Answered: A cylindrical 4135 cold-rolled steel…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A cylindrical 4135 cold-rolled steel workpiece has an upsetting load applied at room temperature using an open-die forging with flat dies to a new height, ha = 50 mm, as shown below. The initial diameter is do = 220 mm, the initial height is ho = 180 mm. 4135 cold-rolled MPa=1100 Psi= 16000 Strain hardening exponent, n = 0.14 A) What is the diameter of the forging at the end of the forging stroke? B) What is the longitudinal true strain of the forging at the end of the forging stroke? C) What is the true (flow) stress required in the material at the end of the forging stroke? D) Using the average pressure formula, what is the corresponding coefficient of friction if the upsetting force at the end of the stroke is 170 MN?

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