Accession Number : ADA141261

Title :   Corrosion Fatigue Crack Growth Rates of Weldments in Q1N Steel,

Corporate Author : ADMIRALTY MARINE TECHNOLOGY ESTABLISHMENT POOLE (ENGLAND)

Personal Author(s) : Jones,B F ; Galsworthy,J C

PDF Url : ADA141261

Report Date : Jun 1983

Pagination or Media Count : 33

Abstract : Low frequency fatigue crack growth rates in air and seawater are reported for manual metal arc, synergic metal inert gas, electron beam and laser beam welds in Q1N steel. The stress corrosion crack growth susceptibility in seawater of the weldments was also studied and both the electron beam and laser beam welds exhibited susceptibility whilst the other welds and parent steel did not. All welds except the 'as-welded' laser beam welds showed silmilar fatigue crack growth rates to the parent plate. When tested in seawater the laser beam weld was found to exhibit exceptionally fast crack growth rates. The factors influencing fatigue crack growth in weldments are discussed. (Author)

Descriptors :   *Steel, *Weldments, *Fatigue(Mechanics), *Crack propagation, *Stress corrosion, Sea water, Air, Oxygen, Fracture(Mechanics), Rates, Welds, Electron beams, Inert gas welding, Laser welding, Arc welding, Heat treatment, Toughness, Structural analysis, Test methods, Marine engineering

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy
      Marine Engineering
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE