Report two - September 24, 2007 Mrs. JoAnne Scales Section...

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September 24, 2007 Mrs. JoAnne Scales Section 10, Thursday 1-4pm Materials Science and Engineering Program Vanderbilt University Nashville, TN 37235 Dear Mrs. Scales, The lab completed on Thursday, September 13, 2007 is summarized and explained here. The purpose of the experiment is to determine the effects of cold working on the microstructure and physical qualities of steel samples. The quantifying measurements include a Rockwell hardness test and a load bearing tensile test. The projected effect of cold rolling 1008 Steel is an increase in dislocation density resulting in an increase in yield stress and hardness, and a decrease in ductility and elongation to failure. The lab divided into three groups, each responsible for the cold rolling and testing of one sample. The three samples were rolled to 85% of the original thickness, 70% of the original thickness, and 55% of the original thickness. Each group takes initial measurements using vernier digital calipers. Using the rolling mill, groups reduce the
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Report two - September 24, 2007 Mrs. JoAnne Scales Section...

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