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Why Doc doesn't use the term annealed with cartridge cases

DocCarbon said:
The effects of annealing at temperatures below which recrystalliza-
tion takes place may also be detected in the stress-strain curve. If a
specimen of brass is elongated by applying a load in tension, the elon-
gation is characterized by a rapidly and continually rising stress-strain
curve. If the load is removed and immediately reapplied, the second
application of stress rises to and continues to rise beyond the point of
interruption of the first cycle of stress; however, if the specimen is
annealed at a temperature below the recrystallization temperature,
appreciable yielding begins at a low value. Thus, a portion of the
initial strain hardening has been lost at the temperature and time of
anneal, and yet no recrystallization has taken place. The effects of
recovery are also detected in decreasing spring back under the in-
fluence of both time and temperature. The phenomenon of "season
cracking" in brass is mitigated by a low temperature recovery anneal,
and this treatment is regularly applied in industry to prevent this phe-
nomenon in cartridge brass. The magnitude of macro stresses is con-
siderably decreased, as evidenced by the partial return of elastic
properties to a condition intermediate between the cold-worked con-
dition and the fully annealed condition and the decreased tendency to
crack with further working. A condition refered to as malleability or ductility .
Complete stress relief is not attained by recovery, but is attained
by recrystallization. The mechanism of the phenomenon of recovery is
not understood, and probably will not be understood until the proc-
esses involved in plastic deformation are better defined. Recovery un-
doubtedly affects the elastic properties through the partial elimination
of internal stresses. The partial elimination of internal stresses also
decreases the internal friction, the electrical resistance and the velocity
of solution in acids, but has little effect on the strength and ductility
properties. The resolution of the alpha doublet in X-ray reflections is
regained, at least in part, during recovery anneals at temperatures
below recrystallization.
The perfection of atom disposition on a space lattice is grossly
distorted during plastic deformation; the atomic planes become twisted
and distorted, and the atoms no longer occupy precision positions
on a space lattice but are distorted to positions less symmetrically
disposed. This distortion results in an increase in the internal energy
of the metal, and a somewhat localized distribution of the energy.
The partial stress removal during recovery is probably associated with
a partial rearrangement of the space lattice, straightening of slip
planes, and return of atoms to positions more closely approximating
the unstrained space lattice. These processes are brought about by the
influence of heat, which permits a greater thermal vibration of the
atoms with resultant diffusion or movement of atoms to satisfy par-
tially the trend toward returning to the stable condition. The influence
of heat, however, is not great enough to permit a complete rearrange-
ment of the atoms on the space lattice, and the complete relief of stress
is not obtained.
Click to expand...
I apologize, my attention span is not long enough.
 
Dgd6mm said:
I apologize, my attention span is not long enough.
Click to expand...
This is the only part you need

“The perfection of atom disposition on a space lattice is grossly
distorted during plastic deformation; the atomic planes become twisted
and distorted, and the atoms no longer occupy precision positions
on a space lattice but are distorted to positions less symmetrically
disposed.”
 
JPB4BAMA said:
This whole string just brought a smile to my old face. I won’t directly comment on what terminology is actually correct as that is irrelevant within confines of the audience who may actually participate in the subject activity.

But out of a nagging sense of curiosity I am interested to know who else here, besides myself is actually a Metallurgist by degree?
Click to expand...
As a degreed metallurgist, what are your thoughts on post #56?
 
DocCarbon said:
The effects of annealing at temperatures below which recrystalliza-
tion takes place may also be detected in the stress-strain curve. If a
specimen of brass is elongated by applying a load in tension, the elon-
gation is characterized by a rapidly and continually rising stress-strain
curve. If the load is removed and immediately reapplied, the second
application of stress rises to and continues to rise beyond the point of
interruption of the first cycle of stress; however, if the specimen is
annealed at a temperature below the recrystallization temperature,
appreciable yielding begins at a low value. Thus, a portion of the
initial strain hardening has been lost at the temperature and time of
anneal, and yet no recrystallization has taken place. The effects of
recovery are also detected in decreasing spring back under the in-
fluence of both time and temperature. The phenomenon of "season
cracking" in brass is mitigated by a low temperature recovery anneal,
and this treatment is regularly applied in industry to prevent this phe-
nomenon in cartridge brass. The magnitude of macro stresses is con-
siderably decreased, as evidenced by the partial return of elastic
properties to a condition intermediate between the cold-worked con-
dition and the fully annealed condition and the decreased tendency to
crack with further working. A condition refered to as malleability or ductility .
Complete stress relief is not attained by recovery, but is attained
by recrystallization. The mechanism of the phenomenon of recovery is
not understood, and probably will not be understood until the proc-
esses involved in plastic deformation are better defined. Recovery un-
doubtedly affects the elastic properties through the partial elimination
of internal stresses. The partial elimination of internal stresses also
decreases the internal friction, the electrical resistance and the velocity
of solution in acids, but has little effect on the strength and ductility
properties. The resolution of the alpha doublet in X-ray reflections is
regained, at least in part, during recovery anneals at temperatures
below recrystallization.
The perfection of atom disposition on a space lattice is grossly
distorted during plastic deformation; the atomic planes become twisted
and distorted, and the atoms no longer occupy precision positions
on a space lattice but are distorted to positions less symmetrically
disposed. This distortion results in an increase in the internal energy
of the metal, and a somewhat localized distribution of the energy.
The partial stress removal during recovery is probably associated with
a partial rearrangement of the space lattice, straightening of slip
planes, and return of atoms to positions more closely approximating
the unstrained space lattice. These processes are brought about by the
influence of heat, which permits a greater thermal vibration of the
atoms with resultant diffusion or movement of atoms to satisfy par-
tially the trend toward returning to the stable condition. The influence
of heat, however, is not great enough to permit a complete rearrange-
ment of the atoms on the space lattice, and the complete relief of stress
is not obtained.
Click to expand...
I've never done this on this forum, but I want to declare BS. Not that every word of this post isn't in some engineering textbook, but Jesus H., it is way overboard here. Boss, if I'm out of line, feel free to delete my post.
 
I don’t find any value in annealing data based on 30 or 15 minute hold times. We anneal for seconds, not minutes. Which means we need significantly higher temperatures to have any meaningful recrystalization. 1050-1100F or more.
 
DocCarbon said:
The effects of annealing at temperatures below which recrystalliza-
tion takes place may also be detected in the stress-strain curve. If a
specimen of brass is elongated by applying a load in tension, the elon-
gation is characterized by a rapidly and continually rising stress-strain
curve. If the load is removed and immediately reapplied, the second
application of stress rises to and continues to rise beyond the point of
interruption of the first cycle of stress; however, if the specimen is
annealed at a temperature below the recrystallization temperature,
appreciable yielding begins at a low value. Thus, a portion of the
initial strain hardening has been lost at the temperature and time of
anneal, and yet no recrystallization has taken place. The effects of
recovery are also detected in decreasing spring back under the in-
fluence of both time and temperature. The phenomenon of "season
cracking" in brass is mitigated by a low temperature recovery anneal,
and this treatment is regularly applied in industry to prevent this phe-
nomenon in cartridge brass. The magnitude of macro stresses is con-
siderably decreased, as evidenced by the partial return of elastic
properties to a condition intermediate between the cold-worked con-
dition and the fully annealed condition and the decreased tendency to
crack with further working. A condition refered to as malleability or ductility .
Complete stress relief is not attained by recovery, but is attained
by recrystallization. The mechanism of the phenomenon of recovery is
not understood, and probably will not be understood until the proc-
esses involved in plastic deformation are better defined. Recovery un-
doubtedly affects the elastic properties through the partial elimination
of internal stresses. The partial elimination of internal stresses also
decreases the internal friction, the electrical resistance and the velocity
of solution in acids, but has little effect on the strength and ductility
properties. The resolution of the alpha doublet in X-ray reflections is
regained, at least in part, during recovery anneals at temperatures
below recrystallization.
The perfection of atom disposition on a space lattice is grossly
distorted during plastic deformation; the atomic planes become twisted
and distorted, and the atoms no longer occupy precision positions
on a space lattice but are distorted to positions less symmetrically
disposed. This distortion results in an increase in the internal energy
of the metal, and a somewhat localized distribution of the energy.
The partial stress removal during recovery is probably associated with
a partial rearrangement of the space lattice, straightening of slip
planes, and return of atoms to positions more closely approximating
the unstrained space lattice. These processes are brought about by the
influence of heat, which permits a greater thermal vibration of the
atoms with resultant diffusion or movement of atoms to satisfy par-
tially the trend toward returning to the stable condition. The influence
of heat, however, is not great enough to permit a complete rearrange-
ment of the atoms on the space lattice, and the complete relief of stress
is not obtained.
Click to expand...
Are you the author of that work?
 
1911nut said:
This is the only part you need

“The perfection of atom disposition on a space lattice is grossly
distorted during plastic deformation; the atomic planes become twisted
and distorted, and the atoms no longer occupy precision positions
on a space lattice but are distorted to positions less symmetrically
disposed.”
Click to expand...
That's one of those double talking guys with a little word salad mixed in.
 
CJ6 said:
For Gods sakes man......Buy her another house to put her kitchen table in..........
Click to expand...
Spit out my coffee laughing at this one.

I was sending some 'rounds' downrange when I was informed that 'round' is a two dimensional term. Since bullets are 3 dimensional it's more accurate to say pointy sphere.
 
When im putting my bullets in the clips and getting ready to fire I'll be thinking about all this.

I know you know what I'm talking about !
 
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