Tensile Testing For Metallic Materials Essay

1086 Words Sep 22nd, 2015 5 Pages
INTRODUCTION
Tensile testing for metallic materials is classified under the ASTM (American Society for Testing and Materials) designation E8/E8M and described as “tension testing of metallic materials in any form at room temperature” to determine “yield strength, yield point elongation, tensile strength, elongation, and reduction of area” (see Figure 1) [1]. This test is the standard to classify a material’s “strength and ductility under uniaxial tensile stresses” and results can be “useful in comparisons of materials, alloy development, quality control, and design under certain circumstances” [1]. The objective of the lab was to conduct an ASTM tensile test on the assigned material of Aluminum 7075, a “very high strength material used for highly stressed structural parts” [2]. With a Young’s Modulus of 10.4 x 106 pounds per square inch (psi), the Aluminum 7075 alloy is used for many applications and is primarily composed of Aluminum (87.2 to 91.4%), Zinc (5.1 to 6.1%), Magnesium (2.1 to 2.9%), Copper (1.2 to 2.0%), and trace amounts of Iron, Silicon, Manganese, Chromium, Zirconium, Titanium, and other metals and is produced in multiple tempers including 7075-0, 7075-T6, and 7075-T651 [3]. For this test all pretreatments were unknown. Based on the research above, it is expected that the test material is to have a Young’s Modulus of 10.4 x 106 psi and exhibit an Ultimate Tensile Strength (UTS) of 83,000 psi.
METHODS
The lab was conducted in accordance with the ASTM E8…

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