FEASIBILITY OF TITANIUM FOR WELDED MISSILES
A study was made of the feasibility of welded titanium sheet for missile applications. Evaluation was based primarily on short-time elevated-temperature tensile properties and a notch-tensile-impact test for notch sensitivity. Three alloy types were investigated; viz., Ti--4A1--2V complex (1Mo--1Cr --1Sn), Ti-- 6Al--4V, and Ti--5Al--2 1/2Sn. With the exception of a few tests with unalloyed consumable electrode, welding was evaluated using the inert-gas-shielded tungsten- arc process with Ti--6A1--4V filler wire. Tensile properties were considered satisfactory with the exception of low ductility in the materials which had been converted from ingot to sheet on an experimental basis. Although all materials suffered loss of ductility after welding (with Ti--5Al-2 1/2Sn least affected), 100% tensile joint efficiencies were realized. Notch sensitivlty as indicated by notch-tensileimpact was indicated to be a problem, partlcularly after welding. Marked variations in notch sensitivity from heat-to-heat of a given composition type were noted. (auth)
- Research Organization:
- Watertown Arsenal Lab., Mass.
- NSA Number:
- NSA-12-015546
- OSTI ID:
- 4323652
- Report Number(s):
- WAL-TR-401/301
- Country of Publication:
- United States
- Language:
- English
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