Accession Number : ADA117059

Title :   Evaluation of Fracture Criteria for Ship Steels and Weldments.

Descriptive Note : Final rept.,

Corporate Author : LEHIGH UNIV BETHLEHEM PA

Personal Author(s) : Pense,Alan W

PDF Url : ADA117059

Report Date : Jan 1981

Pagination or Media Count : 53

Abstract : The purpose of this report is to review in the light of currently existing data the fracture-toughness guidelines for welded ship hull steels first proposed in 1974. The essence of the guidelines was an NDT temperature requirement of 0 deg F for steel used in primary load-carrying members and an NDT temperature requirement of 20 deg F for steels used in secondary load carrying members. A subsidiary requirement for primary members was a dynamic tear energy in 5/8 in. specimens, depending on steel strength, of 250 to 500 ft-lb. at 75 deg F. Crack-arrest materials would be required to have a dynamic tear energy in 5/8 in. specimens, again depending on steel strength, of 600 to 800 ft-lb. at 32 deg F.

Descriptors :   *Steel, *Weldments, *Ships, *Ship hulls, *Fracture(Mechanics), *Test and evaluation, Welds, Toughness, Strain rate, Cracks, Arresting(Process), Transition temperature, Charpy impact tests, Strength(Mechanics)

Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints
      Marine Engineering
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE