Silver has a shear modulus .

PHYSICS · Multi-part · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Crystal structure, bonding and diffraction · Crystal structure, bonding and diffraction

Condensed Matter Physics, Ch Real crystals: vacancies, dislocations and the strength of metals

Problem

Silver has a shear modulus G=30 GPaG = 30\ \mathrm{GPa}. ((a)) Estimate its theoretical shear strength using τth≈G/2π\tau_{\rm th} \approx G/2\pi. ((b)) A pure silver single crystal begins to deform plastically at a critical resolved shear stress of about 0.6 MPa0.6\ \mathrm{MPa}. Find the ratio of the theoretical estimate to this measured value.

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