Kind: captions
Language: en
it's not widely known but for more than
200 years knights in shining armor and
guns coexisted on the battlefield
Knights were some of the first people to
take up Firearms their armor embodied a
revolution in metal making but how were
they made there are no surviving texts
from the time accurately describing how
they hardened armor but Jeff has come up
with a strategy after weeks of pounding
and shaping there's one final step that
trans forms good armor into great armor
that's
bulletproof hardening the metal if you
can work out how to harden steel you can
certainly double its strength which
means that it is then twice as resistant
to bullets as well as to other weapons
he's going to heat treat the armor in a
process known as the quench with the
heat treating you're causing a change in
the crystal structure of the metal
magnifying the unhardened steel reveals
many light areas these regions are low
in carbon so the iron atoms can slide
past each other making the armor too
soft Jeff will heat the steel so the
grid of iron atoms expands and carbon
can redistribute from high concentration
areas to low ones then he'll lock the
carbon into place by cooling the armor
quickly in oil this new structure is
harder but more brittle too heating the
piece again will soften the metal
slightly so it can withstand an impact
without cracking a crack could mean
disaster he listens to see how the metal
reacts you hear
that Jeff can't see any cracks in the
placard that protects the breastplate
but he won't know its strength until the
armor is
tested it's just a a dent just a little
bigger than my
even from Modern ballistics experts the
armor has performed Beyond
expectation who that bullet is
gone armor one bullet nothing