Effects of Variables in Welding Technique on the Strength of Direct-Current Metal-Arc-Welded Joints in Aircraft Steel. 1 - Static Tension and Bending Fatigue Tests of Joints in SAE 4130 Steel Sheet
Abstract
Arc-welded butt joints in 1/8-inch SAE 4130 steel sheet of aircraft quality, which were made under various conditions of welding and heat treatment, were tested to evaluate the effects of specific welding-technique factors on the strength of the joints. The results of the tensile tests indicated that crater blowholes, or crater cracks, produced by interrupting the weld, had the most pronounced influence on the transverse tensile strength of the butt-welded specimens; that position of welding had no significant effect on the tensile strength of any group of specimens; that preheating produced no increase in either the soundness or strength of the welds; and that welds made with alloy-steel electrodes were stronger than those made with plain-carbon-steel electrodes. It was found that the factor having the greatest influence on the plate-bending fatigue strength of the welded specimens was the external stress-raiser at the toe of welds in the reinforced specimens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1947
- Accession Number
- ADB804050
Entities
People
- C. B. Voldrich
- E. T. Armstrong
Organizations
- Battelle Memorial Institute