During the recovery of a cold-worked material, which of the following statement(s) is (are) true?
O Some of the internal strain energy is relieved.
O All of the internal strain energy is relieved.
O There is some reduction in the number of dislocations.
O There is a significant reduction in the number of dislocations, to approximately the number found in the precold-worked state.
O The electrical conductivity is recovered to its precold-worked state.
O The thermal conductivity is recovered to its precold-worked state.
O The metal becomes more ductile, as in its precold-worked state.
O Grains with high strains are replaced with new, unstrained grains.