Accession Number : AD0635171

Title :   THE FUNDAMENTAL FACTORS INFLUENCING THE BEHAVIOR OF WELDED STRUCTURES UNDER CONDITIONS OF MULTIAXIAL STRESS, AND VARIATIONS OF TEMPERATURE, STRESS CONCENTRATION, AND RATES OF STRAIN.

Descriptive Note : Technical rept. 1 Jul 47-1 Sep 48.

Corporate Author : CASE INST OF TECH CLEVELAND OHIO

Personal Author(s) : Sachs, G. ; Ebert,L. J. ; Dana,A. W.

Report Date : 10 MAY 1949

Pagination or Media Count : 34

Abstract : A detailed study was made of a low carbon ship plate steel, both 'as received' and 'as welded', by utilizing hardness tests and eccentric notch bar static tension tests at various temperatures. Considerable nonuniformity was revealed in the 'as received' plate, that is, localized areas showed relatively high transition temperatures. A brittle-ductile transition zone was found to exist between -40 and -80F for the investigated steel. A zone of maximum hardness occurred at the junction of the weld metal and the heat affected zone, from which the hardness (Rockwell B) approached that of the unaffected plate. A zone of minimum ductility (eccentric notch strength) was found 0.3 to 0.4 inch from the weld centerline. This zone was located by using the eccentric notch bar tension test at low temperatures. The zone of low ductility is thought to be the zone which is heated to the maximum subcritical temperature, with the further possibility of embrittlement by strain aging and intermediate transformation products. (Author)

Descriptors :   (*WELDS, *SHIP PLATES), (*STEEL, WELDS), FAILURE(MECHANICS), HARDNESS, TRANSITION TEMPERATURE, DUCTILITY, STRESSES, TEMPERATURE, NOTCH TOUGHNESS

Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE