Effect of the Austenite Interface on Pearlite Transformation Behavior

Hiroshi Hasegawa; Tatsuya Nakagaito; Yoshimasa Funakawa

doi:10.4028/www.scientific.net/MSF.941.639

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HomeMaterials Science ForumMaterials Science Forum Vol. 941Effect of the Austenite Interface on Pearlite...

Effect of the Austenite Interface on Pearlite Transformation Behavior

Abstract:

The effect of the characteristics of austenite interface with ferrite on the pearlite transformation behaviour after intercritical annealing was investigated. Most austenite grains were situated mainly on ferrite grain boundaries and had the Kurdjumv-Sachs (K-S) or near K-S relationship to one of the neighbor ferrite grains before pearlite transformation. The pearlite transformation started mainly from the austenite grain boundary faced to ferrite. The pearlite transformation showed stasis. This indicates that some austenite is stabilized thermally against the pearlite transformation. The fraction of austenite having only the K-S or near K-S interface to neighbor ferrite grains was correspond to the fraction of austenite grains which does not include pearlite. The pearlite transformation was difficult to start from austenite interface having the K-S relationship to ferrite since the interface between austenite grains and ferrite grains was stabilized energetically in the case of their interface having the K-S relationship.

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Periodical:

Materials Science Forum (Volume 941)

Pages:

639-644

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.639

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Online since:

December 2018

Authors:

Hiroshi Hasegawa, Tatsuya Nakagaito, Yoshimasa Funakawa

Keywords:

Dual-Phase Steel, Intercritical Annealing, Interface, Orientation, Pearlite

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