Crystallographic analysis of ferrous martensite morphology

Ohmori, Yasuya

doi:10.1080/01418618808204519

Cited by 10 publications

(1 citation statement)

References 18 publications

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“…85,86) The formation of lath martensite with these {111} f to {557} f habit planes could be explained in a similar fashion described above for bainitic ferrite. 87) However it should be noted that the habit plane, at least the broad face, of the present lath martensite is far from {110} b //{111} f and close to {112} b . In the theory of martensite crystallography, 76) this {112} b ferrite plane should lie within a stereographic triangle consisting of the (010) f , the (011) f and the (111) f //(011) b when the following Kurdjumov-Sachs relationship holds:…”

Section: Crystallography Of Lath Martensitementioning

confidence: 99%

A Kinetic and Electronmicroscopic Study of Transformations in Continuously Cooled Fe-15%Ni Alloys.

2001

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Koistinen and Marburger's equation relating volume fraction of athermal martensite to temperature has been applied to diffusional transformation dilatometry data obtained on continuous cooling Fe-15%Ni alloys. After austenitising for 1 h at 1 000°C and cooling at 50 K/min (0.83 K/s), grain boundary nucleated massive ferrite was observed which developed into Widmanstätten ferrite with a ferrite habit plane of {110} b for temperatures between 372°C and 352°C. On cooling at 44 K/s from 1 000°C bainitic ferrite was observed for temperatures below 360°C. There was some retained austenite in this bainitic structure giving a ferrite habit plane of {110} b parallel to the austenite plane {111} f . Cooling at the same rate, 44 K/s from 1 200°C gave lath martensite below the M s of 261°C with a ferrite habit plane of {112} b . Superlattice spots corresponding to the DO 3 or B2 structure were observed in electron diffraction patterns on cooling at 50 K/min (0.83 K/s) and 44 K/s from 1 000°C.

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Section: Crystallography Of Lath Martensitementioning

confidence: 99%

A Kinetic and Electronmicroscopic Study of Transformations in Continuously Cooled Fe-15%Ni Alloys.

2001

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Morphology and properties of low-carbon bainite

et al. 1990

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Martensite crystallography—the apparent controversy between the infinitesimal deformation approach and the phenomenological theory of martensitic transformations

Kelly

2003

Metall Mater Trans A

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The aim of this article is to demonstrate that the apparent controversy between the infinitesimal deformation (ID) approach and the phenomenological theory of martensitic transformations (PTMTs) in predicting the crystallographic characteristics of a martensitic transformation is entirely based on unjustified approximations associated with the way in which the ID calculations are performed. When applied correctly, the ID approach is shown to be absolutely identical to the PTMT. Nevertheless, there may be some advantages in using the ID approach. In particular, it is somewhat simpler than the PTMT; it is based on a physical concept that is easier to understand and, most important, it may provide a tool for investigating some of the features of martensitic transformations that have eluded explanation via the PTMT.

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Crystallographic analysis of ferrous martensite morphology

Cited by 10 publications

References 18 publications

A Kinetic and Electronmicroscopic Study of Transformations in Continuously Cooled Fe-15%Ni Alloys.

A Kinetic and Electronmicroscopic Study of Transformations in Continuously Cooled Fe-15%Ni Alloys.

Morphology and properties of low-carbon bainite

Martensite crystallography—the apparent controversy between the infinitesimal deformation approach and the phenomenological theory of martensitic transformations

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