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 3/4 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)

  • Supplemental Notes:
    • See also AD-636 733.
  • Corporate Authors:

    Pennsylvania State University, University Park

    Pennsylvania Transportation Institute, Transportation Research Building
    University Park, PA  United States  16802
  • Authors:
    • Klier, E P
    • Prater, T A
    • Wagner, F C
    • Mack, J O
  • Publication Date: 1947-3-19

Media Info

  • Pagination: 133 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00327717
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: SSC- 9 Prog Rpt.
  • Contract Numbers: NOBS-31217, NOBS-34231
  • Files: TRIS
  • Created Date: Feb 18 1981 12:00AM