NDLI: Austenite Grain Structures in Ti- and Nb-Containing High-Strength Low-Alloy Steel During Slab Reheating

Content Provider	Springer Nature Link
Author	Roy, S. Chakrabarti, D. Dey, G. K.
Copyright Year	2012
Abstract	Austenite-grain growth was investigated in a couple of microalloyed steels, one containing Ti and the other containing Nb, Ti, and V, using different reheating temperatures between 1273 K and 1523 K (1000 °C and 1250 °C). Nature and distribution of microalloy precipitates were quantitatively analyzed before and after reheating. Interdendritic segregation (or microsegregation) during casting can result in an inhomogeneous distribution of microalloy precipitates in the as-cast slabs, which can create austenite grain size variation (even grain size bimodality) after reheating. Ti addition reduced the grain size variation; however, it could not eliminate the grain size bimodality in Nb-containing steel, due to the differential pinning effect of Nb precipitates. A model was proposed for the prediction of austenite grain size variation in reheated steel by combining different models on microsegregation during solidification, thermodynamic stability, and dissolution of microalloy precipitates and austenite grain growth during reheating.
Starting Page	717
Ending Page	728
Page Count	12
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	44
Issue Number	2
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2012-10-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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Development of Bimodal Grain Structures in Nb-Containing High-Strength Low-Alloy Steels during Slab Reheating

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