Morbius, I'm well aware of what FCC and BCC structures are as are others here, but you might want to look up Dr. Rolf Hummel's book wherein he exhaustively explains in technical terms how and why the break-in phenomenon occurs, covering high and low temperature annealing among other topics. From those who have the book, it is a definitive reference. Few have the equipment and know-how to measure it, but it can be done. I believe Dr. Hummel is at Univ. of Florida.
Brian Walsh
engineer, audiophile and dealer
Brian Walsh
engineer, audiophile and dealer