Accession Number:

ADA355065

Title:

Hot Explosive Consolidation of Molybdenum-Titanium and Tungsten-Titanium Alloys

Descriptive Note:

Final rept. Jan 93-Dec 95

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Kecskes, Laszlo J.

Report Date:

1998-10-01

Pagination or Media Count:

77.0

Abstract:

A novel hot explosive compaction HEC technique has been applied to molybdenum Mo- and tungsten W-based titanium Ti alloys. The constituent precursor powders of the alloy billet were surrounded by an exothermic mixture, which, when ignited, released a large amount of heat via a self-propagating high-temperature synthesis SHS reaction. Heat from the SHS reaction diffused into the precursor powder bed, causing the interior temperature to rise above 1,500 deg C. When the powder bed became isothermal, it was consolidated to high density by pressure waves generated by the detonation of an explosive. The amount of explosive charge and the molar ratio of exothermic mixture to sample were adjusted to produce full-density molybdenum-titanium Mo-Ti and tungsten-titanium W-Ti alloys. The billets were sectioned and examined with scanning electron microscopy SEM, energy dispersive x-ray spectroscopy EDS, x-ray diffraction analysis XRD, and microhardness measurements. In context of the fabrication process, the similarities and differences of the resultant product microstructures are discussed.

Descriptors:

• *EXPLOSIVE CHARGES
• *MOLYBDENUM
• *TUNGSTEN
• *TITANIUM ALLOYS
• *REFRACTORY METAL ALLOYS
• SCANNING ELECTRON MICROSCOPES
• MICROSTRUCTURE
• ARMY RESEARCH
• POWDERS
• PRECURSORS
• HIGH TEMPERATURE
• X RAY DIFFRACTION
• FABRICATION
• EXPLOSIVES
• MIXTURES
• BILLETS(MATERIALS)
• HIGH DENSITY
• PRESSURE
• X RAY SPECTROSCOPY
• EXOTHERMIC REACTIONS
• DIFFRACTION ANALYSIS
• DISPERSIONS
• COMPACTING
• MECHANICAL WAVES
• MICROHARDNESS

Subject Categories:

• Inorganic Chemistry
• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE