okay today I'm going to be crushing
nitinol or memory wire so memory metal
is called nitinol because it's a alloy
of nickel and titanium so what's cool
about it is that you can twist it in any
shape that you want twist it all up and
if you just stick it in warm water full
shoot straight back straight and does it
pretty forcefully to just crumble it up
and stick it in this warm water is going
to just pop out straight ready hospital
so this memory metal it's used in heat
engines motorless motion like robotics
it's even used in orthodontic so like in
your braces this is the type of wire
that used so normal wire like steel or
something when you bend it it causes the
cubic structure all of the planes of
atoms to slip past each other and it
doesn't matter whether you stick in hot
water or not doesn't do anything but
this nickel titanium alloy is really
cool because under moderate bending like
this
the planes don't actually slip past each
other they just get stretched out when
you give them enough energy they just
pop right back okay cool so what I want
to do today is to see if i crush it with
enough pressure that will cause the
atomic planes to slip past each other
and it won't pop back into shape
ok let's flatten out this memory metal
and see if it regains its shape
afterwards okay memory metal crushed by
a hydraulic press three two one
be pretty flat now
okay so that looks pretty crinkly
there's a lot of holes in it now
ok so it got pretty flat and even made
some really good wrinkles in it you
can't get with just bending it with your
fingers so I want to see if those also
pop back straight when I put it back in
water
ok I'm going to drop this in the water
see what happens
hey really do anything huh at least go
straight i thought maybe the crinkles
when come out i'm going to heat up my
water a little more okay let's put it
back in the water see what happens
oh it's been whining but not a lot haha
that's surprising
so i heated the water up a lot almost
boiling didn't really get back so that
means in these parts where it's not
straightening it means that the atomic
planes slip past each other and now it's
truly deformed I wonder now straighten
it back out if it work will curl back
together
huh look at that that's so cool that's
so cool
so normally with night all if you heat
it up you can get it to form a new shape
so you can choose what shape you want to
be in when you heat it up but it looks
like also if you apply a lot of pressure
to it you can make it 4-2 shape so
notice how before it was straight and
wanted to be straight when I hated it up
but now since I crushed it and made it
curly and when I put it in the hot water
now it goes back curly that's so cool
so that's just from pressure not from
heat so the pressure caused the plane to
slip to I did not expect that that's
really cool and thanks for watching
another episode of hydraulic press
action i hope you enjoyed this video
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next time