Discussion
Assertion (A): Fractography is a routine part of ceramic failure investigation.
Reason (R): The fracture surface records where the failure began and what flaw started it.
Answer: D
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the value of the technique. The fracture surface carries markings - the mirror, mist and hackle regions - that radiate from the origin, so the origin can be located and the flaw at it identified: a pore, an inclusion, an agglomerate, a machining scratch. Naming the flaw names the process step that produced it, which is what turns a failure into a correction.
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