The figure below shows the tensile stress- strain behavior for 4 different materials ( W, X, Y, Z). Using this figure, answer the following questions. S 800 700 600 500 400 300 200 100 0 Stress (MPa) W #ex 4 0 E Ep EE 0.5 1 Strain questions: 1. Rank the materials in order of increasing Young's modulus 2. Which of the materials shows the highest toughness? 3. Which of the materials shows the highest ductility? 1.5 KARMEINS Laruncall 4. What is the tensile strength of the material X? 5. Materials X and Y are both strained to a value of 0.1. Which one yields first ? 5. Materials X and Z are both strained to a value of 0.45. Will either or both show necking? 7. If a sample of material X is strained to a value of 0.4 and the load is then removed, What will happen to the sample? 2