Accession Number : AD0626989

Title :   FATIGUE AND STATIC PROPERTIES OF WELDED JOINTS IN LOW ALLOY STRUCTURAL STEELS, II,

Corporate Author : ILLINOIS UNIV URBANA DEPT OF CIVIL ENGINEERING

Personal Author(s) : Nordmark,G. E. ; Shoukry,Z. ; Stallmeyer,J. E.

Report Date : JAN 1956

Pagination or Media Count : 78

Abstract : An investigation was made to determine the fatigue and static properties of butt-welded joints in A-242 steel and to compare, quantitatively, these results with those obtained from similar joints in A-7 steel. Tests were performed on three low alloy steels having appreciably different chemical compositions to determine the uniformity of the results. The report includes the results of tests of four types of specimens: plain plate specimens, longitudinal fillet-welded joints, and transverse and longitudinal butt-welded joints. All of the fatigue specimens were tested on a zerotension stress cycle of such a magnitude that failure generally occurred between 100,000 and 2,000,000 cycles. When subjected to repeated loadings the low alloy joints (welded with low hydrogen electrodes) were found to be about 15 per cent stronger than similar joints of A-7 steel prepared with E6010 electrodes. However, when compared to joints in A-7 steel prepared with E7016 electrodes, the advantage of the A-242 joints was less than 10 per cent for the butt-welded joints. The second phase of the investigation was carried out to determine whether brittle fracture would occur in a simple welded joint as a result of the stress concentrations inherent in a welded connection. The results of the few tests which have been conducted indicate that there is a considerable reduction in energy absorbing capacity (reduction of area and elongation), but little difference, however, in the strength or in the fracture appearance. (Author)

Descriptors :   (*STEEL, WELDS), (*WELDS, STEEL), FATIGUE(MECHANICS), STRUCTURAL PROPERTIES, STATICS, METAL PLATES, FRACTURE(MECHANICS), STRESSES

Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE