Metallurgical Engineering
2023 · Paper 1
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Complete GATE MT 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionMTNAT2 marksNeeds review
A specimen containing maximum initial surface crack of size 1.5 mm is subjected to cyclic loading with
and
. Assuming specimen geometric factor of 1, and referring to the given figure, the crack growth rate in
m cycle
is __________ (round off to nearest integer).
Given: N = number of cycles
a = crack length
R = stress ratio
= stress intensity rangeLog in to check the answer
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Open questionMTNAT2 marksNeeds review
A 200 mm thick slab is rolled using 500 mm diameter rolls under cold rolling and hot rolling conditions, separately. The coefficient of friction is 0.04 in cold rolling and 0.4 in hot rolling. The ratio of maximum possible thickness reduction in cold rolling to that in hot rolling is __________ (round off to 2 decimal places).
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