Sapim CX Ray vs Alpina Hyperlite Aero

[Wet Noodle]

This is not elastic deformation what happens in cold forging.

Sure. Nobody claimed that, ever, but sure.

Just a quick recap:
@Sebastian: "CX-Rays are good, but Lasers are not stiff enough"
Me: "This doesn't sound right, as both are supposed to have the same stiffness (same material, same cross sectional area ...)."
You: "Yea, well, but also... [bunch of stuff that affects strength]."
Me: "The hammered section gets STRONGER, not STIFFER."
You: "[Some more stuff that affects STRENGTH]"

If you want to claim that cold working does increase material stiffness, would you mind producing something to support that claim? Like, anything (well, maybe a few steps above a reddit post, you get me). Mein Grundstudium ist wirklich schon extrem lange her und ich mache keinen Hehl daraus, dass ich den Großteil daraus vergessen habe I'm willing to learn.

No, they don't. Sapim give a tensile strength of 1500N /m2 for the Laser and 1600N / mm2 for the CX-Ray.

Stiffness is not tensile strength. Nor do the both correlate in a simple linear fashion. Again, your claim was about stiffness, not strength.

[Sebastian]

Correct me if I’m wrong @WetNoodle cuz I’m happy to learn.
But even for the exact same cross section of two objects, a difference in grain structure in the steel alloy will result in a different young‘s modulus, therefore one spoke might be more elastic than the other. And that will result in more or less lateral flex of the wheel, which is what most people (me included) experience as a stiff wheel (or not). And that is why I think these two spoke types result in a difference of (lateral) wheel stiffness.

[Sebastian]

Fatigue and impact are different things, but it's worth asking

Just because I’ve never seen it doesn’t mean it doesn’t happen. I’m pretty sure everything can break in a crash.

[Wet Noodle]

But even for the exact same cross section of two objects, a difference in grain structure in the steel alloy will result in a different young‘s modulus, therefore one spoke might be more elastic than the other.

From my limited knowledge (and depending on my mood), I'd answer something between plain "No, steel is steel" and "Most likely not in any meaningful way. But if it does, it should go in the other direction (from what little I could find on it) -> strength goes up, but Young's modulus goes down".

It is said that strength is hugely impacted by grain structure, while Stiffness is mainly defined by atomic bonds. Cold work will affect grain structure really quickly, while it will, to a certain degree, leave atomic bonds more or less alone (only relatively speaking). Going further (higher strain), you get more and more "broken" atomic bonds and it might indeed measurably affect young's modulus, but the stuff will get less stiff, not more.

That said, I still highly doubt there'd be a measurable difference in stiffness beyond measuring error between two wheels, everything the same apart from one being laced with Lasers and the other one with CX-Rays.

[Sebastian]

Interesting. Well, maybe it is all in my head then. There’s a difference in second moment of area between aero spokes and round spokes in general. That would likely lead to a difference in stiffness under torsional load. Maybe it’s that? Easiest would be to measure it. I don’t have wheels with Lasers lying around though. 

[Wet Noodle]

In a tensioned bicycle wheel of common proportions, spokes are just tension members, like ropes.