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Looking for credible articles/papers/research references for the below

Justice1327 said:
Yes, Zeglin, Siewart, Litz all provide their data. Army, Navy research papers are all good.
Spoomer is entertaining, but not credible for what I need.
Ackley was a designer/hunter and very opinionated...which is fine, just lacks credible data for the areas i am looking into...but he was obviously a leader and had great foresight on cartridge case design.
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I am not sure if Michael Courtney is still an LRH member but he used to be active here. He is an independent researcher with a PhD in Physics from MIT that did various studies and publications on that might lead you to what you are looking for. He is also a professor at the US Air Force Academy. He also partnered with Amy Courtney who has a Ph D in Biomechanics and taught at the West Point's Department of Physics and Nuclear Engineering. Do a search on their works and you might find something to satisfy your curiosity. Good luck!
 
FEENIX said:
I am not sure if Michael Courtney is still an LRH member but he used to be active here. He is an independent researcher with a PhD in Physics from MIT that did various studies and publications on that might lead you to what you are looking for. He is also a professor at the US Air Force Academy. He also partnered with Amy Courtney who has a Ph D in Biomechanics and taught at the West Point's Department of Physics and Nuclear Engineering. Do a search on their works and you might find something to satisfy your curiosity. Good luck!
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That is awesome and thanks. I am retired AF and consult for USTC, so I will try to make contact with him.
 
Justice1327 said:
That is awesome and thanks. I am retired AF and consult for USTC, so I will try to make contact with him.
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I, too, am a retired USAF (2007) but still work for DAF, and working for my second retirement ((maybe 2027). My son is a 2011 USAFA grad but I am not sure if he ever had Michael as one of his professors.
 
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Justice1327 said:
Yes, agree. that is why I am looking into a nitrided chamber and what it may or may not do. Obviously I am not the first, just looking for information on it and how chamber design/shape has changed and any proof that a particular change in design from past is quantifiably better.
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Nitriding will not change the SURFACE FINISH other than darkening the colour. I am an Engine Reconditioner and specialise in performance engines, mostly high powered V8 engines for drag racing and oval track Sprint cars.
We get our forged steel cranks nitrided even if done by the factory first, it changes only the colour to a greyish hue, journals are polished again afterwards, just to make them shiny again, as they dull off after treatment.
Hope this helps, the treatment only goes a few tenths passed the surface.

Cheers.
 
MagnumManiac said:
Nitriding will not change the SURFACE FINISH other than darkening the colour. I am an Engine Reconditioner and specialise in performance engines, mostly high powered V8 engines for drag racing and oval track Sprint cars.
We get our forged steel cranks nitrided even if done by the factory first, it changes only the colour to a greyish hue, journals are polished again afterwards, just to make them shiny again, as they dull off after treatment.
Hope this helps, the treatment only goes a few tenths passed the surface.

Cheers.
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Any experience nitriding barrels?
 
Justice1327 said:
Any experience nitriding barrels?
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I haven't nitrided any myself, but I owned a Kreiger that had cryo treatment and another that was nitrided, no difference could be seen between them and regular barrels, although the cryo barrel seemed to never get dirty, even after 100 shots or so, just dull to look down the bore and patches always came out clean in less than 10 passes.
Never saw any accuracy improvement.

Cheers.
 
Justice1327 said:
Yes, agree. that is why I am looking into a nitrided chamber and what it may or may not do. Obviously I am not the first, just looking for information on it and how chamber design/shape has changed and any proof that a particular change in design from past is quantifiably better.
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Niriding will increase compressive strength of just the surface of the chamber walls. Extremely hard and wear resistant.
It's done at a lower temperature than the parent material was aged or tempered to a hardness as a stainless vs carbon barrel would be. That way the base material retains its strength after nitride. The smoothness would have needed to be established prior to nitriding. Nitriding can be thin .000x or up to say .005 thick. Some build up happens to change dimensions so that needs to be accounted for. Not ideal to have build up on a firearm chamber so they are thin on nitride. Usually there is no finishing processes after nitriding.
Hope this helps the op.
 
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MagnumManiac said:
I haven't nitrided any myself, but I owned a Kreiger that had cryo treatment and another that was nitrided, no difference could be seen between them and regular barrels, although the cryo barrel seemed to never get dirty, even after 100 shots or so, just dull to look down the bore and patches always came out clean in less than 10 passes.
Never saw any accuracy improvement.

Cheers.
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Thank you. I was mostly just looking for extended barrel life.
 
Bob Wright said:
Niriding will increase compressive strength of just the surface of the chamber walls. Extremely hard and wear resistant.
It's done at a lower temperature than the parent material was aged or tempered to a hardness as a stainless vs carbon barrel would be. That way the base material retains its strength after nitride. The smoothness would have needed to be established prior to nitriding. Nitriding can be thin .000x or up to say .005 thick. Some build up happens to change dimensions so that needs to be accounted for. Not ideal to have build up on a firearm chamber so they are thin on nitride. Usually there is no finishing processes after nitriding.
Hope this helps the op.
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Yes, I've read similar things, but I gotta make sure that whoever does the nitro that it's not too thick
 
Justice1327 said:
Thank you. I was mostly just looking for extended barrel life.
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Seriously, the few micron depth of the surface hardening may or may not increase longevity, because heat is nitriding's worst enemy.
It does allow a bearings surface to last longer in 'normal' operation, but if something like a spun bearing occurs, it makes diddly squat bit of difference. The heat goes through the hardening in milliseconds.
Having used both nitriding and cryo, I did not see any evidence it improved upon barrel life other than the cleaning aspect, neither one fouled like hammer forged barrels.

Cheers.
 
1. It doesnt
2. It doesnt

Look at combustion like blowing up a balloon not like a gardon hose.
Chamber finish makes a big difference in pressure handling but not ballistics. I have tested this.
 

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