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A pore found at a fracture origin most likely originated during

  • A.forming or sintering rather than in service
  • B.the final machining of the fired component
  • C.transport of the finished part to the customer
  • D.the chemical analysis of the starting powder

Answer: A

Correct answer: forming or sintering rather than in service

A pore is a void that was never filled, so it dates from when the body was consolidated - poor packing at forming, an agglomerate that left a hole, or incomplete sintering. Service loads open cracks rather than creating voids, machining leaves surface damage rather than internal pores, and analysis of the powder touches nothing that ends up in the part.

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