microstrain

Meaning

Noun

• A strain expressed in terms of parts per million
• The root mean square of the variations in the lattice parameters across the individual crystallites, usually across microscopic distances, <ϵ²>^1/2. By definition, it cannot be negative. In contrast, macrostrain refers to the overall change in the lattice parameters caused by a composition change or temperature change or pressure change.

Origin

• micro- + strain