Cryogenics of engine parts

[lmcchesney]

I have read the information on the use of cryogenics of engine parts for increased durability and agree there is just not a head to head comparison found. However, I have not found a negative aspect of cryogenic parts except for a few antidotal experiences which have multiple other variables.
Does anyone know of a science dept. tech site that describes the technique of cryogenics of metal parts?
The information I have is very mixed. Some state the need to bring up to 300-400°F (allow re-lattice structuring) to no need for heating. It seems all us a step wise temp lowering process. Some with computer controlled cooling to -325°F and holding for 24hours.
I have significant experience in the cryopreservation of cells. In deed, when we first started, we required a $10,000 chamber to lower the cells at 1°C/min to -70° and then transfer to liquid nitrogen for prolong storage. Some years ago, we found the controlled freezing was not need for cell viability and with the utilization of inexpensive chamber containing alcohol approximated the freezing rate. Cells are much more sensitive to temp changes than metal. I would be willing to try a similar cryo technique using step wise cooling. Heat to 300°F (163°C). Cool to 20°C(room temp), then to 4°C in refrigeration, to -10°C in the freezer, then to -100°C in dry ice then to -476°C in liquid nitrogen.
Similar but more rapid return to room temp after 24 hours.
This is logistically difficult, but practical at home for DIY.
Others thoughts, experience?
L.McChesney