Non-equilibrium solidification and ferrite in δ-TRIP steel

Author： Yi H. L.   Ghosh S. K.   Liu W. J.   Lee K. Y.   Bhadeshia H. K. D. H.  

Publisher： Maney Publishing

ISSN： 1743-2847

Source： Materials Science and Technology, Vol.26, Iss.7, 2010-07, pp. : 817-823

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Microscopy and microanalysis experiments on two cast alloys, designed on the basis of equilibrium to contain substantial amounts of δ-ferrite, reveal zero or much reduced fractions of this phase in the solidified condition. It appears that the solid state transformation of δ-ferrite into austenite occurs without the required partitioning of solutes and that this is responsible for the development of non-equilibrium microstructures. This conclusion is supported by microanalytical data and through calculations of limiting phase diagrams based on paraequilibrium rather than equilibrium. Kinetic simulations confirm that this interpretation is consistent with the majority of austenite growing in the solid state without the partitioning of the substitutional solutes.

Related content

δ TRIP steel

By Chatterjee S.   Murugananth M.   Bhadeshia H. K. D. H.  

Materials Science and Technology, Vol. 23, Iss. 7, 2007-07 ,pp. : 819-827 (9)

Maney Publishing

Access to resources Recommend Favorite

Stabilisation of ferrite in hot rolled δ-TRIP steel

By Yi H L   Lee K Y   Bhadeshia H K D H  

Materials Science and Technology, Vol. 27, Iss. 2, 2011-02 ,pp. : 525-529 (5)

Maney Publishing

Access to resources Recommend Favorite

Visual analysis of solidification and δ-γ transformations in steels

By Zhang X F   Komizo Y  

Materials Science and Technology, Vol. 29, Iss. 5, 2013-05 ,pp. : 631-635 (5)

Maney Publishing

Access to resources Recommend Favorite

Non-equilibrium intergranular segregation in ultra low carbon steel

By Zhang Z.L.   Lin Q.Y.   Yu Z.S.  

Materials Science and Technology, Vol. 16, Iss. 3, 2000-03 ,pp. : 305-308 (4)

Maney Publishing

Access to resources Recommend Favorite

In situ neutron diffraction during tensile straining of fine grained ferrite - pearlite steel

By Ono T.   Tomota Y.   Lukas P.   Lugovy D.   Neov D.   Tsuchida N.   Nagai K.  

Materials Science and Technology, Vol. 20, Iss. 1, 2004-01 ,pp. : 121-125 (5)

Maney Publishing

Access to resources Recommend Favorite