Accession Number:

AD0711930

Title:

FEASIBILITY STUDY OF COLUMBIUM ALLOY CASTINGS.

Descriptive Note:

Quarterly progress rept. no. 3, 1 Feb-30 Apr 70,

Corporate Author:

AVCO LYCOMING DIV STRATFORD CONN

Personal Author(s):

• Beauregard,R. J.
• Walters,J. J.

Report Date:

1970-08-01

Pagination or Media Count:

45.0

Abstract:

During the quarter, two pours of alloy B-66 were made into fluidity molds having two tungsten layers. One pour was made into an unheated mold, and one pour was made into a mold preheated to 1160 F. Preheating of the mold resulted in greatly improved fluidity with no serious contamination. Based on the eight B-66 fluidity castings produced so far in this program, two-layer molds preheated to 1400 F were selected as the optimum for the production of Phase 2 test specimens and vanes. One additional pour of alloy WC-3015 was made in a one-tungsten-layer fluidity mold preheated to 1300 F. No improvement in fluidity was seen compared with previous preheated two-layer molds. Based on the eight WC-3015 fluidity castings made in this program, two-layer molds preheated to 1400 F were selected as the optimum for Phase 2. Author

Descriptors:

• (*NIOBIUM ALLOYS
• *CASTINGS)
• (*CASTING
• NIOBIUM ALLOYS)
• FEASIBILITY STUDIES
• TURBINE PARTS
• MOLDINGS

Subject Categories:

• Metallurgy and Metallography
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE