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Consolidation of Mechanically Alloyed Al-15at% Cr Powder Using Impact and Static Pressures

Yoritoshi Minamino 

Joining and Welding Research Institute, Osaka University, Osaka, Japan


Consolidation of mechanically alloyed Al-15at%Cr powder using impact
static high pressures
Y. Minamino 1 , S. Yamada 1 , T. Yamane 2 , K. Hisayuki 2 , M.
Kiritani 3 and M. Komatu 3
1 Department of Adaptive Machine Systems, Graduate school of
Engineering, Osaka University,
2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
2 Department of Mechanical Engineering, Hiroshima Institute of
Technology, 2-1-1 Miyake,
Saeki-ku, Hiroshima 731-5143, Japan
3 Academic Frontier Research Center for Ultra-high speed Plastic
Deformation, Hiroshima
of Technology, 2-1-1 Miyake, Saeki-ku, Hiroshima 731-5143, Japan
The powder of Al-15at%Cr amorphous with nanocrystalline Cr was
prepared from a
pure Al and Cr mixed powder by mechanical alloying using a high energy
ball mill, and it was consolidated by the static high pressure up to
2GPa and impact
high pressures. Improved compacts were obtained. However, they have
phases induced by static high pressures, or decomposition phases due
to local heat
generation by impact high pressures. Their Vickers hardness are about
5000 MPa
Vickers, which is quite high when compared with the hardness of 180
MPa Vickers for
commercial metal.
Keywords: static high pressure, dynamical high pressure, mechanical
alloying, Al-15at%Cr
alloy, amorphous, shear band, heat generation, decomposition, relative


Legal notice
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Presentation: oral at High Pressure School 1999 (3rd), by Yoritoshi Minamino
See On-line Journal of High Pressure School 1999 (3rd)

Submitted: 2003-02-16 17:33
Revised:   2009-06-08 12:55