The graph shows data gathered from a series of Charpy impact tests on a tempered 4340 steel alloy. Determine the temperature corresponding to the 95% bound of maximum impact energy.

Which of the following annealing process Negate effect of cold working by (recovery/ recrystallization) O a. O b. 0 с. O d. Process anneal Spheroidize Normalize Stress relief

12. What are is an impact tests. Sketch the impact testing machine setup and explain the basic principle of toughness determination from it. What is DBTT? sketch the impact energy vs temperature curve for plain carbon steel and discuss why do many materials become brittle at low temperatures.

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What is the maximum internal flaw size allowable for a 304 Stainless steel alloy that is loaded to a stress two thirds of its yield strength (205 MPa) and it has a fracture toughness of 95 MPa.m0.5. Assume a value of 1.3 for Y

Question 5: Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) 100 75 50 25 0 -25 -50 -65 -75 -85 -100 -125 -150 -175 Impact Energy (J) 89.3 88.6 87.6 85.4 82.9 78.9 73.1 66.0 59.3 47.9 34.3 29.3 27.1 25.0 (a) Plot the data as impact energy versus temperature. (you can use Excel or other software). (b) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (c) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J.

And aluminum alloy designated as 300–816 aluminum means the following 3XXX aluminum Magnice alloy, which has not been modified, specific alloy 03 in the Ally series, strain hardened only, with a 3/4 hard temper. True or false.

Please do it typed not handwriting. Make sure the answer is correct Don't copy from any other online answers please