Transverse butt welds and longitudinal fillet weldments laid by the automatic submerged-arc process in 3/4-in-thick A36 plates were tested in pulsating tension and complete reversal. Stress relief showed no significant effect in complete reversal but did show a slightly detrimental effect in pulsating tension. Removal of the butt-weld reinforcement by grinding increased the fatigue life by a factor of 4 to 5. Little difference in fatigue resistance was observed between full and partial penetration longitudinal fillet welds. Analysis of Covariance permitted conclusions to be made as to the significance of treatment effects with assignable risks.
"Some Significant Parameters in the Fatigue Properties of Weld Joints," Welding Journal, v. 34, May 1969, pp 213-220.