In situ observation of bainite growth during isothermal holding

Kang, M., Zhang, M. and Zhu, M. (2006) In situ observation of bainite growth during isothermal holding. Acta Materialia, 54 8: 2121-2129. doi:10.1016/j.actamat.2005.12.036


Author Kang, M.
Zhang, M.
Zhu, M.
Title In situ observation of bainite growth during isothermal holding
Journal name Acta Materialia   Check publisher's open access policy
ISSN 1359-6454
Publication date 2006-05-01
Sub-type Article (original research)
DOI 10.1016/j.actamat.2005.12.036
Open Access Status
Volume 54
Issue 8
Start page 2121
End page 2129
Total pages 9
Editor Gunter Gottstein
Subhash Mahajan
Place of publication Oxford
Publisher Pergamon-Elsevier Science Ltd
Language eng
Subject C1
291403 Alloy Materials
670899 Other non-ferrous metals (e.g. copper, zinc)
Abstract The mechanism of bainite growth has been investigated using in situ transmission electron microscopy observations. It was found that, in a number of alloys studied, a bainitic embryo is made of basic transformation units. These units are either a group of stacking faults or, in two dimensions, a series of parallelograms of different sizes. Thickening/widening of the bainite embryo takes place through shear along the stacking fault planes or twining planes. The bainite embryo is elongated by the formation of new transformation units at both tips of the bainite plate. The three-dimensional morphology of bainite is a convex tens-like lath. It is believed that the bainite embryo grows by shearing, which is controlled by the diffusion of solute atoms during the transformation. As the growth rate is much lower than that of martensite, it is therefore detectable. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Keyword bainite
transformation unit
defect plane
shear mechanism
superledge
Metallurgy & Metallurgical Engineering
Materials Science, Multidisciplinary
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 18:49:28 EST