRansformation Induced Plasticity (TRIP), which, however, are here extended for a thermo-mechanical coupling, relevant for TTS, to be taken into account. The potentialities of the model are illustrated in Section 3 on the simple 1D example of a bar submitted to a cyclic thermo-mechanical loading.…”

Section: Introductionmentioning

confidence: 99%

“…It has been widely studied and, from a purely mechanical point of view, sucessfully modelled, see e.g. Taleb and Sidoro , [3]. The phenomenological model detailed in this Section is clearly based on these previous works.…”

mentioning

confidence: 99%

“…Thus, the absolute temperature T is explicitely considered as a state variable. In the same way as in [3], the following state variables are also considered: i the in nitesimal strain tensor ; ii the transformation induced, plastic strain tensor pz ; iii the volume fraction of the "new" phase (i.e. that formed by the transformation), z ∈ [0, 1].…”

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confidence: 99%

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A thermo-mechanical modelling of the Tribological Transformations of Surface

Antoni

Désoyer

Lebon

2009

Comptes Rendus. Mécanique

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The Tribological Transformations of Surface (TTS) are observed on samples of certain steels undergoing repeated compressive loadings. They correspond to a permanent, solid-solid phase transformation localized on the surfaces of the sample on which the loading is applied. The main hypothesis of the study is that TTS are not only due to the mechanical loading but also to the thermal loading which is associated to. Thus, a thermo-mechanical model is rst proposed in the present paper, which is inspired by previous works on TRansformation Induced Plasticity (TRIP). The potentialities of the model are also brie y illustrated by a simple 1D example.Keywords: Tribological Transformations of Surface (TTS); Transformation Induced Plasticity (TRIP); Thermo-mechanical Modelling; Cyclic Compression.Résumé Les Transformations Tribologiques de Surface (TTS) sont observées sur des échantillons de certains aciers soumis à des chargements compressifs répétés. Elles correspondent à des changements de phase solide-solide irréversibles localisés sur les surfaces mécaniquement sollicitées des échantillons. L'hypothèse centrale de cette étude est que les TTS ne sont pas dus au seul chargement mécanique mais également au chargement thermique qui l'accompagne. Un modèle thermo-mécanique est ainsi proposé, qui s'inspire de travaux antérieurs sur la plasticité de transformation (TRIP). Un exemple (1D) illustratif des potentialités de ce modèle est également présenté.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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A thermo-mechanical modelling of the Tribological Transformations of Surface

Antoni

Désoyer

Lebon

2009

Comptes Rendus. Mécanique

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“…To investigate transformation plasticity, the modified Leblond equation is used in which a function decreasing the rate of transformation plasticity with the time of transformation is applied [29,30]: (26) where are volumetric structural strains when the material is transformed from the initial phase "1" into k-phase, and Y 1 represents the yield points at the output phase (soft).…”

Section: Mechanical Phenomenamentioning

confidence: 99%

“…Mathematical and numerical models of phase transformations as well as modified numerical models of the prediction of structure composition in welded joints are developed on the basis of literature data and experimental research. Elastic-plastic material is assumed in the model of mechanical phenomena, taking into account plastic, thermal and structural strain as well as transformation plasticity [29][30][31][32]. Temporary and residual stress in welded joints are obtained on the basis of the solution of equilibrium equations in a rate form, which allows to consider thermophysical properties changing with temperature and phase composition in every increase of load.…”

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confidence: 99%

Modelling and Analysis of Phase Transformations and Stresses in Laser Welding Process / Modelowanie I Analiza Przemian Fazowych I Naprężeń W Procesie Spawania Laserowego

Piekarska¹

2015

Archives of Metallurgy and Materials

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The work concerns the numerical modelling of structural composition and stress state in steel elements welded by a laser beam. The temperature field in butt welded joint is obtained from the solution of heat transfer equation with convective term. The heat source model is developed. Latent heat of solid-liquid and liquid-gas transformations as well as latent heats of phase transformations in solid state are taken into account in the algorithm of thermal phenomena. The kinetics of phase transformations in the solid state and volume fractions of formed structures are determined using classical formulas as well as Continuous-Heating-Transformation (CHT) diagram and Continuous-Cooling-Transformation (CCT) diagram during welding. Models of phase transformations take into account the influence of thermal cycle parameters on the kinetics of phase transformations during welding. Temporary and residual stress is obtained on the basis of the solution of mechanical equilibrium equations in a rate form. Plastic strain is determined using non-isothermal plastic flow with isotropic reinforcement, obeying Huber-Misses plasticity condition. In addition to thermal and plastic strains, the model takes into account structural strain and transformation plasticity. Changing with temperature and structural composition thermophysical parameters are included into constitutive relations. Results of the prediction of structural composition and stress state in laser butt weld joint are presented.

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The Role of Transformation‐Induced Plasticity in the Development of Advanced High Strength Steels

2018

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Lightweight structural components made of advanced high-strength steels (AHSSs) in the automotive industry can substantially reduce greenhouse gas emissions. The 3rd-generation AHSSs, which consist of medium Mn steel, quenching and partitioning (Q&P) steel, and carbide-free bainitic (CFB) steel, is the current research focus of the steel community. In particular, the retained austenite grains are the intrinsic components of the 3rd-generation AHSSs. These retained austenite grains can demonstrate a transformationinduced plasticity (TRIP) effect by transforming into martensite during mechanical loading, improving the strain-hardening behavior of AHSSs. Consequently, intensive research has been carried out over the past 30 years to understand the role of the TRIP effect on the development of AHSSs. Therefore, this review article is aimed to provide a state-of-the-art summary of recent progress on AHSSs with the TRIP effect. Specifically, the processing, the relationship between microstructure and mechanical properties, and the potential industrial applications of TRIP-enabled AHSSs will be addressed in this review. More importantly, the mechanical stability of the retained austenite grains, which determines the overall performance of the TRIP effect in AHSSs, will be discussed by considering several governing factors.

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A micromechanical modeling of the Greenwood–Johnson mechanism in transformation induced plasticity

Cited by 177 publications

References 16 publications

A thermo-mechanical modelling of the Tribological Transformations of Surface

A thermo-mechanical modelling of the Tribological Transformations of Surface

Modelling and Analysis of Phase Transformations and Stresses in Laser Welding Process / Modelowanie I Analiza Przemian Fazowych I Naprężeń W Procesie Spawania Laserowego

The Role of Transformation‐Induced Plasticity in the Development of Advanced High Strength Steels

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