Some Observations on the Yield Point of Low-Carbon Steel

Abstract
A study has been made of the yield-point phenomena in low-carbon steel with the view of determining the mechanism of the transition of the metal from the elastic to the plastic state. Unlike copper and aluminum, low-carbon steel does not yield in tension until an excessively high elastic resistance has been built up. This high elastic resistance is the upper yield point. The upper yield point is believed to be of fundamental importance in the Lüders’ line phenomena, and experimental evidence is given which supports this view.

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