Lab #4 Write Up

Lab #4 Write Up - ME 324 Lab Lab#4-Metal Forming Group#6...

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ME 324 Lab Lab #4-Metal Forming 4/6/2011 Group #6 Lab TA Lin Liu Justin Allen, Kyle Zibrowski, Muhammad Amir, Matt Montalbano, Vishal Bakshi, Wenbin Chen
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Table of Contents Intro The purpose of this lab is to practice metal forming and observe how strain rate affects performance in metal forming. Using the equipment from the lab, samples of AISI 1020 steel, aluminum, and stainless steel will all be bent. This lab shows the effects at various loads will have on different types of metals. The metal deformation process is a very important one to manufacturing engineering. A manufacturing engineer must know to very precise detail, how the metal will act when put under various stresses and strains. The three point bending test is a very simple and very old method of testing various material properties. It is set up by resting a piece of the testing material on two supports. A force is then applied at the midpoint between these supports and data is recorded. There are various material properties that can be obtained using this method. This lab will show the procedure of a bending test as well as show the physical happening of springback. By putting a material through the three point bending test it is easy to see when springback occurs. 2
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Background The most important effect in metal forming is known as springback. Springback is when the metal relives itself and tries to return back to its relaxed position. In metal forming, plastic deformation is used to change the shape of metal work pieces. A load is applied until the resulting stresses exceed the yield strength of the metal. The metal deforms and assumes a new shape. The strength of most metals will increase when deformed due to strain hardening. Ductility can also be increased in metals when the
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Lab #4 Write Up - ME 324 Lab Lab#4-Metal Forming Group#6...

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