Accession Number : ADA469178


Title :   Titanium Brazing for Structures and Survivability


Descriptive Note : Rept. Aug 2004-May 2005


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE


Personal Author(s) : Doherty, Kevin J ; Tice, Jason R ; Szewczyk, Steven T ; Glide, Gary A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a469178.pdf


Report Date : May 2007


Pagination or Media Count : 12


Abstract : Titanium is a candidate as a structural material for all new tactical and armored ground vehicles, because of its high strength-to-weight ratio, excellent corrosion resistance, and inherent ballistic resistance. However, titanium as a structural material is much less mature than both steel and aluminum alloys, especially in the area of joining. While welding is the typical joining method for titanium, vacuum brazing is an option in areas that are difficult to access for welding as well as areas near other nonmetallic materials, such as ceramics. This work focuses on vacuum brazing of titanium (both Ti-6Al-4V and commercially pure titanium) and the effect of processing changes (alloy, temperature, pressure), including post-braze hot isostatic pressing, on mechanical properties and microstructure. This study will examine the joining of both plate materials as well as lightweight, periodic pyramidal core structures. Shear and tensile testing is performed to determine the strength/ductility relationship to the various processing routes. Microscopy (optical and SEM) is employed to quantify the degree of bonding and to examine the microstructural changes, both within the base materials and at the bond line, associated with the process variations.


Descriptors :   *COMPOSITE STRUCTURES , *TITANIUM ALLOYS , *BRAZING , MECHANICAL PROPERTIES , MICROSTRUCTURE , CORES , ALUMINUM ALLOYS , SURVIVABILITY , MODIFICATION , NONMETALS , PURITY , TENSILE TESTERS , BALLISTICS , STRENGTH WEIGHT RATIO , DUCTILITY , JOINING , ROUTING , BONDING , STRENGTH(GENERAL) , CORROSION RESISTANCE , PYRAMIDS(GEOMETRY) , WELDING , CONSTRUCTION MATERIALS , CERAMIC MATERIALS , MICROSCOPY , MATERIALS , PROCESSING , RESISTANCE , STRUCTURES , VACUUM


Subject Categories : Metallurgy and Metallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE