MEN255 Material Science HOMEWORK - 2
A cylindrical specimen having a diameter of 12,8 mm and a gauge length of 50,800 mm is pulled in
tension. Use the load–elongation characteristics shown in the following table to complete parts (a)
through (h) and present your work as a “Ms Power Point”file adding your voices.
Load
(N)
0
7330
15100
23100
30400
34400
38400
41300
Length
(mm)
50,800
50,851
50,902
50,952
51,003
51,054
51,308
51,816
Load (N)
44800
46200
47300
47500
46100
44800
42600
36400
Length
(mm)
52,832
53,848
54,864
55,880
56,896
57,658
58,420
59,182
Fracture
(a) Plot the data as “engineering stress” versus
“engineering strain”.
(b) Plot the data as “True stress” versus “True strain” up to
12th data point.
(c) Compute the modulus of elasticity.
(d) Determine the yield strength at a strain offset of 0,002.
(e) Determine the tensile strength of this alloy.
(f) What is the approximate ductility, in percent elongation?
(g) Which alloy would it be ? Explain the reasons.