Study of the Role of the Interface Coherence on the Hot Deformation Behaviour of Duplex Stainless Steels

The Kurdjumov-Sach orientation relationship found between the delta ferrite and the austenite in the as cast duplex stainless steel seems to be related to the low ductility of this material on hot working. The crack formation at the gamma / alpha interphase is explained by means of coherence stresse...

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Bibliographic Details
Published in:Key engineering materials 1996-11, Vol.127-131, p.1033-1042
Main Authors: Piñol-Juez, A., Urcola, J.J., Iza-Mendia, Amaia, Gutiérrez, Isabel
Format: Article
Language:English
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Summary:The Kurdjumov-Sach orientation relationship found between the delta ferrite and the austenite in the as cast duplex stainless steel seems to be related to the low ductility of this material on hot working. The crack formation at the gamma / alpha interphase is explained by means of coherence stresses concentrated at a stepped semicoherent boundary, giving rise to a nonhomogeneous partition of the deformation between the phases. In absence of DRX, it is found that both the increase of the previous hot rolling reduction and the static recrystallization in the austenite improve the hot ductility of these materials. Chemical composition of steel (in wt%): 0.025C-1.3Mn-23Cr-4.8Ni-0.22Mo-0.095N.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.127-131.1033