Discontinuities produced during hot or cold working of the ingot into rod or bar to make studs are called which?

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Multiple Choice

Discontinuities produced during hot or cold working of the ingot into rod or bar to make studs are called which?

Explanation:
Discontinuities that appear during hot or cold working of an ingot into rod or bar are called primary processing discontinuities. This naming reflects that the defects originate in the initial forming stage, when the metal is being deformed to create a semi-finished shape. Inherent discontinuities are already present in the material before shaping (like casting porosity), service-induced occur during use, and secondary processing discontinuities arise in later steps after the initial forming (such as heat treatment or finishing). Since these defects arise specifically from the primary shaping operation, the term primary processing discontinuities best fits.

Discontinuities that appear during hot or cold working of an ingot into rod or bar are called primary processing discontinuities. This naming reflects that the defects originate in the initial forming stage, when the metal is being deformed to create a semi-finished shape. Inherent discontinuities are already present in the material before shaping (like casting porosity), service-induced occur during use, and secondary processing discontinuities arise in later steps after the initial forming (such as heat treatment or finishing). Since these defects arise specifically from the primary shaping operation, the term primary processing discontinuities best fits.

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