NDLI: Di ff usion – Controlled Growth of Pearlite in Ternary Steels

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Di ff usion – Controlled Growth of Pearlite in Ternary Steels

Content Provider	Semantic Scholar
Author	Pandit, Ashwin Suresh Bhadeshia, H. K. D. H.
Copyright Year	2011
Abstract	A theory for the diffusion–controlled growth of pearlite in steels containing manganese is presented and assessed in the light of experimental data. Given the overwhelmingly rapid diffusivity that a substitutional solute has within the transformation front, the growth rate is found to be dominated by diffusion parallel to the interface with austenite as the rate controlling step. The relevant interfacial diffusion parameters have been derived by fitting experimental data to kinetic theory. All reported measurements of pearlite growth where the full set of necessary parameters have been listed, are shown to be inconsistent with mechanisms which do not involve the partitioning of substitutional solutes. The method adopted here, which is based on local equilibrium at the transformation interface with the long–range partitioning of substitutional solutes by migration within the interface, has been shown to reasonably explain experimental data over a range of temperatures and chemical compositions.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.msm.cam.ac.uk/phase-trans/2011/ternary_Pandit_PRS_2011.pdf
Alternate Webpage(s)	http://rspa.royalsocietypublishing.org/content/royprsa/early/2011/05/10/rspa.2011.0165.full.pdf
Language	English
Access Restriction	Open
Subject Keyword	Composition Entity Name Part Qualifier - adopted Equilibrium Interface Device Component Kinetics Partition (database) Ploidies Steel solute
Content Type	Text
Resource Type	Article

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