Self organising steel balls explain metal heat treatment

Get 2 months of Skillshare Premium for free at: Metals have a crystal structure. But they re not one big crystal, they re lots of small crystals called grains. The size of the grains affects the physical properties of the metal, like hardness, toughness, strength, mailability, ductility, plasticity. Heating a metal can change the size of the grains. This ball bearing model demonstrates annealing. Ductility is dependent on how far dislocations are able to travel in the metal which is dictated by grain size. Original ball bearings video here: Other metal heat treatment videos here: You can buy my books here: You can support me on Patreon here: just like these amazing people: Glenn Watson Joël van der Loo Matthew Cocke Mark Brouwer Deneb Image credits: First microscope grain image (1:11): Tugsataydin