ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Explosive compaction of Ni and NiAl powders was utilized for the processing of Ni/NiAl metal-matrix composites containing up to 57 vol% NiAl particulate. The microstructure, the Vickers microhardness and the Ni/NiAl interfacial bonding strength were studied. The resulting microstructure had a very low volume fraction of porosity (∼ 1 vol%) except for the melting zone formed in the upper portion of a cylindrical specimen. NiAl particles underwent welding during explosive compaction; this was particularly pronounced at the highest volume fractions of NiAl. The lowest microhardness of the Ni matrix was observed in the central portion of a cylindrical specimen. Other parts of the matrix were heavily cold-worked, indicating that a recrystallization had occurred in the centre. NiAl particles were also highly cold-worked regardless of their volume fraction in the composite. The Ni/NiAl interfacial bond strength, measured by the indentation debonding technique, was highest in a composite containing 57 vol% of NiAl particulate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00354563
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