Accession Number:

AD0636741

Title:

CAUSES OF CLEAVAGE FRACTURE IN SHIP PLATE: HATCH CORNER TESTS.

Descriptive Note:

Progress rept. 1 Sep 45-1 Mar 46.

Corporate Author:

CALIFORNIA UNIV BERKELEY

Report Date:

1946-07-24

Pagination or Media Count:

78.0

Abstract:

Six full scale specimens, similar in design to a hatch corner of a ship, were constructed from a low carbon, ship quality, semi-killed steel and tested to failure. One tested at 120 F gave a shear type fracture. All others tested at room temperature failed with cleavage type fractures. Two which were welded with preheat at 400 F showed superior performance, both in strength and energy absorption. Two which were fabricated by riveting gave inferior performance. An investigation was conducted to determine the effects of preheat and a comparison made with the effects of 1000 F postheat treatment for 8 hours. Studies were made of quarter scale symmetrical and asymmetrical hatch corner models to determine which type of specimen would best duplicate the stress condition existing in actual ships. Author

Subject Categories:

  • Properties of Metals and Alloys
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE