INTERFACES IN PHASE TRANSFORMATIONS

Acta Metall Sin

1997, Vol. 33

Issue (2): 150-156 DOI:

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INTERFACES IN PHASE TRANSFORMATIONS

J.W.Christian FRS（Department of Materials; Oxford University; Parks Road; Oxford OX1 3PH; UK）

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J.W.Christian FRS（Department of Materials; Oxford University; Parks Road; Oxford OX1 3PH; UK）. INTERFACES IN PHASE TRANSFORMATIONS. Acta Metall Sin, 1997, 33(2): 150-156.

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Abstract The classification of interfaces in various kinds of phase transformation is discussed.Reconstructive phase transformations have incoherent interfaces and there is no systematic change of shape of the product region. Displacive phase transformations have fully coherent or partly coherent interfaces and are detectable by the change of shape.Fully coherent interfaces include martensitic types in which there is no change of composition and diffusional displacive interfaces in which a change of composition occurs.Both types of interface migrate by the motion of steps or ledges which are also called transformation dislocations in the martensite case. Partly coherent interfaces are also martensitic or diffusional. although examples of the latter type are rare.

Key words: interface martensitic transformation bainitic transformation

Received: 18 February 1997

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