Crystallography of carbide-free bainite in a hard bainitic steel

Zhang, M. and Kelly, P. M. (2006) Crystallography of carbide-free bainite in a hard bainitic steel. Materials science and engineering. A, Structural materials: properties, microstructure and processing, 438-440 SPEC. ISS.: 272-275. doi:10.1016/j.msea.2006.05.022


Author Zhang, M.
Kelly, P. M.
Title Crystallography of carbide-free bainite in a hard bainitic steel
Journal name Materials science and engineering. A, Structural materials: properties, microstructure and processing   Check publisher's open access policy
ISSN 0921-5093
Publication date 2006-11-25
Sub-type Article (original research)
DOI 10.1016/j.msea.2006.05.022
Volume 438-440
Issue SPEC. ISS.
Start page 272
End page 275
Total pages 4
Editor G. Kostorz
M. Kato
Place of publication Switzerland
Publisher Elsevier SA
Language eng
Subject C1
291302 Physical Metallurgy
670899 Other non-ferrous metals (e.g. copper, zinc)
Abstract The convergent beam Kikuchi line diffraction technique has been used to accurately determine the orientation relationships between bainitic ferrite and retained austenite in a hard bainitic steel. A reproducible orientation relationship has been uniquely observed for both the upper and lower bainite. It is [GRAPHICS] However, the habit plane of upper bainite is different from that of lower bainite. The former has habit plane that is either within 5 degrees of (221)(A) or of (259)(A). The latter only corresponds with a habit plane that is within 5 degrees of (259)(A). The determined orientation relationship is completely consistent with reported results determined using the same technique with an accuracy of +/- 0.5 degrees in lath martensite in an Fe-20 wt.% Ni-6 wt.% Mn alloy and in a low carbon low alloy steel. It also agrees well with the orientation relationship between granular bainite and austenite in an Fe-19 wt.% Ni-3.5 wt.% Mn-0.15 wt.% C steel. Hence it is believed that, at least from a crystallographic point view, the bainite transformation has the characteristics of martensitic transformation. (c) 2006 Elsevier B.V. All rights reserved.
Keyword Nanoscience & Nanotechnology
Orientation relationship
Carbide-free bainite
Lath martensite
Kikuchi diffraction
Materials Science, Multidisciplinary
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 20:43:25 EST