specimen:
I can tell you a few more things about my processing of the specimen that will hopefully fill in a few more of the many missing pieces:
My specimen was about a 1.5" tall cylinder with a diameter of 3/4".
It was quenched in 4gal tap water (initial temp: 19.5C, final temp:26C)...
sample of 1045 steel, air cooled from ~800C for 15sec then water quenched. HRC of 43. Temperatures not really known. Air cooled in cool room. water was 26C intially.
My thinking: Theoretically the microstructure might be anything that lies along the time:15sec vertical line of the 1045 TTT...
