Main Question or Discussion Point
Does Young's Modulus change with drastic changes in size? For example, suppose you exert a force on the micro scale or maybe even the nano scale. Would the same Young's modulus uphold at such a small scale?
That doesn't only apply to "very small" specimens. There are engineering components (e.g. jet engine turbine blades) made from single metallic crystals with sizes of the order of 10 to 100mm.For small specimens, I suspect that things are different. The YM, as usually measured for a metal, is pretty much axis-independent. This is because metals are usually polycrystalline, so the specimen contains many randomly orientated small crystals. A very small specimen wouldn't, so one might expect to get different values of the YM according to orientation of specimen.