6. Which one of the following is the correct definition of ultimate tensile strength, as derived from the
results of a tensile test on a metal specimen:
(A) the stress encountered when the stress-strain curve
transforms from elastic to plastic behavior,
(B) the maximum load divided by the final area of the
specimen,
(C) the maximum load divided by the original area of the specimen,
(D) the stress observed
when the specimen finally fails
(E) none of the above?
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