☆ 4.7 Article

Influence of partial replacement of Si by Al on the change of phase fraction during heat treatment of TRIP steels

SCRIPTA MATERIALIA (2007)

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Journal

SCRIPTA MATERIALIA
Volume 57, Issue 12, Pages 1097-1100

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.08.022

Keywords

TRIP steels; heat treatment; phase fraction; dilatometry; metallography

Categories

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

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We have investigated the change of phase fraction during heat treatment for Fe-C-Mn-Si and Fe-C-Mn-Si-Al transformation-induced plasticity (TRIP) steels. Combined metallographic and dilatometric analysis reveals that partial replacement of Si with Al enhances ferrite formation from austenite during subsequent heat treatment after intercritical annealing. The increase in ferrite fraction by Al addition is ascribed to the acceleration of the growth of intercritical ferrite as well as the formation of bainitic ferrite. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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