Stress affected bainitic transformation in a FeCSiMn alloy

Matsuzaki, Akiyoshi; Bhadeshia, H. K. D. H.; Harada, Hisashi

doi:10.1016/0956-7151(94)90125-2

Cited by 97 publications

(67 citation statements)

References 13 publications

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“…That displacive transformations produce highly anisotropic strains when variant selection is significant has been demonstrated experimentally [37][38][39]. • An important outcome of the fact that transformation strains can be calculated using the crystallographic set of martensite is that such strains can be exploited as an alternative or supplemental method of assessing texture.…”

Section: Transformation Plasticitymentioning

confidence: 99%

Calculation of crystallographic texture due to displacive transformations

Bhadeshia

Abreu

Kundu

2008

International Journal of Materials Research

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Displacive transformations involve the disciplined motion of atoms. As a result, there are clearly defined relationships between all aspects of the parent and product lattices. The theory for this is well established but has not been exploited in the calculation of transformation textures. This paper is a critical assessment of the methods for the estimation of crystallographic textures during the displacive transformation of austenite into martensite, bainite or Widmanstätten ferrite in steels. The discussion is limited to the case where austenite is not in a plastically deformed state prior to its transformation.

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Section: Transformation Plasticitymentioning

confidence: 99%

Calculation of crystallographic texture due to displacive transformations

Bhadeshia

Abreu

Kundu

2008

International Journal of Materials Research

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“…Matsuzaki et al have also reported that in a FeCSiMn alloy bainitic ferrite transformation kinetics in isothermal condition have been accelerated by applying external loads. [29] At lower temperatures, martensite forms at a high transformation rate. In the 50, 100, and 150 N thermal-mechanical cycles, the applied stress is lower than the yield stress of the material, and by increasing the load from 50 to 100 and 150 N, M s increases and the volume fraction of the ferrite phase before reaching M s is relatively low.…”

Section: Discussionmentioning

confidence: 99%

In-Situ Synchrotron X-ray Diffraction Studies on Effects of Plastic and Elastic Loading on bcc Phase Transformations of a 3rd Generation 1 GPa Advanced High Strength Steel

Eftekharimilani

Huizenga

Kim

et al. 2017

Metall Mater Trans A

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In this paper, we describe the effects of mechanical loading on bcc-to-bcc phase transformations of an Advanced High Strength Steel during cooling. In-situ synchrotron diffraction was employed to measure time-temperature-load diffraction patterns. Calculations were made of the volume fractions of the phases, the transformation kinetics, and the austenite lattice parameter during cooling and simultaneous loading. In addition, volume fractions and lattice parameters of retained austenite at room temperature under different loading conditions were obtained. The results show that applying a load during cooling of the fcc phase significantly increases the volume fraction of a bcc phase before the start of the martensitic transformation. The kinetics of phase transformations were affected by the applied loads. The volume fraction and lattice parameter of retained austenite at room temperature vary in different samples and the highest retained austenite and the largest lattice parameter were obtained in the sample subjected to the highest load.

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“…7 for uniaxial tension and compression. That displacive transformations produce highly anisotropic strains when variant selection is significant has been demonstrated experimentally [28][29][30]. Fig.…”

Section: Transformation Plasticitymentioning

confidence: 91%

“…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%

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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Stress affected bainitic transformation in a FeCSiMn alloy

Cited by 97 publications

References 13 publications

Calculation of crystallographic texture due to displacive transformations

Calculation of crystallographic texture due to displacive transformations

In-Situ Synchrotron X-ray Diffraction Studies on Effects of Plastic and Elastic Loading on bcc Phase Transformations of a 3rd Generation 1 GPa Advanced High Strength Steel

Mathematics of Crystallographic Texture in Martensitic and Related Transformations

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