A sheet of BCC iron 1 mm thick was exposed A sheet of BCC iron 1 mm thick was exposed to a carburizing gas atmosphere on one side and a decarburizing atmosphere on the other side at 725(C. After having reached steady state, the iron was quickly cooled to room temperature. The carbon concentrations at […]
A specimen of ductile cast iron having a rectangular cross A specimen of ductile cast iron having a rectangular cross section of dimensions 4.8 mm ( 15.9 mm (3/16 in. ( 5/8 in.) is deformed in tension. Using the load-elongation data tabulated below, complete problems (a) through (f). (a) Plot the data as engineering stress […]
A specimen of aluminum having a rectangular cross section 10 A specimen of aluminum having a rectangular cross section 10 mm ( 12.7 mm (0.4 in. ( 0.5 in.) is pulled in tension with 35,500 N (8000 lbf) force, producing only elastic deformation. Calculate the resulting strain.
A specimen of a 4340 steel alloy having a plane A specimen of a 4340 steel alloy having a plane strain fracture toughness of 45MPavm (41ksivin) is exposed to a stress of 1000MPa (145,000psi). Will this specimen experience fracture if it is known that the largest surface crack is 0.75 mm (0.03 in.) long? Why […]
A specimen 750 mm (30 in.) long of an S-590 A specimen 750 mm (30 in.) long of an S-590 alloy (Figure) is to be exposed to a tensile stress of 80MPa (11,600psi) at 815(C (1500(F). Determine its elongation after 5000 h. Assume that the total of both instantaneous and primary creep elongations is 1.5 […]
Find the instantaneous time sinusoidal functions corresponding Find the instantaneous time sinusoidal functions corresponding to the following phasors: (a)V – 5ejπ/3 (V), (b)V – j6e jπ/4(V), (c)I – (6 + j8) (A), (d)I – – 3 + j2 (A), (e)I – j (A), (f)I – 2e jπ/6(A).
A single crystal of aluminum is oriented for a tensile A single crystal of aluminum is oriented for a tensile test such that its slip plane normal makes an angle of 28.1( with the tensile axis. Three possible slip directions make angles of 62.4(, 72.0(, and 81.1( with the same tensile axis. (a) Which of […]
A solution heat-treated 2014 aluminum alloy is to be precipitati A solution heat-treated 2014 aluminum alloy is to be precipitation hardened to have a minimum tensile strength of 450 MPa (65,250psi) and a ductility of at least 15%EL. Specify a practical precipitation heat treatment in terms of temperature and time that would give these mechanical […]
A random poly(isobutylene-isoprene) copolymer has a number-avera A random poly(isobutylene-isoprene) copolymer has a number-average molecular weight of 200,000 g/mol and a degree of polymerization of 3000. Compute the fraction of isobutylene and isoprene repeat units in this copolymer.
A sheet of steel 1.5 mm thick has nitrogen atmospheres A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200(C and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel at this temperature is 6 ( 10-11 m2/s, and the diffusion flux is found […]