期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 422, 期 1-2, 页码 232-240出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2006.02.003
关键词
nucleation; growth; tempering; solute-depleted zone; martensitic steel
A numerical model of competitive precipitation at grain boundaries, or more specifically at lath boundaries, on dislocations and in the matrix was developed to simulate Cu precipitation during tempering of low carbon martensitic steels. The Cu nucleus was assumed to be a bee cluster at all nucleation sites. The influence of solute-depletion around the lath boundaries and dislocations on the precipitation in the matrix was taken into account. Because of the high density of dislocations and the small lath size both nucleation and growth of Cu particles in the matrix tend to be suppressed, and in some cases particles in the matrix dissolved at prolonged holding. These results seem to be consistent with experimental observations reported in the literature. (c) 2006 Elsevier B.V. All rights reserved.
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