Low Cycle Fatigue of Butt Weldments of HY-100(T) and HY-130(T) Steel.
Progress rept. no. 3, 1 Aug-31 Oct 69.
ILLINOIS UNIV AT URBANA DEPT OF CIVIL ENGINEERING
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Data from low cycle, axial fatigue tests of HY-130T plain plates and butt weldments, and HY-100T plain plates are presented. The fatigue test results of plain plates of HY-130T material descaled and painted are compared to the data for earlier specimens tested with the mill scale intact. Tests of HY-130T butt-welded specimens fabricated by two procedures, one using a coated electrode and the other a second generation GMA wire have been conducted at a stress cycle of 0 to 80 ksi. The behavior of both sound weldments and weldments with intentionally introduced defects such as porosity, lack of fusion, lack of penetration, transverse cracking and slag has been examined. The results of radiographic examinations of fatigue crack initiation and propagation in the defective weldments are reported. Three plain plates of HY-100T material grit blasted were tested in fatigue, two at 0 to 80 ksi and one at 0 to 100 ksi. These preliminary data are compared with the results of similar tests conducted using earlier HY-100 plate material on which the mill-scale remained intact. Two welding wires, one a coated electrode and the other a GMA wire, will be used to fabricate the HY-100T butt-welded specimens. The qualification test results and a description of the welding procedure adopted for the coated electrode are reported. Author
- Metallurgy and Metallography
- Couplers, Fasteners and Joints