Tensile Testing and Hardness Testing of Various Metals

Tensile Testing and Hardness Testing of Various Metals

Technical Report Submitted to: Dept. of Industrial & Manufacturing Engineering Prof. Edward C. De Meter 310 Leonhard Building

The Pennsylvania State UNiversity University Park, PA 16802

Submitted by: Team: 4

Pavel Shusharin, Erik Venuti

Matthew Prevost David Hontz

Date: 2/10/16

Table of Contents Methodology Analysis

Analysis of data obtained with an extensometer Analysis of true stressstrain for ductile materials

Investigation Methodology The metals that were tested in the lab:

Cold Rolled Annealed Steel 6061 Aluminum 1018 Hot Rolled Brass Cast Iron Our group tested: Cold Rolled Annealed Steel

The measurements that were taken:

1) Tensile Test a) Time b) Position c) Force d) Change in length

2) Rockwell Hardness 3) Brinell Hardness 4) PreTensile Test measurements

a) Gage Width b) Gage Thickness c) Gage Length 5) PostTensile Data a) Gage Width b) Gage Thickness c) Permanent Length Between Jaw Alignment Marks

The Mechanical properties that were derived: 1) Young's Modulus 2) Engineering and True Strain at Yield point 3) Ultimate Tensile Stress 4) Engineering and True Strain at UTS 5) Ductility 6) Engineering and True Shear Strain 7) True Strain at Fracture 8) Measured and Predicted Max True Stress 9) Strain Hardening exponent 10) Strength Coefficient 11) Predicted toughness

Analysis of data obtained with an extensometer.

For each metal: Engineering stressstrain plot with a figure caption Additional graph that shows a 0.2% offset and includes a trend for the linear portion of the graph Table with e0, eu, E, y (shear strain), UTS and ductility. Brass

Figure 1.1 Engineering stressstrain plot for Brass The shape of this plot indicates this Brass is a ductile metal It does not appear the extensometer slipped during this tensile test

Figure 1.2 Engineering stressstrain plot of the elastic region with 0.2% offset

Table 1.1 Table of mechanical properties of Brass

e0(in/in)

eu(in/in)

E (ksi)

y (ksi)

0.0044

0.2058

16042

38.0

UTS (ksi) 47.9

Ductility (%) 35

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