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On the mechanism of cementite dissolution in austenite
Author(s) -
Małecki Paweł,
Barbacki Andrzej
Publication year - 1988
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198801617
Subject(s) - cementite , dissolution , metallurgy , austenite , chromium , carbon fibers , diffusion , manganese , chemistry , materials science , thermodynamics , composite material , physics , microstructure , composite number
Four basic stages of the dissolution process of chromium containing cementite can be distinguished. In the initial stage stresses are built up around cementite particles because of inadequate iron diffusion (in comparison with carbon diffusion). Then, the stress relief occurs, due to diminishing carbon gradient at the interface and subsequently due to chromium diffusion, which controls the dissolution rate during the third, comparatively the slowest, period of dissolution. During the final stage, quick dissolution of cementite takes place, controlled by the interface energy.