On the importance of local equilibria in alloy design criteria for bulk nano-pearlitic steels and ensuing mechanical properties

A critical review of the dependence of yield strength of pearlite on interlamellar spacing unveils the contribution of solid solution strengthening of ferrite. In order to understand the evolution of solute content within pearlitic ferrite, importance of various local equilibria modes (assumed to pe...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-04, Vol.841, p.143034, Article 143034
Main Authors: Tripathy, Snehashish, Sahu, Vikash Kumar, Jena, P.S. Manoranjan, Tarafder, Soumitro, Ghosh Chowdhury, Sandip
Format: Article
Language:English
Subjects:
Alloy development
Bulk nano-pearlite
Cooling
Design criteria
Ferrite
Interlamellar spacing
Local equilibria
Mechanical properties
No-partitioning
Partitioning
Pearlite
Room temperature
Scanning transmission electron microscopy
Solid solutions
Solution strengthening
Steel
Yield strength
Yield stress
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Summary:A critical review of the dependence of yield strength of pearlite on interlamellar spacing unveils the contribution of solid solution strengthening of ferrite. In order to understand the evolution of solute content within pearlitic ferrite, importance of various local equilibria modes (assumed to persist during transformation) has been realized and revisited in present work. With this understanding, an alloy composition and corresponding two stage cooling process have been designed to have nano-pearlitic microstructure (interlamellar spacing
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2022.143034