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Proceedings Paper

Damage And Dynamic Hardness Of Ionic Crystals By Microparticle Impact
Author(s): M. M. Chaudhri; A. Stephens
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Paper Abstract

A high-speed framing camera (framing rates up to 1.65 x 106s-1) has been used to follow the damage in NaC1 and LiF crystals by the impact of spheres of soda-lime glass and tungsten of diameter 0.1 - lmm and velocity up to 300 ms-1. The damage takes place in two stages. During the loading, plastic flow occurs on {110} planes causing cracks on shear planes, and is followed by fast cleavage cracks on {100} planes containing the impact-axis. During the particle rebound the primary cleavage cracks stop propagating, but several cracks form on cleavage planes parallel to the impacted surface. The maximum strain rates in these experiments are ~105 s-1; this leads to a considerable in-crease in the hardness of these solids.

Paper Details

Date Published: 27 July 1979
PDF: 4 pages
Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957683
Show Author Affiliations
M. M. Chaudhri, Cavendish Laboratory (England)
A. Stephens, Cavendish Laboratory (England)

Published in SPIE Proceedings Vol. 0189:
13th Intl Congress on High Speed Photography and Photonics
Shin-Ichi Hyodo, Editor(s)

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