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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.8 (2001)  >  pp.1582-1587

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The Liquid-Enhanced Plasticity and Deformation Behavior of Cu-Mg-TiC Nanocrystalline Composite

Baolong Shen1), Tohru Yamasaki2), Yoshikiyo Ogino2), Hisamichi Kimura1) and Akihisa Inoue1)
1) Institute for Materials Research, Tohoku University
2) Departmant of Materials Science and Engineering, Faculty of Engineering, Himeji Institute of Technology

Cu–Mg–TiC bulk nanocrystalline composites were prepared by mechanical alloying, HIP process and hot-rolling. Tensile tests at constant crosshead speeds were carried out using a universal testing machine at several different temperatures under an argon atmosphere. The elongation drastically increased as the fraction of melt increased, and a maximum nominal elongation of about 200% was obtained at temperature where atomic fraction of liquid phase was about 0.5 and the strain rate sensitivity m was in the range of 0.8 to 1.0 for every composite. After the deformation, nanocrystalline structures with average grain sizes of about 30 nm were retained.

Cu-Mg-TiC nanocrystalline composite, mechanical alloying, nominal elongation, liquid phase, liquid-enhanced plasticity

Received: February 26, 2001
Accepted: April 26, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals



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