A model for transformation plasticity during bainite transformation of steel under external stress

Han, Heung Nam; Suh, Dong‐Woo

doi:10.1016/s1359-6454(03)00333-1

Cited by 65 publications

(58 citation statements)

References 20 publications

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“…• The deformation due to martensitic transformation is an invariant--plane strain P. It is this which should be used to calculate the interaction energy (variant selection) rather than, for example, the Bain strain [26].…”

Section: Variant Selectionmentioning

confidence: 99%

“…We begin therefore with an introduction to this theory. [19][20][21][22][23][24][25][26][27][28][29][30][31] Crystallographic Theory of Martensite Structure of the Interface Any process which contributes to the formation of martensite cannot rely on assistance from thermal activation. There must therefore exist a high level of continuity across the interface, which must either be coherent or semi-coherent.…”

Section: Introductionmentioning

confidence: 99%

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Mathematics of Crystallographic Texture in Martensitic and Related Transformations

Bhadeshia

Kundu

Abreu

2009

Microstructure and Texture in Steels

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This paper is an introduction to the mathematical estimation of the crystallographic texture and microstructure resulting from the displacive transformation of austenite in steels, under the influence of an externally applied system of stresses. It begins with an introduction to the problem, a description of the phenomenological theory of martensite crystallography, and the application of this theory along with a variant selection criterion to determine the texture due to solid-state, displacive transformation. It is demonstrated that there remain difficulties which make a complete closure between theory and experiment unlikely. Progress is needed in relating the chemical and mechanical driving forces for phase transformation to the evolution of overall volume fractions of different crystallographic variants.

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Section: Variant Selectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematics of Crystallographic Texture in Martensitic and Related Transformations

Bhadeshia

Kundu

Abreu

2009

Microstructure and Texture in Steels

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“…Studies carried out to understand the underlying mechanisms of bainitic phase transformation and the resulting microstructure -texture -mechanical property relationship have focused either on transformation kinetics theory [1,[7][8][9][10][11][12][13], or the evolution of final transformation strains at the macroscopic scale and the corresponding stress-induced variant selection [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…However, when it comes to predicting the macroscopic transformation strains upon austenite-to-bainite phase transformation, the evolution of anisotropic strain throughout the transformation shall also be emphasized for a full understanding of the phase transformation processes. However, when it comes to predicting the macroscopic transformation strains upon austenite-tobainite phase transformations, the martensite transformation theory is often directly adopted and used for calculating the anisotropic strains [14][15][16][17]. Even though the corresponding results are reasonable in most cases, it is important to develop a theory consistent with the already established kinetics of the bainitic transformation, including the lattice deformation prevalent during the bainitic phase transformation [17,18].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Austenite-to-Martensite and Austenite-to-Bainite Phase Transformation Kinetics in Steels

Holzweißig

Uslu

Lambers

et al. 2013

Materials Research Letters

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This paper presents a comparison of the macroscopic transformation strain evolution as a function of the bainite and martensite phase fractions in steels. Specifically, the evolution of anisotropic strain with phase fraction follows a linear trend for the martensitic transformation due to continuous stress-induced variant selection. In the case of bainitic transformation, the anisotropic strain evolves non-linearly owing to diffusion, minimizing the distortion around the bainitic sheaves and further promoting stress-induced variant selection at the early stages of the bainitic phase transformation. However, this effectiveness is reduced when the bainitic sheaves start constricting the growth of each other.

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“…[1][2][3][4][5][6][7] The occurrence of transformation plasticity gives rise to the evolution of non-isotropic strain, which means the plastic strain along the stressed axis. The nonisotropic strain can be evaluated from the difference between the observed length change and that expected from the isotropic transformation strain as schematically shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Plastic Strain due to Isothermal Transformation from Austenite to Ferrite in IF and Low Carbon Steels

2007

Self Cite

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Apparent non-isotropic strain under external stress is quantified as a function of transformed fraction with dilatometric measurement and analysis for IF and low carbon steel. The non-isotropic strain of IF steel increases linearly with a transformed fraction, because fast transformation kinetics minimizes the contribution of creep in austenite and ferrite, and thereby the evolution of non-isotropic strain is mainly governed by transformation plasticity. For low carbon steel, the non-isotropic strain deviates from linear behavior in transformation segment where the creep in austenite and ferrite becomes remarkable due to the slow transformation kinetics. A diffusion controlled model describes well the effect of transformation kinetics on the evolution of non-isotropic strain during the transformation.

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A model for transformation plasticity during bainite transformation of steel under external stress

Cited by 65 publications

References 20 publications

Mathematics of Crystallographic Texture in Martensitic and Related Transformations

Mathematics of Crystallographic Texture in Martensitic and Related Transformations

A Comparative Analysis of Austenite-to-Martensite and Austenite-to-Bainite Phase Transformation Kinetics in Steels

Plastic Strain due to Isothermal Transformation from Austenite to Ferrite in IF and Low Carbon Steels

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