CORRELATION OF LABORATORY TESTS WITH FULL SCALE SHIP PLATE FRACTURE TESTS.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK
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The report summarizes the results which have been obtained to date on notched beam impact testing, and metallographic examination of the ship plate steels. In Part I of this report it is shown that the standard Charpy impact test using either the V- or keyhole-notch or a special 34 in. wide specimen is not capable of evaluating the ship plate according to the data which have been obtained for large plate specimens. However, by using Charpy keyhole-notch specimens which have been strained 10 in tension and which have been allowed to stand at room temperature for one month, test data have been obtained which allow the prediction with fair accuracy of the transition temperature in the large plates. In Part II the microstructures of the project steels have been considered. It has been shown that no simple alteration in microstructures can be found to account for the profound variation in energy absorption characteristics in the series of steels which have been studied. It has been shown that variations in grain size in a given steel cause large changes in the energy absorption characteristics of that steel. Author
- Properties of Metals and Alloys
- Marine Engineering