1. Stress Strain Curve of 250 Maraging Steel Bar at Various. Which material is stronger? 250 maraging steel at room temperature (RT) or 6061 T6 aluminum sheet a room temperature? Stress Strain Curve of 250 Maraging Steel Bar at Various Temperatures Stress, ksi Stress, ksi 300 240 180 Longitudinal 1/2-hr exposure -100 F RT 300 F 600 F 1000 F 120 60 800 F Maraging: strong steel with martensite structure. RT = room temperature 12 Strain, 0.001 in.in. 16 20 24 Stress Strain Curve of 6061 T6 Aluminum Sheet at Room Temperature 50 40 30 20 220 LT= L= 10 LT-tension L-tension 10 12 Strain, 0.001 in.in. Stress strain curves taken from MIL-HDBK-5J 31-January-2003 L= load is applied in longitudinal direction LT = load is applied in longitudinal transverse direction What do you think? Your answer cannot be more than 10000 characters. 2. For the same stress-strain curves in question 1, what is the approximate yield strength of 250 maraging steel at room temperature? (No need to do a 0.2% offset, just estimate from the graph) What do you think? Your answer cannot be more than 10000 characters. 3. For the same stress-strain curves in question 1, what is the approximate yield strength (Sy) of 6061 T6 aluminum sheet LT at room temperature? (No need to do a 0.2% offset, just estimate from the curve) What do you think? Your answer cannot be more than 10000 characters. 4. For the same stress-strain curves in question 1, assuming identical component geometry and identical elastic loading, which material will be stiffer? 250 maraging steel at room temperature OR 6061 T6 aluminum sheet at room temperature? What do you think? Your answer cannot be more than 10000 characters. 5. For the same stress-strain curves in question 1, what is the approximate modulus of elasticity of 250 maraging steel? What do you think? 6. Your answer cannot be more than 10000 characters. For the same stress-strain curves in question 1, what happens to the yield strength of 250 maraging steel as the temperature increases? What do you think? Your answer cannot be more than 10000 characters. 7. For the same stress-strain curves in question 1, a component is made of 6061 T6 aluminum sheet LT. A axial tensile stress of 50 ksi is applied at room temperature. Will the part yield? Why or why not?? What do you think? Your answer cannot be more than 10000 characters.