Accession Number : AD0635027

Title :   DEVELOPMENT AND EVALUATION OF DIFFUSION BONDED LAMINATED SECTIONS.

Descriptive Note : Interim engineering rept. no. 1, 15 Mar-30 Jun 66,

Corporate Author : NORTH AMERICAN AVIATION INC LOS ANGELES CALIF

Personal Author(s) : Miskulin, Paul ; greenspan,Harold J. ; Brunken,Ronald D.

Report Date : 30 JUN 1966

Pagination or Media Count : 52

Abstract : Efforts in the development of press bonding of Ti-6Al-6V-2Sn during this period consisted of constructing an 8 by 8-inch platen press and testing the functioning of the equipment. Minor adjustments in pressure control were required to achieve precise bonding pressures. Evaluation of bonding parameters consisted of producing 12 3 by 3 by 3-inch billets. Bonding temperatures varied, in addition to percent billet deformation and hold time at bonding temperatures. Several tooling concepts were tested to examine the need for internal and external tooling in making laminte sections. These studies revealed the need for internal tooling support. Metallographic examination of bonded laminates showed that well-bonded joints could be obtained, but billet deformations in excess of 20 percent were required to achieve uniformly high ductility throughout the billet. Appropriate bonding temperatures are between 1600F and 1650F. Studies of sheet finish were conducted. A 2D finish was required to produce soundly bonded laminates. Grit blasted finxshes produced bonded interfaces with pronounced voids. Experiments were conducted on reducing the amount of edge bulging. Boron nitride was found to be a promising material to reduce friction between the retort and billet. (Author)

Descriptors :   (*AIRFRAMES, LAMINATES), (*DIFFUSION BONDING, *TITANIUM ALLOYS), (*LAMINATES, DIFFUSION BONDING), ALUMINUM ALLOYS, VANADIUM ALLOYS, TIN ALLOYS, PRESSES(MACHINERY), SHEETS, DUCTILITY, SURFACE PROPERTIES

Subject Categories : Aircraft
      Laminates and Composite Materials
      Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE