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Bulk nanocrystalline stainless steel fabricated by equal channel angular pressing

Published online by Cambridge University Press:  01 July 2006

C.X. Huang ,
Y.L. Gao ,
G. Yang ,
S.D. Wu ,
G.Y. Li  and
S.X. Li
C.X. Huang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
Y.L. Gao
Affiliation:
Central Iron and Steel Research Institute, Beijing 100081, People's Republic of China
G. Yang
Affiliation:
Central Iron and Steel Research Institute, Beijing 100081, People's Republic of China
S.D. Wu*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
G.Y. Li
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
S.X. Li
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
*
a)Address all correspondence to these authors. e-mail: cx_huang@imr.ac.cn
b)Address all correspondence to these authors. e-mail: shdwu@imr.ac.cn
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Abstract

Bulk fully nanocrystalline grain structures were successfully obtained in ultralow carbon stainless steel by means of equal channel angular pressing at room temperature. Transmission electron microscopy (TEM) and high-resolution TEM investigations indicated that two types of nanostructures were formed: nanocrystalline strain-induced martensite (body-centered cubic structure) with a mean grain size of 74 nm and nanocrystalline austenite (face-centered cubic structure) with a size of 31 nm characterized by dense deformation twins. The results about the formation of fully nanocrystalline grain structures in stainless steel suggested that a low stacking fault energy is exceptionally profitable for producing nanocrystalline materials by equal channel angular pressing.

Keywords

Grain sizeMicrostructureTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 7 , July 2006 , pp. 1687 - 1692
Copyright
Copyright © Materials Research Society 2006

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References

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