Hall-Petch equation
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English
Etymology
Independently discovered by English scientists Eric O. Hall and Norman J. Petch, in 1951 and 1953 respectively.
Proper noun
- (materials science) A relationship between the yield point and grain size of a material given by the equation σy = σ0 + ky * d-0.5, where σy is the yield stress, d is the average grain diameter, and σ0 and ky are constants specific to a particular material.