# Experimentally, it has been observed for single crystals of a number of metals that the critical resolved shear stress Ïcrss is a function of the dislocation density ÏD as here Ï0 and A are constants. For copper, the critical resolved shear stress is 2.10 MPa (305 psi) at a dislocation density of 105 mm-2. If it is known that the

Experimentally, it has been observed for single crystals of a number of metals that the critical resolved shear stress Ï„crss is a function of the dislocation density ÏD as

here Ï„0 and A are constants. For copper, the critical resolved shear stress is 2.10 MPa (305 psi) at a dislocation density of 105 mm-2. If it is known that the value of A for copper is 6.35 Ã— 10-3 MPa-mm (0.92 psi-mm), compute the Ï„crss at a dislocation density of 107 mm-2.

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**Related Book For**

## Materials Science and Engineering An Introduction

8th edition

**Authors:** William D. Callister Jr., David G. Rethwisch

**ISBN:** 978-0470419977