Cryogenics in Today's Society

The purpose of this experiment was to determine if cryogenically freezing materials would alter their hardness. Three different types of materials were tested: steel, brass, and aluminum. First, each materials's hardness was measured using a Rockwell Hardness Tester. Then each piece of material was subjected to extremely cold temperatures using liquid nitrogen vapors. The pieces were slowly brought down to a temperature of -196 C and were allowed to stay at that temperature over another eight hours. They were then slowly brought back up to room temperature over another eighth hour period. After testing, the Rockwell hardness was measured again. All materials, except one piece of steel, decreased in hardness.

Research Done By:

Amy Franzen

Aasim Jukaku