lab8 - CE 497 Tensile Stress of Metal Section 5 Hui Fan...

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CE 497 Tensile Stress of Metal Section 5
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Hui Fan 3/30/2009
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INTRODUCTION In this lab, experiments were conducted to investigate the relationship between metal composition and its mechanical property and the relationship between the metal processing type and its properties. We especially looked into the behavior of the metal in the plastic region. We applied uniaxial tensile load to the three specimens and measure the elongation and the diameter. We then tabulated and plotted data to find and compare the material properties of specimens. We expected the higher carbon will make the material have higher tensile stress. PROCEDURE In this experiment, we applied tensile load to three specimens. The load and the axial elongation of the specimen will be measured continuously during the test. The loading will be halted periodically for diameter measurement. Hence we have both data for the elongation and reduction of diameter. The specimens we used in this are 1020 HR steel, 1020 CR steel and 1090 HR steel. 1090 HR has higher carbon content than 1020 HR but different processing type. 1020HR and 1020 CR have different processing type but same content of carbon. Use the data we have, we can construct stress-strain graph for all three specimen. We first plotted one load vs % elongation graph for three specimens which helped use to compare the
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lab8 - CE 497 Tensile Stress of Metal Section 5 Hui Fan...

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