Application of the theory of martensite crystallography to displacive phase transformations in substitutional nonferrous alloys

Muddle, Barrington Charles; Nie, J. F.; Hugo, G. R.

doi:10.1007/bf02649032

Cited by 73 publications

(33 citation statements)

References 45 publications

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“…Within experimental scatter, the lattice parameter appears to have inflated only very slightly up to Al contents of 1.8 wt.%, in agreement with the verdict of Raub and Walter [15]. For comparison, the value of a listed in the literature for (Au,Cu) with 1:1 stoichiometry varies from 0.387 nm [16] to 0.388 nm [6].…”

Section: The α Phase Fieldsupporting

confidence: 65%

Determination of the 76 wt.% Au section of the Al–Au–Cu phase diagram

Levey¹,

Cortie²,

Cornish³

2003

Journal of Alloys and Compounds

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Section: The α Phase Fieldsupporting

confidence: 65%

Determination of the 76 wt.% Au section of the Al–Au–Cu phase diagram

Levey¹,

Cortie²,

Cornish³

2003

Journal of Alloys and Compounds

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“…[20][21][22]25,84) Since these properties appear to be very close to those for martensite, the displacive mechanism has been one of the most prevailing models for bainite transformation.…”

Section: Displacive Modelmentioning

confidence: 99%

“…The lattice change (Bain deformation) occurs in a reconstructive manner with the atomic-site correspondence at the interphase boundary. The elastic strain at the interphase boundary due to the lattice change is relaxed by introducing lattice invariant shears as described by Muddle et al 25,104) and Ohmori et al 105,81,84) This model can explain most features on platelike products such as morphology, crystallography and also kinetic properties except the dislocation arrangements on the broad face of them. It should be emphasised that, as described earlier, the definition of bainite is confined to the initially formed structure and the secondary surface modification by diffusional interface migration is not involved in bainite in the present report.…”

Section: Intermediate Modelmentioning

confidence: 99%

“…In addition, it was demonstrated that even in a diffusional transformation invariant-plane strain (IPS) type surface reliefs of the product phase can often be observed, 19) and the phenomenological theory of martensite can be applied to such transformations. [20][21][22][23][24][25] Thus the morphological and crystallographic similarities between martensitic and bainitic transformations have led to the stimulating discussions on the mechanism of bainite transformations. It should be noted that the habit plane of platelike products is determined uniquely by fixing the orientation relationship between austenite, ferrite and cementite.…”

Section: Introductionmentioning

confidence: 99%

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Advances in Physical Metallurgy and Processing of Steels. Microstructural Evolutions with Precipitation of Carbides in Steels.

Ohmori

2001

ISIJ International

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The studies on the crystallographic features of diffusional transformation of austenite in various steels have been reviewed. A primary ferrite forming at an austenite grain boundary is related to at least one of the austenite grains separated by the boundary with the Bain correspondence. In the case of the microstructures containing both ferrite and carbides such as pearlite, degenerate pearlite, interphase precipitation of alloy carbides, and upper and lower bainites, the crystallographic relationships between ferrite and carbides provide further information to elucidate the transformation mechanisms. In the present report, therefore, the orientation relationships between ferrite, carbide and austenite as well as the habit planes of platelike transformation products and the mechanisms of transformations are discussed.

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“…Such accommodation is often seen in precipitation processes accompanying shear displacement. 8) When volume change is accompanied, long-range diffusion is needed for complete relaxation.…”

Section: Introductionmentioning

confidence: 99%

Discussion on Strain Accommodation Associated with Formation of LPSO Structure

2013

Mater. Trans.

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Plate-shaped precipitates accompanying change of chemical composition/order exhibit characteristics of displacive transformation when stacking sequence changes. One of intrinsic nature of long-period stacking ordered (LPSO) structures is, regular arrangements of stacking faults should cause significant change in local elastic strain field. This study intends to discuss problems of elastic strain in associated with LPSO structure and plastic accommodation processes by diffusion. It is indicated that required time for strain accommodation through boundary diffusion is negligibly small whereas that for volume diffusion is comparable to aging time where LPSO structure are formed via precipitation from the supersaturated Mg matrix. However, high degree of coherency between the fcc-base structural unit in the LPSO structure and Mg matrix, high-speed diffusion path for diffusional accommodation cannot be provided and thus, the volume diffusion controlled process or selfaccommodation by combination of structural units with alternative shears should be dominant. The observation of 14H or 10H-type LPSO structure by aging clearly indicates such strain accommodation during sequence of precipitation.

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Application of the theory of martensite crystallography to displacive phase transformations in substitutional nonferrous alloys

Cited by 73 publications

References 45 publications

Determination of the 76 wt.% Au section of the Al–Au–Cu phase diagram

Determination of the 76 wt.% Au section of the Al–Au–Cu phase diagram

Advances in Physical Metallurgy and Processing of Steels. Microstructural Evolutions with Precipitation of Carbides in Steels.

Discussion on Strain Accommodation Associated with Formation of LPSO Structure

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