Mr. me2, thanks for your interest in my notes concerning metal properties which may be relevant during burr formation.
Size effect, and the idea that smaller is stronger, has been a topic of material specialist for a long time. As far as I know the size effect is better understood for large structures like bridges and nuclear containments than for micrometre objects. https://en.wikipedia.org/wiki/Size_effec...l_strength.
Attached you can find an extended abstract entitled "Smaller is Stronger: An engineering induced size effect!"
Next reading may be P. Shade dissertation on small scale mechanical testing: https://etd.ohiolink.edu/!etd.send_file?...ion=inline
Jan