strengthening

1 free lesson tagged strengthening across Science. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.

Science

intermediate

Dislocations: Why Metals Bend and Ceramics Shatter

A dislocation is a line of atomic misfit that lets a crystal slip a few bonds at a time, and its mobility decides whether a material bends or breaks. This lesson explains how it moves, why some crystal structures permit it and others do not, and the four standard ways engineers obstruct it to buy strength at the price of ductility.

10 steps·~15 min

Dislocations: Why Metals Bend and Ceramics Shatter

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