MatE271
HW #6
Due Friday 11/7/2001 in class
Write neatly and legibly and please remember to write your name on your answer sheet
No late HW will be accepted, regardless of the reason
Remember your second exam on Wednesday, Nov. 12
Material structure vs. Mechanical Behavior
total 15 points
1. Problem 6.2 pp 245 (Class text; Shackelford, 2001)
2. Problem 6.4 pp 245 (Class text; Shackelford, 2001)
3. Problem 6.5 pp 245 (Class text; Shackelford, 2001)
4. Using the scale of Brinell hardness (pp220-Tab 6.10), which is a n equivalent for
(H=P/Ap), solve problem 6.47 pp 248 (Class text; Shackelford, 2001)
5. Using the attached stress-strain curve for brass, evaluate the following.
(a) Yield strength
(b) Tensile strength
(c) Fracture stress
(d) Ductility
(e) Toughness
6. Using the same stress-strain characteristics, if you stretch a bar of this brass such that
the final cross sectional area is reduced by 20%.
(a) What would be the expected yield strength of the stretched bar?
(b) Do you know a technical name of this process?
(c) What type of microstructure would you get after stretching?