Interface dynamics in diffusion-driven phase transformations for metallic systems

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90251-8· OSTI ID:7045557

Pieraggi, B ^[1]; Rapp, R A ^[2]; Hirth, J P ^[3]

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1. ENSC Toulouse (France). Lab. des Materiaux
2. Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
3. Washington State Univ., Pullman, WA (United States). Dept. of Mechanical and Materials Engineering

The role of interfacial defects in effecting the interfacial growth of phases involved in diffusion-driven phase transformations has been analyzed. The interfacial growth or recession of a phase is tied to the climb of interfacial misorientation dislocations for the given phase, with the associated diffusion steps concentrated in the interface. For the diffusion-driven transformation, the interface needs to accomplish three interrelated tasks: (1), achieve the necessary composition change, (2), produced the required structure change, and (3), create/annihilate vacancies at a rate consistent with the arriving diffusion fluxes.

• OSTI ID: 7045557
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:11; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIFFUSION
DISLOCATIONS
ELEMENTS
GRAIN ORIENTATION
LINE DEFECTS
METALS
MICROSTRUCTURE
ORIENTATION
PHASE TRANSFORMATIONS
POINT DEFECTS
VACANCIES