What is Hall-Petch Equation?

Fundamental of Physical Metallurgy Part 33

[@ajaikumar5329]

Sigma y denotes?

[@MetallurgicalEngineering]

σy is the yield strength

[@Nam_Aankhein]

What is the limiting value of d after which inverse hall pitch phenomenon is observed

[@MetallurgicalEngineering]

Thank you for your comment. Inverse Hall-Petch behaviour when grain size is reduced to around 10-15 nm, where the GB sliding dominates the plasticity and softens the materials. Kindly share our KZbin channel with your friends. Thank you.(Team Meta)

[@ryanelliott8913]

How do you calculate K?