Dynamic compression behaviour of tungsten powders consolidated by plasma pressure compaction
Document Type
Article
Publication Date
1-1-1999
Abstract
It has been generally believed that the ductility of tungsten can be increased by decreasing grain size to ultrafine levels (approximately 100 nm). Pure ultrafine grain tungsten powders of various average particle sizes (2.0, 0.7, and 0.16 μm) were consolidated using the rapid consolidation technique, plasma pressure compaction (P2C), to minimize grain growth. Preliminary results indicate that tungsten powders can be consolidated to high density without abnormal grain growth at 2000 °C and 50 MPa with less than 3 min of isothermal holding time in the P2C process. The densities of consolidated specimens were measured using Archimedes' method, and the microstructure was analyzed using SEM. The mechanical behaviour of the consolidated specimens was investigated using the compression Kolsky bar. Dynamic compression properties were examined to determine the effect of grain size, grain structure, and density on yield stress at various strain rates.
Publication Title
Powder Metallurgy
Recommended Citation
Yoo, S.,
Sudarshan, T.,
Sethuram, K.,
Subhash, G.,
&
Dowding, R.
(1999).
Dynamic compression behaviour of tungsten powders consolidated by plasma pressure compaction.
Powder Metallurgy,
42(2), 181-182.
http://doi.org/10.1179/003258999665549
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/12967