EVALUATION OF ELECTRON BEAM WELDING FOR FABRICATION OF ULTRA HIGH STRENGTH STEEL ROCKET MOTOR CASES
Abstract
Tests were performed to qualify a special test bar design for obtaining strength data on sheet or plate welds under 2:1 biaxial loading conditions. The specimen was a flat tensile test bar into which identical grooves were milled on both sides of the test section, opposite one another, in a direction perpendicular to that of loading. Limits were established for groove dimensions which yielded conditions of substantially plane strain. Results of biaxial tensile tests performed on electron beam welds showed strengths that were of the order of 10% higher than those determined on the same welds using conventional test specimens. As a groove in the parent material will promote the strength about 10%, it was concluded the weld metal has the same biaxial strength as the parent material. Biaxial strengths of TIG welds appeared to be somewhat lower than those of electron beam welds. Failure with electron beam welds occurred frequently at a location fairly remote from the weld (1/4 in. away).
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 07, 1961
- Accession Number
- AD0256226
Entities
People
- C. M. Adams Jr.
Organizations
- Massachusetts Institute of Technology