Metallurgical Engineering
GATE MT concept:high-cycle-fatigue PYQs
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How to practice concept:high-cycle-fatigue
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Questions 1–2 of 2. Imported answers require independent review unless marked reviewed.
Question 27
Open questionMTMSQ1 markNeeds review
Which of the following is/are responsible for reducing the high cycle fatigue life of a component?
Your answerSelect all correct options. You can choose more than one.
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Open questionMTNAT2 marksNeeds review
High cycle fatigue data for an alloy at various alternating stresses,
(see figure) is given below.Stress, (MPa) | , Number of cycles to failure |
|---|---|
500 | 1000 |
400 | 10000 |
300 | 100000 |
200 | 1000000 |
 |
A specimen of this alloy is subjected to multiple stress cycles sequentially in the following order: (i) first 5000 cycles at
MPa followed by (ii) 25000 cycles at
MPa and finally (iii) at
MPa. Assuming that Miner’s law is obeyed, the number of cycles to failure at the final applied stress of 500 MPa is __________.Log in to check the answer
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