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Fabrication and evaluation of enhanced diffusion bonded titanium honeycomb core sandwich panels with titanium aluminide face sheetsA joining process was developed for fabricating lightweight, high temperature sandwich panels for aerospace applications using Ti-14Al-21Nb face sheets and Ti-3Al-2.5V honeycomb core. The process, termed Enhanced Diffusion Bonding (EDB), relies on the formation of a eutectic liquid through solid-state diffusion at elevated temperatures and isothermal solidification to produce joints in thin-gage titanium and titanium aluminide structural components. A technique employing a maskant on the honeycomb core was developed which permitted electroplating a controlled amount of EDB material only on the edges of the honeycomb core in order to minimize the structural weight and metallurgical interaction effects. Metallurgical analyses were conducted to determine the interaction effects between the EDB materials and the constituents of the sandwich structure following EDB processing. The initial mechanical evaluation was conducted with butt joint specimens tested at temperatures from 1400 - 1700 F. Further mechanical evaluation was conducted with EDB sandwich specimens using flatwise tension tests at temperatures from 70 - 1100 F and edgewise compression tests at ambient temperature.
Document ID
19900057153
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hoffmann, E. K.
(NASA Langley Research Center Hampton, VA, United States)
Bird, R. K.
(NASA Langley Research Center Hampton, VA, United States)
Bales, T. T.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Structural Mechanics
Meeting Information
Meeting: Light-Weight Alloys for Aerospace Applications
Location: Las Vegas, NV
Country: United States
Start Date: February 28, 1989
End Date: March 2, 1989
Sponsors: Minerals, Metals and Materials Society
Accession Number
90A44208
Distribution Limits
Public
Copyright
Other

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