Isothermal Formation of Martensite at Subzero

Gupta, S.C.; Lement, B. S.

doi:10.1007/bf03397383

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…These have sometimes been called anisothermal (26) but the term is rarely used. In martensite which forms athermally, thermal energy is insufficient to initiate the transformation.…”

Section: Phase Transformationsmentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Materia Japan

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“…These have sometimes been called anisothermal (26) but the term is rarely used. In martensite which forms athermally, thermal energy is insufficient to initiate the transformation.…”

Section: Phase Transformationsmentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Materia Japan

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“…The isothermal mode of the martensitic transformation is now well (1,3,(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) .. ,. , w , • (6.7) ^ documented .…”

Section: Brief Survey Of Experimental Work On Isothermal Martensitementioning

confidence: 97%

“…The maximum initial rate of transformation takes place around -130° C. The total quantity of isothermal martensite observed is also a maximum at this temperature. (8) Das Gupta and Lemcnt noted that, in a 0, 7C -l3Cr steel, isothermal transformation is always preceded by sonu-atlu-rmal transformation and progresses by the formation of new lenticular plates rather than by the growth of existing ones.…”

Section: Brief Survey Of Experimental Work On Isothermal Martensitementioning

confidence: 99%

Measurement and Interpretation of Isothermal-Martensitic Kinetics

Raghavan¹,

Cohen²

1970

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“…There may be thermally activated processes which occur on continuous cooling. These have sometimes been called anisothermal 48) but the term is rarely used. In martensite which forms athermally, thermal energy is insufficient to initiate the transformation.…”

Section: Isothermal Martensitic Transformations: -Is Ther-mentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Mater. Trans.

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Several interesting features in the study of stabilities of phases, and in phase transformations, are discussed. It is proposed that symmetry considerations related to the presence of magnetism in iron suggests that the respective phases, BCC alpha and FCC gamma, have in fact lower symmetries than cubic. A proposal is made that the symbol beta used in the past for the designation of the paramagnetic BCC iron should perhaps be returned as a feature in phase diagrams. The importance of the new concept of a 'pseudogap' in the electronic band structure, as a stabilizing electronic feature, is discussed in the light of the Hume-Rothery electron concentration rule. It is proposed that since the thermal activation is a major feature in the behavior of isothermal martensites, a more suitable designation for these types of phase transformations might be ''thermally activated martensites'', or TAMs. Massive transformations are discussed briefly and it is emphasized that they present a specific example of an idiomorphic transformation process, not requiring the need for orientation relationships (ORs) between the parent and product phases.

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Isothermal Formation of Martensite at Subzero

Cited by 9 publications

References 2 publications

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Measurement and Interpretation of Isothermal-Martensitic Kinetics

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

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