GATE ME 2018 Set 1 — Question 45
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Manufacturing Processes → Forming → Extrusion & Drawing
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Question
The maximum reduction in cross-sectional area per pass () of a cold wire drawing process iswhere represents the strain hardening coefficient. For the case of a perfectly plastic material, is
Correct answer
(D) 0.632
Solution
For a perfectly plastic material, the strain hardening coefficient .
Given the formula for maximum reduction:
Substituting :
Rounding to three decimal places, we get .
Given the formula for maximum reduction:
Substituting :
Rounding to three decimal places, we get .
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