Paper , Order, or Assignment Requirements

1. (a) Explain the three stages of annealing treatment in 2-3 sentences

• Explain any five properties that we can measure using a stress-strain curve under uniaxial tensile 10 points

2. What are the 4 strengthening mechanisms of metals? Explain each mechanism in 4-5 sentences. 10 points
3. Consider a cylindrical specimen of some hypothetical metal alloy that has a diameter of

10.0 mm. A tensile force of 1500 N produces an elastic reduction in diameter of 6.7 × 10– 4  mm. Compute the elastic modulus of this alloy, given that Poisson’s ratio is 0.35.

10 points

4. A 0.505-in.-diameter aluminum alloy test bar is subjected to a load of 25,000 lb. If the diameter of the bar is 0.490 in. at this load, determine (a) the engineering stress and strain and (b) the true stress and 10 points
5. (a) A 10-mm-diameter Brinell hardness indenter produced an indentation 2.50 mm in diameter in a steel alloy when a load of 1000 kg was used. Compute the HB of this material.
   • What will be the diameter of an indentation to yield a hardness of 300 HB when a 500-kg load is used? 10 points