Why "Cryo" anything?


Ok. So far, I have yet to think of a good explanation for "Cryo" treatment to enhance anything. Can someone explain this to me?

For background, I have a Master degree in Material Science Engineering. Here is my explaination why just "cryo" won't work.

At room temperature, the metal is already solid or frozen. Freezing it further won't do much. Most metals requires high temperature to cause any change in the microstructure or grain size/orientation/distribution. Simply freezing it for a few minutes will not change how it operates after the metal returns to room temperature.

Eric
ejliu
Jordan,

I mean no disrespect either. Though this thread was posted under the "tech" section I fail to see why it's scope should be limited as you suggest. The threadhead did not ask to keep replies to known measurements Or whatever other "true" scientific priciples you allude to. As one looks at the enitire process of science many phenomena are first observed long before they are measured. In fact, observation is the norm.

A few MSE "experts" have chimmed in with fairly exhaustive remarks gleaned from textbooks and even they exchanged disagreements about heat treated being required or not for cryo treatment to actually occur. Plain and simple, measured science is not at this time able to answer the posted question. Does this make the claim that cryo'ing works in the audio realm not true? No, as measured science cannot prove that negative either.

As I prepare to exit this troll I'd like to offer that I thought this was an audio site where enthusiasts share our experiences for the benefit of the passion we all enjoy. Thirty years ago the conventional wisdom was that interconnects and speaker cables didn't make a difference at all but today it's generally accepted, with the exception of a few flat earthers that hang around here, that wires can have a huge impact on component performance. Even after three decades science still isn't able to fully explain the "whys" but most audiophiles sure hear it.

I'm not sure that the nay sayers can even be involved in this hobby and are likely anti-audio. First, by their own standards set forth here it would be impossible for them to buy any one piece of equipment without first understanding in a measured way why it sounds the way it does. Comparing two amplifiers with nearly identical specifications and price would certainly place them in an emotional tailspin trying to understand why they sound so different. Second, while the advocates (or at least those with an open mind) post their systems therefore proving they belong in this community none of the naysayers are involved enough to do so.

Don't blame me for doubting the intentions I've taken issue with. A lack of historical helping within these threads, as well as being outside the statistical norm of regular contributors, is anecdotal evididence of the type that I use in discerning most things in life. Of course, no anecdotal evidence, no listening experiments and no human judgements are valid to you guys.

My offer to Ejliu to heat treat and cryo some brake pads for him is still open.
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Lugnut, I didn’t suggest the thread should be limited. I questioned why others chose to limit the discussion by suggesting that “if it sounds better, don’t worry about why”. Whether you like it or not, that IS a limiting statement!! This particular issue is unique in that it is much more easily investigated through theory as well as measurement. We can measure structural and compositional changes in the lattice very precisely. In the case of cables and other equipment, the number of variables and their interactions oftentimes precludes easy analysis of why something sounds better.

Furthermore, you have to admit that the number of different materials that are being cryo’d and claims of its superiority are a little over the top. Golf balls, fishing hooks, tennis rackets and pantyhose (no joke) all benefit from cryoing? All grades of steel, Aluminum, Copper, Silicon, plastics, composites all benefit from cryoing? This is the “hype” surrounding cryo treatment and it should make all of us at least suspicious of the claims, particularly if there is an economic motive by some, right? If you tried it for a given application and feel secure in the improvements, then great, but certainly you would agree that this anecdotal evidence would not necessarily apply to a different application with a different material, right?

As an “MSE”, I’ll concede that for a few specific grades of steel, cryo treatment is sometimes used to optimize a given property. Fortunately for us, it doesn’t put us into an “emotional tailspin” because there is valid science behind it. For highly alloyed steels, the original processing may have resulted in some retained austenite still present at room temperature. Lowering the temperature further can force this retained austenite to transform to martensite. This IS easily measured and understood! In almost all cases, this would be followed by tempering at somewhere close to 300C to allow some of the dislocations created from the transformation to relieve themselves. If you followed the same treatment for a grade of steel that did not have retained austenite, you get NO change in structure. This IS easily measured and understood!

Surely you don’t judge the validity of ideas based on whether an A-goner has his system posted or not, do you? If it helps you to take my intentions seriously, I have Magnepan 3.6 speakers, Parasound JC1 amps, Rowland Concerto linestage, APL Denon3910 Universal player, Purist Audio Museaus interconnect and speaker cables, and a PS Audio UPC-200 conditioner. My room is dedicated and I use ASC tube traps, homemade Helmholtz resonators (Argent Room Lenses), and Auralex diffusers. You have made some sweeping statements in your post trying to categorize those of us that are trying to understand the physics of THIS particular issue. Perhaps I’m wrong, but from your comments it seems as if you think true audiophiles are under attack in this thread from the “naysayers” and must band together to defeat them? I always thought I was a “true audiophile". Given my wife’s puzzled expressions and general disdain for the UPS delivery guy, I just assumed this was good enough empirical evidence to confirm that. Perhaps not?

Finally, I’m sure you’re not serious with this statement:
My offer to Ejliu to heat treat and cryo some brake pads for him is still open
I’m sure you are just saying this to make a point and wouldn’t actually want someone to be injured to prove it? Besides, from my read on Ejliu’s posts, he was only trying to suggest that heat treatment before cooling was necessary to change the structure and NOT that this change would be good and/or smart.
Interesting discussion from everyone. It's very similar to a discussion on proving existence of God.

Group A states that God must exist because they believes it to be so. Don't ask why. Just follow their "truth".

Group B simply asked to see if it's possible to scientifically prove God's existance. And they are treated as heretic and must be casted out of group A's wonderful society.

Maybe we should have a new policy on Audiogon's tech forum.
"Don't ask. Don't tell". Just follow the gospel according to "sohpiscticated audiophile".

Anyway, I will give up for sure now.

Eric