Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9796328 | Materials Science and Engineering: A | 2005 | 7 Pages |
Abstract
Alloy 718 is known to be sensitive to interdendritic segregation formed during ingot solidification. The occurrence of banded grain structures under heat treating conditions close to 1000â° C related to interdendritic segregation is often reported. In order to have a better understanding of this microstructural evolution, an extensive experimental program has been carried out. Consequently, a model taking into account the selective dissolution of δ-phase (Ni3Nb) is proposed. A grain growth simulation by Monte-Carlo method is then used to illustrate the grain structure evolution in a banded particle distribution. By comparing experimental data and computer simulation, the relationship between the Monte-Carlo step and the real time is assessed and the range of parameters when heterogeneous microstructures appear is specified.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Sébastien Coste, Eric Andrieu, Julitte Huez,