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Structural Research Series 318PDF


Title:Fatigue of Plates And Weldments In High Strength Steels
Author(s):Radziminski, J.B.; Hinton, R.W.; Meinheit, D.F.; Osman, H.A.; Bruckner, Walter Herbert; Munse, W.H.
Subject(s):Plates (Engineering) --Testing
Welded joints --Testing
Steel --Fatigue
Abstract:An evaluation of the axial fatigue behavior of transverse buttwelded joints in HY-100 steel is presented. Welding procedures, using MIL-12018 and MIL-11018 electrodes, have been developed in which the defect density is held to a minimum. Specimens welded in accordance with these procedures initiated fatigue failures on the surface at the stress raiser created by the geometry at toe of the weld. Fore these members, the S-N curve for the life range from 10⁴ to 10⁶ cycles is presented for a stress cycle of zero-to-tension. Radiographic and ultrasonic inspections were used to study fatigue crack initiation and propagation originating at an internal weld flaw. A preliminary investigation of the axial fatigue behavior of MIG weldments in HY-130/150 steel is reported. The majority of the transverse butt-welded specimens prepared at each of three laboratories initiated fatigue failures at a variety of internal defects when subjected to a cyclic maximum stress of approximately half the ultimate strength of the base metal. Several alterations in the standard MIG welding procedures were studied in an effort to improve the weld quality; however no modification has been entirely successful in eliminating all the defects which have proven to be critical points for fatigue crack nucleation.
Issue Date:1967-02
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-318
Genre:Technical Report
Sponsor:The Naval Ship Systems Command, U.S. Navy, under Contract N0bs 94232, Project Serial No. SF-020-01-05, Task 729-0
Date Available in IDEALS:2010-01-07
Identifier in Online Catalog:666455

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