solids

Simulation of Dislocations in Metals - Part 2 of 2

As the raft of bubbles is stressed with the slider, dislocations move into and out of the grains and their boundaries.

Liquid ethanol is poured into a saturated calcium acetate solution and a solid gel is formed. The gel burns like canned heat (Sterno™).

When the beta form of mercury(II) iodide cools to below the transition temperature of 126°C, it returns to the red/orange alpha form.

An animation illustrates how peeling occurs between layers where bonding is weak in molybdenum disulfide.

A metal bobby pin is heated until red hot, then allowed to cool slowly; this process is called annealing. The annealed bobby pin is very flexible.

An atomic-level simulation shows what happens to the metal bobby pin during the annealing process.

The tempering process, which involves heating a hardened bobby pin then cooling slowly, transforms the brittle metal into springy metal.

An atomic-level simulation shows what happens to the metal bobby pin during the hardening process.

An annealed bobby pin is heated, then cooled quickly; this process is called hardening. The hardened bobby pin is brittle.

An atomic-level simulation shows what happens to the metal bobby pin during the tempering process.