This is the initial data we started with. Super high! 79.3% of the published value. Sounds fishy? That's because it is!!! Thus began our exploration of how this steel got to be so strong.
Initial grain structure, showing very small, rigid, grains.
This chart was the beginning of our problem solving stage. We were able to experimentally and statistically rule out what options didn't fit.
Post annealed sample of 1018 CRS. Look at all that smooth softness!
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Fatigue Characteristics of 1018 CRS

My team was handed a piece of steel and was told, "This is 1018 cold rolled steel, now prove it." With our first test (a tensile test), we were getting values that were probably 67% higher than the suggested value. From this stemmed the beginning of us determining what aspect of the process along the way caused the steel to test high. Sounds easy, but we had to prove every step along the way, why we were doing certain tests. In the end we achieved the same results as everyone else in our class. Only due to my strategic planning, we ended up proving what our hypothesis was for about $10,000 dollars less than the other groups. :) That savings spells Pride.

For a look at the full report, contact me. :) (It's got more awesome pictures of metal grain structures)

Kayla Sandoval
Mechanical Engineering and Technology student @ RIT Rochester, NY