Imagine killing someone with this knife, and they run a mass spec on the fragments and dust left in the wounds and then the technician just looks at the reading and mouths "WTF" because some florida man made a knife with 19 elements
Fun fact, alloying a lot of different alloys increase the number of dislocations in the crystal structure which increases its hardness but at the cost of making the alloy much more brittle, annealing can help to reduce the brittleness.
@@nutmeg9005 Annealing is heating the metal up to the point that the atoms in it can move around pretty freely and then letting it cool down slowly. This lets the atoms move around to where they are more "comfortable", as it were, in the lattice structure of the metal, which they don't get a chance to do if you quench it/cool it down quickly. The dislocations that ComndrChf referred to are places where the atoms don't connect up to one another, due to an atom (or bunch of atoms) being next to an atom (or bunch of atoms) that's already got its connections filled up. All these breaks in the crystal lattice make it very easy to break. Letting it cool slowly gives them time to move around to find a place that they can link up, improving the ability for the whole structure to hold together under stress.
Adding to the dislocation part : we know the grains were small because of the quench(idk if water or oil would've been nest here tbh), dislocations move through the metal from one atom to the other. When they meet a grain joint(where the structure changes) the dislocations get stuck hardening the metal. Its also possible that the difference in size of the atoms and/or new compounds acted as obstacles. The annealing would be useless and would most likely fracture the alloy(if the mix isn't homogenous) with the stress being released at different moment from the kinetic energy gain. A diagram of that alloy would be insane, three main components make it hard to read already xD. Also, english is a second language, my scientific jargon is not the best and i know it.
Hey, 29 years casting here. You need a sprue, on the back, towards the tip of your knife create an L shape with a straw, so you have two holes in the the top of the mold. This let's the trapped air escape to avoid air pockets. Also make the mold deeper than the knife by an extra 30% that way you have space to create a reservoir cone that you pour into to avoid lost metal and if possible, preheat the mold near to the pouring temperature to keep the flow going better, then quench when it's still hot to align the crystals in the metal, anneal gently to stress relieve, then dip in a used motor oil, lots of crushed charcoal and petrol and carbon dust and burn the oil off, the petrol will make it burn rapidly, surface hardening, then quench in cold oil, again plenty of carbon like crushed charcoal, you don't have to do that but it gives you a very tough surface that's whether resistant and the core is fully stress relieved so it's not fragile.
Hey Kevin, I’m a high school student who just learned chemistry and the main reason I think your alloy may have been brittle was because you put in metaloids such as Boron, Germanium, and Silicon which are basically transition elements from the metals to gases. I think if you try this again without the metalloids this time it may work a lot better. The metalloid elements you want to avoid putting in are Boron, Silicon, Germanium, Arsenic, Selenium, Tellurium, and Astatine. I love your vids man keep up the good work!!!
After having found this channel, I'm beginning to feel like a kid again, with actual inspiration to keep me going forward right when I thought I was running out of steam. Thank you.
Gold isn't even that expensive, relatively speaking. Osmium is actually way more expensive, it's actually one of the most expensive elements that are non-radioactive and easiest to get but again, relatively speaking, because osmium is quite rare.
I think a big part why the metal was so brittle is the way you quenched it. Normally, blacksmiths have a process they follow so that the metal doesn’t become weak
I'm studying materials engineering, have a class called "metals and alloys" Let me just say I would want to have the phase diagram of that monstrosity.
Hey! I'm studying Metallurgical engineering (mostly metals)! Just letting ya know, it would be impossible to have a phase diagram of that many components. As it is the most components we can do and have a full phase diagram is 3 (Ternary phase diagram with temperature on the z-axis. Good luck with materials engineering!
@@y.w.6243 Yeah, I feel like a little more research about the structures of each metal would have gone a looonng way. Plus, he added a ton of Boron which embrittles the metal.
thought you material guys might enjoy this, but at my workplace we get to machine this alloy called "toughmet" its insane stuff, copper nickle tin alloy
I have always wondered what happens if several diffrent metal element got mixed and here is the answer. That was one of my childhood fantasy. tnx dude.
i mean, not because i don't like the language, in the matter of fact, i do and i'd love to learn swedish... but seriously bro, is it really that boring to be in sweden?
0:44 "it cost $150... meh... let's put it in the furnace." Yep that's Kevin. PS awesome video........as always Edit:a 100 likes...wow never got this many THanks people
Silicon and Boron on their own don't guarantee brittleness necessarily. Me real explanation is much longer than a youtube comment (I actually do quite a bit of work with high entropy alloys). The quick and simple explanation for this is, throwing all this together with no rhyme or reason is guaranteed to formed incoherent intermetallic compounds which, unless done in a purposeful and controlled way, pretty much guarantees your end product will be useless junk. This isn't science. This is uncoordinated flailing for views. 10 minutes on google would've predicted this result.
@@koolaidman007 since you're a metallurgist I just wanted to ask a question: Is it true that pouring molten metal (more specificaly aluminum) into water is extremely dangerous and that the only way thebackyardscientist is still alive today after his precedent videos about molten aluminum is due to the poor conditions he melted the metal in, preventing it from reacting with water thanks to an oxyde layer ?
Thank you for the periodic table color coded with red=dead and flammable stuff. Will come in handy as I am smart enough and handy enough to be curious and experiment but not smart enough to not do something dangerous
I don't think there are any elements left to discover. Maybe it could still be possible with a particle accelerator, but the chance of it happening would be super rare. We've already gone up to the atomic number 118, and anything above that is very unstable and will decay very rapidly into other elements, probably within nanoseconds. Anyway, you definitely can't make a new element by combining existing elements like this; all you get is an alloy.
@Duner250R you stoopid foc those are our nukes not just the governments if you want to use it Issa okay just put it back where you found it when you’re done with it
Looks like you ended up with a heterogeneous metal that was loosely bound together. The little molten balls likely indicate that some of the metal didn't mix at all.
Backyard scientist does an experiment that could lead to a groundbreaking new material that stronger that steel Also backyard scientist takes said material and pours it into grapes
"groundbreaking new material" That’s not how metallurgy works. I pretty much expected it to become a brittle mess. Real superalloys use one base metal (nickel is quite popular for this) and some carefully chosen additives.
@@among-us-99999 I don't know too much about metallurgy, but what about titanium? It's just an element on the periodic table, but our shop uses it rather often for sturdy projects. Stronger and lighter than steel (and stainless steel). Can it be 'superalloyed'?
@@awashburn6944 Good to know! I've always wondered why some of our contracts require titanium. The more you know I guess. Whats the price difference between titanium and nickel-based superalloys?
a friend of mine has a large kiln in his garage. there is no way were wheeling that thing outside to melt stuff. plus schools use them without dragging them outside too.
the demo for kiwico is a lot more interesting than shown; it ends up being a very good demonstration for the concept of "chaos theory," a concept in theoretical physics. basically, we can determine any outcome from the starting values, but since the starting values cant be known to a satisfying degree of certainty, there will always be major variation
It looks like he made an expensive version of pot metal. pot metal tends to be brittle and crack over time because it's an unstable mixture of several low melting point metals.
I would mix elements based on their melting point, aka, add the highest temperature elements first, then work your way to the lowest. They might bond better. Also adding chemicals into the mix will help change properties of the metal.
