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Analysis and characterization by electron backscatter diffraction of microstructural evolution in the adiabatic shear bands in Fe–Cr–Ni alloys

Published online by Cambridge University Press:  31 January 2011

Huajie Yang ,
Yongbo Xu ,
Yasuaki Seki ,
Vitali F. Nesterenko  and
Marc André Meyers
Huajie Yang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Yongbo Xu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Marc André Meyers
Affiliation:
University of California, San Diego, La Jolla, California 92093-0411
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The microstructural evolution inside adiabatic shear bands in Fe–Cr–Ni alloys dynamically deformed (strain rates > 104 s−1) by the collapse of an explosively driven, thick-walled cylinder under prescribed strain conditions was examined by electron backscatter diffraction. The observed structure within the bands consisted of both equiaxed and elongated grains with a size of ∼200 nm. These fine microstructures can be attributed to recrystallization; it is proposed that the elongated grains may be developed simultaneously with localized deformation (dynamic recrystallization), and the equiaxed grains may be formed subsequently to deformation (static recrystallization). These recrystallized structures can be explained by a rotational recrystallization mechanism.

Keywords

Grain sizeNucleation & growth
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 8 , August 2009 , pp. 2617 - 2627
Copyright
Copyright © Materials Research Society 2009

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