Hall-Petch equation

English

Etymology

Independently discovered by English scientists Eric O. Hall and Norman J. Petch, in 1951 and 1953 respectively.

Proper noun

the Hall-Petch equation

1. (materials science) A relationship between the yield point and grain size of a material given by the equation σ_y = σ₀ + k_y * d^-0.5, where σ_y is the yield stress, d is the average grain diameter, and σ₀ and k_y are constants specific to a particular material.