Particle hardening in manganese-doped sodium chloride single crystals

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Abstract
The effects of temperature and strain rate changes on the yield stress have been used to analyse the strengthening produced in NaCl single crystals containing 675 mole p.p.m. Mn++. The temperature dependence of the yield stress observed at low temperatures can be interpreted satisfactorily in terms of the thermally activated cutting of particles; the particles are considered to be trimers. The athermal yield stress can be explained in terms of contributions from precipitation hardening by the Orowan mechanism and from coherency stresses due to trimers.