Lamellar tearing is a separation in the parent or base metal caused by through-thickness strains. These strains are usually induced by weld metal shrinkage under conditions of high restraint. This manual provides specific recommendations for controlling lamellar tearing in the types of steels used in the construction of ships and offshore platforms. A brief description of the characteristics and mechanism of lamellar tearing shows that for lamellar tearing to occur there must be a critical combination of material susceptibility, and welding procedures and joint design which permit the development of high through-thickness strains. Tee (T) and corner joints, used extensively in ships and offshore structures, are the two basic joint configurations most susceptible lamellar tearing. However, the incidence of lamellar tearing has been extremely rare in shipbuilding. The problem of lamellar tearing is considerably more significant in mobile and fixed offshore drilling platforms which use thick plates in highly restrained T-and cruciform joints. The factors which contribute to and influence lamellar tearing are grouped into three categories: joint design, material selection and fabrication procedures. (DePo)
Significance and control of lamellar tearing of steel plate in the shipbuilding industry
Bedeutung und Verhinderung des Abblaetterns von Stahlplatten in der Schiffbauindustrie
US Government Reports ; May ; 1-85
1979
85 Seiten
Report
English
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