Tensile Deformation of Si Single Crystals at High Temperatures
Czochralski silicon single crystals were deformed in tensile tests along the direction at between 1173 K and 1373. Yield point phenomenon were observed in the specimens deformed at below 1273 K while continues yield was observed in the specimens deformed at above 1323 K. It is due to the effect of d...
Saved in:
Published in | Materials science forum Vol. 1016; pp. 1443 - 1447 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Trans Tech Publications Ltd
05.01.2021
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Czochralski silicon single crystals were deformed in tensile tests along the direction at between 1173 K and 1373. Yield point phenomenon were observed in the specimens deformed at below 1273 K while continues yield was observed in the specimens deformed at above 1323 K. It is due to the effect of dislocation starvation in the used crystals. Work-hardening rates in stage II were consistent with those reported in fcc crystals such as copper. The onset of stage II was found to be active before the Schmid factor of the second slip system becomes larger than that of the primary slip system. Electron backscattered diffraction images indicated clear kink bands near grips and in the parallel portion. The kink bands were formed at the middle of stage I, which suggest that the formation of kink bands is a trigger of stage II. |
---|---|
Bibliography: | Selected, peer-reviewed papers from the International Conference on Processing & Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications (THERMEC 2021), May 10-14, 2021, Vienna, Austria |
ISSN: | 0255-5476 1662-9752 1662-9752 |
DOI: | 10.4028/www.scientific.net/MSF.1016.1443 |