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State of the retained austenite after thermomechanical processing a trip steel

Version 2 2024-06-03, 11:01
Version 1 2017-07-21, 11:45
conference contribution
posted on 2024-06-03, 11:01 authored by AZ Hanzaki, Peter HodgsonPeter Hodgson, S Yue, Que
Thermomechanical processing is an optimum production method to generate the desired mechanical properties of materials, since it combines deformation and heat treatment to control microstructural evolution. TRIP (Transformation-Induced-Plasticity) behavior is a powerful mechanism with which to improve in situ mechanical properties. The basis of TRIP behavior is the retention of austenite at room temperature. With this in mind, the present work concerns the effect of austenite history after TMP on the state of retained austenite. TMP was applied to a Nb bearing TRIP steel (0.22% C, 1.55% Mn, 1.55% Si and 0.035% Nb) in order to obtain statically and dynamically recrystallized, and pancaked austenite. These conditions were achieved by changing the Zener-Holloman, parameters, i.e. the strain rate and temperature of deformation. The austenite history has significant effects on substructure and properties of austenite grains. These, in turn, affect the alloying element partitioning and the ferrite formation characteristics. All these factors can influence the state of retained austenite and, accordingly, the TRIP properties.

History

Volume

30

Pagination

507-514

Location

Montreal, CA

Start date

1992-10-26

End date

1992-10-28

ISSN

0147-7781

ISBN-10

0932897827

Publication classification

EN.1 Other conference paper

Title of proceedings

Mechanical Working and Steel Processing Conference Proceedings

Publisher

Iron and Steel Society

Place of publication

New York

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