On the use of geometric parameters in the theory of interphase boundaries

Knowles, K. M.; Smith, Daniel; Clark, W.A.T.

doi:10.1016/0036-9748(82)90163-6

Cited by 30 publications

(7 citation statements)

References 17 publications

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“…In these methods, either the interfacial plane, or a line on the interface, remains invariant, i.e., the interface plays the dominant role in determining the OR. These ideas appear to work for some systems while they fail for others (Knowles et al, 1982).…”

Section: Three-dimensional Orientation Relationshipmentioning

confidence: 97%

High resolution transmission electron microscopy studies of metal/ceramics interfaces

Ikuhara

Pirouz

1998

Microsc. Res. Tech.

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Section: Three-dimensional Orientation Relationshipmentioning

confidence: 97%

High resolution transmission electron microscopy studies of metal/ceramics interfaces

Ikuhara

Pirouz

1998

Microsc. Res. Tech.

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“…The angle φ must be such as to lie on the curve in order to ensure an invariant line [31]. KS occurs at a γ /a α ′ = 1.2247.…”

Section: Crystallographic Theory: Orientation Relationshipsmentioning

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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“…and thus, 24 different crystallographic variants of bainite or martensite can form within one former austenite grain. Both theories, however, provide only approximate solutions since the actual crystallographic orientation relationships must be irrational [27] in succession of twinning and/or slip within the martensitic or bainitic structures. Accordingly, the representation of the phase transformation processes by these orientation relationships is only an approximate solution.…”

Section: Theorymentioning

confidence: 99%

“…This can be attributed to an interaction between the individual variants growing within a single grain, which eventually leads to deviations from the theoretically calculated product orientations [28,29]. Furthermore, the K-S orientation relationship does not represent an exact solution of the phase transformations as the actual orientation relationship is irrational [27]. In order to independently verify the suggested approach, it would be reasonable to apply the procedure to phase transformations in high-manganese or stainless steels in which the displacement of the austenite-to-martensite phase transformation can be detected through in situ experiments at room temperature.…”

Section: Reverse Calculation Of the Parent Austenite Crystal Orientat...mentioning

confidence: 99%

Computation of parent austenite grain orientation from product grain orientations upon displacive phase transformations

Holzweißig

Canadinç

Maier

2013

Modelling Simul. Mater. Sci. Eng.

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A reverse computation procedure is proposed for calculating parent austenite orientations, which are experimentally challenging to obtain, based on the final texture after austenite-to-bainite and austenite-to-martensite phase transformations. Specifically, post-transformation electron backscatter diffraction scans of bainite and martensite were carried out in order to identify the product crystal orientations within a single former austenite grain. Subsequently, the Kurdjumov–Sachs relationship was utilized to compute the parent austenite crystal orientation based on these data. The proposed method provided a unique solution for the initial austenite grain orientation in most of the cases. Overall, the proposed computational procedure constitutes a means of understanding the factors influencing microstructural evolution in displacive phase transformations.

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On the use of geometric parameters in the theory of interphase boundaries

Cited by 30 publications

References 17 publications

High resolution transmission electron microscopy studies of metal/ceramics interfaces

High resolution transmission electron microscopy studies of metal/ceramics interfaces

Calculation of crystallographic texture due to displacive transformations

Computation of parent austenite grain orientation from product grain orientations upon displacive phase transformations

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