Ah, so it has been done. Thank you, Cliff.Cliff Stamp wrote:Damasteel :
"It is significant feature of the invention that at least two stainless steel materials having different chemical compositions are bonded together through hot isostatic compaction at a pressure exceeding 600 bar and a temperature exceeding 1000° C."
The full patent : https://www.google.ca/patents/US5815790 ... CB4Q6AEwAA" target="_blank
Note that in blending steels, either using PM or traditional forge welding, it isn't as simple as say taking S5, AEB-L and 10V and blending them to get something which has the toughness of S5, the apex stability of AEB-L and the wear resistance of 10V. It is likely what you would end up with is a steel which is a muddled bit of all of them because of the inability to harden it to optomize any aspect and the severe inhomogeneity of the steel.
In advance - please forgive me for my rusted science babbling...Cliff Stamp wrote:Note that in blending steels, either using PM or traditional forge welding, it isn't as simple as say taking S5, AEB-L and 10V and blending them to get something which has the toughness of S5, the apex stability of AEB-L and the wear resistance of 10V. It is likely what you would end up with is a steel which is a muddled bit of all of them because of the inability to harden it to optomize any aspect and the severe inhomogeneity of the steel.
Ha, you should use that as the tag line on your knives.bluntcut wrote: In doing ht tinkering/research, my general objective is:
* obtain global minima energy potential configuration in large matrix(simulation per say) consist of structures weave together mostly by lattice and covalend bond (for non-steel-matrix).
Somehow my mind closed shut - a few years back - on friction forge, after I spent a few hrs in estimating how heat propagation/radiate into blade from a small friction disc (basically a dry mill head). One side of the bevel will has diff transformation than the other due to heat gradient and material displacement.Cliff Stamp wrote:As an aside, interestingly enough, I was able to locate active research in extreme quenching of steels and the effects on martensite formation, including martensite formation well above the Ms point. The rates of quenching are orders above brine in terms of temperature gradients and come into play in welding large parts where the heat sink potential is essentially infinite compared to the media being cooled. I am still wading through some of the references now, but in contrary to popular web-belief, ultra-high speed quenching is researched in martensitic formation
Hey Scotty beam me up... so I can use the conherent focusing inductor with dual-opposing ultra-sonic ceramic composite heads to epsilon nucleatized then 10 above Kelvin flash my bladeCliff Stamp wrote:It is a combination of very high soak+minimal time, mechanical deformation and fast soak which produces an extremely fine aus-grain, very fine distribution of carbides and extremely high working hardness. I have one of the blades on a pass around.
Liquidmetal is an amorphous metal, or bulk metallic glass material. Typically, the Liquidmetal concoctions are a mix of zirconium, copper, aluminum, nickel with some large atom like Barium. Initial mixes were not amenable to grinding or heat really in general and would have to be cast. More recent mixes have been reported to have better machining capabilities, but I have yet to see that in the avenues of amorphous metal that I work in. These are typically melts that are quickly cooled. Pseudo-ceramic sintered pucks of the desired metallic composition are typically sintered under argon and sold for use in semiconductor industrial processes like sputtering.JD Spydo wrote: About 8 years ago "BLADE" magazine did a huge article on a metallic epoxy type material call "LIQUIDMETAL" >> In the article they listed a lot of advantages this knife material had going for it.
I haven't done anything with steels of comparable hardness in the lab, so it is hard for me to comment on macroscale toughness.Bill1170 wrote:SolidState, what is the work of fracture like on the amorphous alloys you've worked with? How does the toughness compare with simple steels at comparable hardness? Would there be anything resembling a dislocation mechanism (in practical effect) in a metallic glass?
I have used the original liquid metal, it isn't overly difficult to sharpen though originally there were some complaints about it. Similar to the cobalt based alloys, or things like SM-100 or even beta-ti, they don't react exactly the same to abrasives as steel and thus you have to adjust how you are sharpening. Often it is a case of not being as dependent on burr formation, or dealing with excessive tenancies to load (titanium is very annoying in that respect).SolidState wrote:I would assume that makes stone grinding an edge on the stuff pretty darn difficult.
No, it was brittle fracture :SolidState wrote:
Did you see a lot of plastic deformation out of thin cross sections?
Cliff I assume you're just kidding about LAWNMOWER BLADES being made of Liquidmetal?? Which makes me wonder what primary use they had for the material to begin with. From what I can remember of that article in BLADE magazine they really didn't say what it's creators made it for primarily.Cliff Stamp wrote:What would be nice to see in general for anyone making that kind of claim would be to see some actual properties related to the actual use. But of course I am looking at it from the point of view of understanding it not from the perspective of selling it. In many cases a lot of these move/sell as collectibles and a liquid metal blade sounds like a pretty cool thing, especially compared to something which is basically used to make lawnmower blades, not very interesting at all.
I guess I didn't write that very clear, when I wrote this :JD Spydo wrote: Cliff I assume you're just kidding about LAWNMOWER BLADES being made of Liquidmetal??
Cermets are basically composites of steel and ceramics which attempt to give ceramics some of the toughness of steel, they are usually much more ceramic than steel. There are entire classes of such super alloys which use various binders (cobalt is another) to try to balance the necessary toughness with the extreme wear resistance, hardness and heat resistance of carbide. I am not sure in general any of these types of materials would actually be superior to steel for a knife assuming you wanted one which was designed to cut well. They however can work very well in particular applications.Also I remember BOKER using a material called "CERMET" for knife blades.