Accession Number : AD0284456

Title :   EVALUATION OF ELECTRON BEAM WELDING OF ALLOYED MOLYBDENUM SHEET

Corporate Author : MARQUARDT CORP VAN NUYS CALIF

Personal Author(s) : RABENSTEINE,A.S.

Report Date : 12 SEP 1962

Pagination or Media Count : 1

Abstract : An evaluation was made of the electron beam welding proce s as applied to the joining of alloyed molybdenum sheet. Both low voltage and high voltage welding equipment w re utilized. This enabled comparison of results to see if either type of equipment had distinct advantages. Welded test panels were evaluated radiographic lly, m tallographically and mechanically. The tensile proper ies at temper tur s up to 3200 F wer obtained for both the welded specime s and parent material. This investigation showed that molybdenum base sheet materials can be successfully joined by electron beam welding. The specific advantages of this process are as follows: (1) preheat of material to prevent weld cracking is not mandatory; (2) relativ ly fine grained, narrow welds can be made; (3) ductility of the weld me al is evidence that contamination is minimized; and (4) weld porosity in sintered molybdenum sheet is significantly reduced. The test data reported show that weldi g causes a reduction in strength through removal of cold work in the lower temperature region (up to 2400 F). Above 2400 F, the material recrystallizes and weld stre gths and parent metal stre gths are equivalent. (Aut or)

Descriptors :   *ELECTRON BEAMS, *MOLYBDENUM ALLOYS, *SHEETS, *WELDING, DEFORMATION, GRAIN STRUCTURES (METALLURGY), MECHANICAL PROPERTIES, METALLURGICAL ANALYSIS, POROSITY, RADIOGRAPHY, RESISTANCE (ELECTRICAL), STRESSES, TENSILE PROPERTIES, WELDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE