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Mechanical Behavior on Micro-compression Test in Ultra-low Carbon Steel Produced by High Pressure Torsion

Published online by Cambridge University Press:  25 March 2011

Takashi Nagoshi ,
Akinobu Shibata ,
Masato Sone  and
Yoshikazu Todaka
Takashi Nagoshi
Affiliation:
Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Akinobu Shibata
Affiliation:
Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
Masato Sone
Affiliation:
Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Yoshikazu Todaka
Affiliation:
Toyohashi University of Technology, Toyohashi 441-8580, Japan
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Abstract

Mechanical behavior of ultra-fine grained (UFG) steel fabricated by high pressure torsion (HPT) was investigated by micro-sized compression test of a micro-sized pillar with uniform dimensions (non-tapered, non-filleted) carefully fabricated by FIB milling. After HPT process, grains were elongated to shear direction and its grain size was decreased down to 300 nm in diameter with increasing strain amount. Compression test confirmed that the uniform elongations of ultra-fine grained materials were lower than 3% and do not depend on the grain size.

Keywords

Femicrostructureductility
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1297: Symposium P – Deformation Mechanisms, Microstructure Evolution and Mechanical Properties of Nanoscale Materials , 2011 , mrsf10-1297-p10-33
Copyright
Copyright © Materials Research Society 2011

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References

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