6.44 A cylindrical specimen of a brass alloy 10.0 mm (0.39 in.) in diameter and 120.0 mm (4.72 in.) long is pulled in tension with a force of 11,750 N (2640 lbf); the force is subsequently released....

6.44
A cylindrical specimen of a brass alloy 10.0 mm (0.39 in.) in diameter and 120.0 mm (4.72 in.) long is pulled in tension with a force of 11,750 N (2640 lbf); the force is subsequently released.

(a)
Compute the final length of the specimen at this time. The tensile stress–strain behavior for this alloy is shown in Figure 6.12.

(b)
Compute the final specimen length when the load is increased to 23,500 N (5280 lbf) and then released.

6.45

47.3 48.7 47.1 52.1 50.0 50.4 45.6 46.2 45.9 49.9 48.3 46.4 47.6 51.1 48.5 50.4 46.7 49.7

A steel alloy specimen having a rectangular cross section of dimensions 19 mm x 3.2 mm (3 in. x 1 in.) has the stress–strain behavior

tion to yield a hardness of 300 HB when a 500-kg load is used?