Myths About Damascus - Edge Retention, Sharpness, and History

I'd be interested to know how that AEB-L/154CM composite performed in a Charpy test. While it didn't out perform 154CM in the Catra, it did out perform AEB-L. Would the Charpy look approximately the same, ie splitting the difference? Just curious.
 
kuraki said:
I'd be interested to know how that AEB-L/154CM composite performed in a Charpy test. While it didn't out perform 154CM in the Catra, it did out perform AEB-L. Would the Charpy look approximately the same, ie splitting the difference? Just curious.
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There are potential complications with toughness testing including the potential introduction of impurities, in certain scenarios (layer count, orientation, etc.) there can be an increase in toughness due to energy required for delamination, and there is somewhat of a refinement of the carbide size of 154CM. Also if you remember my microchipping article the crack initiation may be reduced by the 154CM carbides potentially making the AEB-L less effective at increasing toughness (especially with unnotched). In summary there are a lot of factors and the specific variables of each test are important. I know that in tensile testing of a 420/302 stainless steel laminate that it behaved as a composite in terms of strength and ductility.
 
With that said, it's possible AEB-L/154CM composite is superior to AEB-L in edge retention and toughness?
 
Informative as always! It’s great that you are putting these articles together. I’ll be using them as references when newer makers are asking questions.
 
When i saw the two stacks in the beginning, i was expecting dueling pistols. Then he combined the rods into a ribbon, and so i was hoping for a .50 carbine given the lengths. And then i realized it was never going to get drawn out very long, so i was expecting a .50 hand cannon. And then ... toy cannon.
 
Thanks Larrin. Your article is exactly what I have been posting for years.

I don't expect the truth to stop the hype and legends, though. It is hard to stop a myth because those who believe it usually don't want it to be anything but true ... so they ignore any other information. I got death threats (really!) when I wrote a letter claiming a beloved knifemaker was giving wrong info about HT based on his assumption of metallurgy. I recently met a newer smith who boasted that he went out to that person's school and had learned his "secrets" of forging and HT. I just let it go ... because he really didn't want to hear anything else.
 
Thank you so much for your time and effort putting this info together. This is the first objective testing I've seen done. Pattern-welded is pretty, admittedly and I love the patterns but I'm personally tired of having people telling me vague, historical rumors about cutting a floating silk scarf and the like without a shred of evidence to back them up.
 
Another informative writup separating fact from fiction.
Some will believe, others will continue drinking the koolaid.
Others will still spin it to meet their own ends.
Thank you for doing the hard work.
 
Until I see a large sample test on machine gun barrels and decapitating camels I'm pretty sceptical that this was a accurate test. Infact the true test should be a camel wearing a silk scarf and carrying a machine gun. o_O
 
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