Feasibility Study of Columbium Alloy Castings
AVCO LYCOMING DIV STRATFORD CT
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The objective of the program was to determine the feasibility of investment casting columbium alloys, namely, B-66 and C-3015. The REMET molding process, patented by REM Metals, Inc., Albany, Oregon, was used for the entire casting effort. Multiple test specimens were fused silicide coated and subjected to stress-rupture, tensile, ballistic impact, and environmental testing. At 2200F, the rupture strength of the cast alloys is much greater than the wrought form. Tensile strength and ductility of the alloys were unacceptable low for engineering applications. Silicide coatings showed visible signs of distress after 120 hours of testing.
- Metallurgy and Metallography
- Fabrication Metallurgy