veritas LAJ A2 or O1 blades?

[Jacob]

I assume there will always be "some radius to an edge" until someone discovers a sharp molecule.

Tells you aboutmolecule shapes here. They aren't round!

Precisely, except that the steel grains are made up of larger lumps than atoms and molecules, so it is grain size that dictates the smallest size at the edge. O1 reputedly has smaller grains therefore sharper edge.

"Precisely" isn't the word. "Vaguely" would be better. The sort of roundness you get with a blunt edge is nothing much like the vague indeterminate roundness you may or may not get with particles exposed on a sharp edge

Hock A2 cryo has smaller grains than regular A2 and this can be noticed when sharpening, the wire edge releases a little easier and the result is sharper. It feels less 'plastic' on the stone. If my noticing this gives me a problem, then I'm sorry. I guess there is a level of detail some people notice and others don't see.

Mike.

Does it give you a problem? What do you mean? Can you see molecules with your bare eyes?

 

[G S Haydon]

"Hock A2 cryo has smaller grains than regular A2 and this can be noticed when sharpening, the wire edge releases a little easier and the result is sharper. It feels less 'plastic' on the stone. If my noticing this gives me a problem, then I'm sorry. I guess there is a level of detail some people notice and others don't see.


Nice write up, I can imagine exactly what you are trying to say with that. I find it easier to understand this than going to deep on atomic size :lol:

 

[woodbrains]

Hello,

If we take a longitudinal section through a sharp plane iron, with all the scratches, lumps, bumps inclusions it looks a bit rough. But a section has no thickness, the blade has width made up of many of these sections. Let us assume that the section is 1 thou thick. Take more sections at intervals through the blade, a 2 inch iron will have 2000 such sections. I have represented just 4 . Anyone think the edge of a plane looks radiused now? A section of microscopy can only tell us so much, a plane iron has width.

Mike.

 

[Jacob]

Very interesting!
Did you draw them yourself? :lol:
Maybe a coincidence but I think B Beaches drawing of wear on blades is also "imaginative".

Seriously though - you might get a better idea about how things are by actually looking at them, rather than just imagining them.

 

[woodbrains]

Very interesting!
Did you draw them yourself? :lol:
Maybe a coincidence but I think B Beaches drawing of wear on blades is also "imaginative".

Seriously though - you might get a better idea about how things are by actually looking at them, rather than just imagining them.

No, I cut them from thin card with scissors.

Precisely how could sequential sections through a blade be any different? Like I have said, microscopy will only show a very limited picture. At such a high mag, you might only see 1 thou section. At some point you have to extrapolate.

Mike.

 

[Jacob]

...
Precisely how could sequential sections through a blade be any different? .....

Not cut out of card with scissors for starters. Top marks for effort though - a pity you get the answers all wrong!
I bet a good answer is out there somewhere. Google away and then you won't have to extrapolate (it makes you go blind).

 

[Racers]

Hi Woodbrains

Leave it, he is just trying to wind you up, don't think you can reason with him.

There are only two ways, Jacobs way and the wrong way.


Pete

 

[G S Haydon]

This sprang to mind, I think you will find there are three ways. http://www.youtube.com/watch?v=Q5cEAhjcv54

 

[woodbrains]

:lol:

Mike.

 

[lanemaux]

I was going to suggest a reading of Edgar Allan Poe 'Eureka' , But Haydons way was indeed faster.