Electron Beam Welding of Annealed Tantalum Sheet
Abstract
Electron beam welding techniques were developed for joining 0.080-inch, high-purity annealed tantalum sheet. Maximum joint strength with minimum heat input was desired. In preliminary studies it was determined: (1) that weld penetration of the tantalum could be controlled within +/- 0.003 inch; and (2) that tensile and yield strength were slightly higher for the weld metal than for the parent material, although the elongation decreased from 40.5 to 23.5% due to recrystallization of the metal. Weld specimens were prepared with 0.020 x 0.020-inch step joints (which were easier to machine than the initially tested 0.010 x 0.010-inch step joints). The joint efficiency was 92% with only 75% penetration. Additionally, the low power requirements (1320 joules per inch) gave a maximum temperature of 300 deg C at the metal surface opposite the weld.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- ADA397554
Entities
People
- J. R. Mcdougal
- R. E. Vallee
Organizations
- Monsanto