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2 to Problem 3 25 pts Follow the steps to determine the range of acceptable initial diameter of a cylindrical metal bar having a final diameter of 10 cm with at least 65 000 psi in tensile strength 60 000 psi in yield strength and 5 EL in ductility 5 1 What is the range of cold work in CW needed to give at least 60 000 psi in yield strength 2 pts obcw 410 2 What is the range of cold work needed to give at least 65 000 psi in tensile strength 2 pts CWB2 3 Strength psi 100 000 90 000 80 000 70 000 60 000 50 000 40 000 30 000 20 000 10 000 1 4 x100 A6 0 2 1 1 100 106 0 Tensile strength 3 What is the range of cold work needed to give at least 5 EL in ductility 2 pts 010 CW 480 pts 6 90 cw 10 1 1000 1 Ao Do 4 What is the range of cold work needed to meet all requirement for mechanical properties 6 pts 282 w 48 41 23 5 How to correlate the initial and final cross section area of the cylindrical rod to the amount of cold work 5 pts 0 CW Ao Ad Ad 1 Ao x 100 Yield strength Elongation T 20 40 60 80 Percent cold work H 010 au 100 obcw 100 41 Ao Ao Ad Ao 100 6 What is the range of initial diameter should be used to start the cold work process 8 TT 102 DX100 TT 100 90 80 70 60 50 40 30 20 10 100 486 96 01000 100 Ad 40 Ad 0100w A 010080 771 78 54 0100w 1 78 54 2007 100 4 Elongation 4T Do 10 986 90

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