Lab #1 Report

Lab #1 Report - IOWA STATE UNIVERSITY ME 324 Lab #1 Tensile...

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Unformatted text preview: IOWA STATE UNIVERSITY ME 324 Lab #1 Tensile Tests Muhammad, Justin Allen, Matt Montalbano, Vishal Bakshi, Wnbin Chen, Kyle Zibrowski Section 6 Group 1 1 Table of Contents List of Figures List of Tables Executive Summary During the first ME 324 Lab three Engineering materials had been put through a tensile test by Lin Liu, the TA for the lab section. The materials tested were 1018 Steel, Gray cast iron and Aluminum 6061-T6. The purpose of the test was to show the material behavior of a brittle, ductile and in between metal material. The tensile test has been consistently used in industry for many decades. It is a relatively cheap test to perform and is able to output almost all of the material properties of a material. Questions may arise as to why a tensile test is still needed today if thousands have been done before on the same material. The answer, as will be apparent later in the report, is that varying manufacturing processes will produce varying material properties for a seemingly similar material. A SATEC Universal Testing Machine with a 24,000 lb load maximum was used for the tensile test. All the data was recorded on the MTESTQuattro software which allowed for load and displacement readout and plots. Load and displacement data were recorded for calculating various properties of the material. The report will include the process of the experiment, data and the results from the experiment. Also included in the report will be the output property values from the MTESTQuattro program compared to an online database with standard property values. Overall the comparison of the online database to the calculated values for the three separate material properties seemed to consistently vary. Although the overall behavior and stress-strain curve of the ductile and brittle material appeared as expected, the exact values of the various material properties were not exactly as expected. This can be contributed to the varying manufacturing techniques used to create the three different material test samples. Background & Introduction Ideally, in designing any machine element, the engineer should have available the results of a great many strength tests of the particular material chosen. Those tests should be made on specimens having the same heat treatment, surface finish, and size as the element the engineer proposes to design; and the tests should be made under exactly the same loading conditions as the part will experience in service. This means that if the part is to experience a bending load, it should be tested with a bending load. If it is be subjected to combined bending and torsion, it should be tested under combined bending and torsion. If it is made of heat-treated AISI 1040 steel drawn at 500C with a ground finish, the specimens tested should be of the same material prepared in the same manner. Such tests will provide very useful and precise information....
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Lab #1 Report - IOWA STATE UNIVERSITY ME 324 Lab #1 Tensile...

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