Strain-rate effects in high-purity alumina
Document Type
Article
Publication Date
5-1995
Department
Department of Materials Science and Engineering
Abstract
Ultrahigh-strength alumina specimens made from disks produced by vacuum hot pressing high-purity alumina powders were subjected to uniaxial compressive loads at a range of strain rates. It was observed that the material exhibited a failure strength far superior to commercially available alumina. The failure strength was strongly strain-rate dependent and varied from 5.5 GPa at 10-4 s-1 to 8.3 GPa at 103 s-1. Microscopic studies on the fragments of the specimens deformed under uniaxial strain revealed extensive twinning and dislocation activity. Based on the experimental results and microscopic observations, the factors and mechanism responsible for the observed high compressive strength are discussed.
Publication Title
JOM
Recommended Citation
Staehler, J.,
Predebon, W.,
Pletka, B.,
&
Subhash, G.
(1995).
Strain-rate effects in high-purity alumina.
JOM,
47(5), 60-63.
http://doi.org/10.1007/BF03221180
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/4561