Influence of compositional banding on grain anisotropy in 3CR12 steel
作者:
KnutsenR. D.,
期刊:
Materials Science and Technology
(Taylor Available online 1992)
卷期:
Volume 8,
issue 7
页码: 621-627
ISSN:0267-0836
年代: 1992
DOI:10.1179/mst.1992.8.7.621
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe microstructural evolution of a 12 wt-%Cr steel (3CR12) during cooling from a solution heat treatment at 1380°C has been investigated. Emphasis has been placed on determining the microstructural factors responsible for the persistent occurrence of grain anisotropy in this steel. Energy dispersive X-ray spectroscopy was used to determine the composition of the phases resulting from the solid stateδferrite to austenite transformation. It is shown that the high temperatureδferrite phase partially decomposes to austenite via a Widmanstätten growth mechanism and consequently a banded two phase structure is produced after hot rolling. The element partitioning, which arises during the solid stateδferrite decomposition, leads to irreversible compositional banding. An empirical model is proposed for the events leading to the generation of the banded phase structure and the formation of an elongated ferritic microstructure in 3CR12 after subcritical annealing.MST/1500
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