Sub-Grain Size and Hall-Petch Relation in Pure Copper Single Crystals |
| Journal |
Key Engineering Materials (Volumes 345 - 346) |
| Volume |
The Mechanical Behavior of Materials X |
| Edited by |
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim |
| Pages |
29-32 |
| DOI |
10.4028/www.scientific.net/KEM.345-346.29 |
| Online since |
August, 2007 |
| Authors |
Sei Miura,
Yoshito Nishimura,
Nagato Ono
|
| Keywords |
Copper (Cu), Dislocation, Etch Pit Observation, Plastic Deformation, Single Crystal, Subgrain Boundary |
| Abstract |
The effect of sub-grain on the yield stress of pure copper single crystals with the [253]
orientation was investigated by using the etch pit technique. The single crystal plates were
successfully prepared from the seed crystals, which were produced at the melting temperature of 1473
K by the Bridgeman method. The present investigation confirmed the Hall-Petch relation concerning
the effect of sub-grain boundaries on the macroscopic yielding of pure copper. The result derived
from the extrapolation of the relationship of critical resolved shear stress (CRSS) and the initial
dislocation density and sub-grain size is in good agreement with the evaluation in high purity copper
single crystals of low dislocation density. |
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