Рет қаралды 20,940
Let's break stuff! I crushed a solder-free pure gold ring to show yall the strength of solid gold.
I want people to know that 24k gold is a good viable option for jewelry.
24k gold jewelry requires forging to work harden it to the point of usability.
I fused this gold ring, so it only contains 99.9% gold from a solid gold bar.
PLEASE NOTE: I say "tactility" a few times. I meant to say "tensility".
My mouth runs away from my brain easily.
SCIENCE TIME:
In forging jewelry, we move metal with a compressive force through the extent of its elastic deformation and into the region of plastic deformation.
Once we plastically deform the metal, it retains its new shape.
We want this new shape to be useful, beautiful, and strong!
Gold's grain structures are stressed during work hardening.
These stresses are internal, directional, and provide hardness and strength.
Heating stressed grains up (annealing) gives the grains enough internal energy (heat energy) to reform/remelt into new, unstressed grains.
If you keep whacking gold (or silver), the stress fractures become visually perceivable, until the whole thing fractures (maybe I'll make a video on that).
This failure point is somewhere past the point known as "ultimate tensile strength".
If you're nearing the failure point of your metal, but you're not finished with the shape, anneal your piece before continuing working.
Once you're nearing the shape you want, DON'T ANNEAL ANYMORE.
You want the strength and hardness that your work hardening has contributed.
The internal loading/stress that the metal is under will help resist external forces!
There's an art to knowing when to anneal.
TIMESTAMPS:
00:00 Intro and gabbing
00:50 failing to crush a work hardened gold ring
01:15 annealing the gold to soften it
02:20 easily crushing the gold after annealing
03:45 failing to crush the same ring after work hardening it again
04:38 gold and forging lecture
More reading:
en.wikipedia.org/wiki/Work_ha...
en.wikipedia.org/wiki/Anneali...)
en.wikipedia.org/wiki/Deforma...)
en.wikipedia.org/wiki/Plastic...)
en.wikipedia.org/wiki/Ultimat...
en.wikipedia.org/wiki/Strengt...
www.amazon.com/Theory-Practic...