STUDIES OF REFRACTORY ALLOY SHEET MATERIALS.
Abstract
Pilot lots of 0.05-in.-thick sheet were rolled from ingots of the following compositions: (1) Mo + 1.59% Cb + 0.52% Ti + 0.21% Zr + 0.068% C, (2) Mo + 1.30% Ti + 0.35% Zr + 0.093% C, (3) W + 3.10% Mo + 0.04% Zr + 0.001% C. The use of solution or solution and aging thermal treatments at the extruded billet stage (prior to rolling to sheet) markedly increased the recrystallization temperature and the elevated-temperature tensile and creep-rupture strengths of the two molybdenum-base alloys. Tensile strengths of 55,000 psi at 3000 F and 13,600 psi at 3500 F were observed for the tungsten-base alloy. The W-Mo-Zr alloy sheet exhibited higher strength:density ratios at 3000 F than any of the molybdenum-base alloys evaluated. Creep-rupture strengths of both molybdenum- and tungsten-base alloy sheet materials were affected by reactions between the specimen surfaces and the test atmosphere (<.0004 torr). The molybdenum-base alloys experienced measurable decarburization during tests at 2400 and 3000 F.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1964
- Accession Number
- AD0609815
Entities
People
- M. Semchyshen.
- Robert Q. Barr