Specific Features of Strengthening Phenomena in NaCl:Eu^{2+} Crystals

• Authors: M. Suszyńska
• Languages of publication: EN

Abstracts

EN

Mechanical strength of europium doped NaCl crystals was studied as a function of both the dopant concentration (c_{2+}) and the kind of obstacles effective in hindering the motion of dislocations. It has been found that the yield strength (σ_{0}) of solution treated samples is determined by Snoek reorientation of both isolated dipoles and linear dimers within the stress fields of moving dislocations. The deviation of the σ_{0} (c_{2+}) plot from linearity is probably due to the presence of quadripoles cutted through the moving dislocations. Also for as- received specimens two precipitation strengthening mechanisms are postulated; these are the Kelly-Nicholson cutting and the Orowan looping, respectively.

Keywords

EN

77.40.+i

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 79
• Issue: 4
• Pages: 493-500

Dates

published

1991-04

received

1990-05-04

(unknown)

1990-08-01

Contributors

author

M. Suszyńska

• W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, pl. Katedralny 1, 50-950 Wrocław, Poland