CAUSES OF CLEAVAGE FRACTURE IN SHIP PLATE: HATCH CORNER TESTS.
Progress rept. 1 Sep 45-1 Mar 46.
CALIFORNIA UNIV BERKELEY
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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
- Properties of Metals and Alloys
- Marine Engineering