Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
Regular Article
Hierarchical Characterization by EBSD and Neutron Diffraction on Heterogeneous Deformation Behavior of a Martensitic Steel
Satoshi MorookaYo TomotaYoshitaka AdachiShigekazu MoritoTakashi Kamiyama
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2008 Volume 94 Issue 8 Pages 313-320

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Abstract

A novel combined technique of neutron diffraction and electron back scattering diffraction was applied to examine hierarchical deformation behavior of 18 mass% Ni martensitic steel. In-situ neutron diffraction experiment during tensile deformation demonstrated that intergranular stress was generated. EBSD analysis suggested that slip bands terminated not only at block boundaries, but also sub-block boundaries at a relatively small strain. In many cases, slip bands crossing sub-block boundaries were zigzagged. With increasing strain, sub-block became unclear and then block boundaries worked as a main barrier for dislocation gliding. Such kind of heterogeneous plastic flow in differently oriented hkl blocks seems to be a possible reason for the intergranular stresses.

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© 2008 The Iron and Steel Institute of Japan
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