Arc-cast Molybdenum-and Tungsten-base Alloys (1960-1961).

Arc-cast Molybdenum-and Tungsten-base Alloys (1960-1961). PDF

Author: M. SEMCHYSHEN

Publisher:

Published: 1962

Total Pages: 1

ISBN-13:

DOWNLOAD EBOOK →

The progress of work aimed at explaining the strengthening mechanisms operative in several molybdenum-base alloys is described. The optimum carbon contents for conventionally processed molybdenum-base alloys containing titanium, hafnium, zirconium, and titanium + zirconium are defined. The possibilities of increasing the strengths and reducing the optimum carbon content of these materials through solution and aging heat treatments are discussed. Attempts to prepare wrought sections of molybdenum-base alloys containing nominally 10% Cb and/or 10% Ta were only marginally successful owing to difficulties encountered in working the vacuumarc-cast ingots. A series of experiments is described wherein various melting and deoxidation practices are evaluated in connection with the 50% Mo-50% W alloy. Alloys based on tungsten or on various molybdenum-tungsten ratios have received considerable attention. Considerable difficulty was encountered in converting certain of the alloys of this type to bar stock. Outstanding elevated-temperature tensile and stressrupture properties are reported for a number of the compositions that were successfully converted to wrought stock. (Author).

Technology of Molybdenum and Its Alloys: Proceedings of a Symposium Held at Rackham Memorial Building, Engineering Society of Detroit, September 18-19, 1956

Technology of Molybdenum and Its Alloys: Proceedings of a Symposium Held at Rackham Memorial Building, Engineering Society of Detroit, September 18-19, 1956 PDF

Author: OFFICE OF NAVAL RESEARCH ARLINGTON VA.

Publisher:

Published: 1956

Total Pages: 20

ISBN-13:

DOWNLOAD EBOOK →

Contents: Session I -- Molybdenum as a Structural Material - The Potential and Future of Molybdenum and Its Alloys, Properties and Applications of Commercial Molybdenum and Molybdenum Alloys; Session II -- Preparation and Fabrication of Molybdenum and its Alloys - Consolidation of Molybdenum by Powder Metallurgy Practice, Arc - Melting Molybdenum, Working of Molybdenum and Its Alloys, Joining of Molybdenum and its Alloys; European Developments on Molybdenum - Vacuum-Sintered and Vacuum-Cast Molybdenum Alloys, Molybdenum Research and Development in Great Britain; Session III -- Metallurgy of Molybdenum and Molybdenum-Base Alloys - The Ductile-to-Brittle Transition in Molybdenum, The Influence of Carbon, Oxygen, and Nitrogen on the Ductility of Molybdenum, Development and Properties of Arc-Cast Molybdenum Alloys, Powder-Metallurgy Molybdenum-Base Alloys; Session IV -- Molybdenum Alloys for Gas Turbine Applications - Design Considerations and Engine Testing of Molybdenum for Aviation Gas Turbines, The Protection of Molybdenum Against High-Temperature Oxidation, Forging of Molybdenum-Alloy Turbine Buckets, Investigation of the Effects of Hot-Cold Work on the Properties of Molybdenum Alloys.

Arc-cast Molybdenum-base Alloys (1962-1964).

Arc-cast Molybdenum-base Alloys (1962-1964). PDF

Author: M. SEMCHYSHEN

Publisher:

Published: 1964

Total Pages: 125

ISBN-13:

DOWNLOAD EBOOK →

The influence of in-process solution and solution and aging treatments on the properties of several molybdenum-base alloys is described. Alloys of molybdenum with titanium and/or zirconium were processed to bar stock by extrusion and rolling procedures. Extruded bars were prepared for rolling to final size either by heating to the minimum recrystallization temperature or by the application of optimum solution or solution and aging treatments. The latter procedures resulted in significantly higher recrystallization temperatures and tensile strengths than the procedure involving recrystallization prior to rolling. The high elevated temperature strengths obtained for the molybdenum-base alloys studied resulted from a critically dispersed carbide phase. A limited amount of work indicated that a dispersion hardenable molybdenum-beryllium alloy could be worked by extrusion. Room temperature hardnesses approaching 500 DPH were developed by the application of the proper solution and aging treatments to the extruded molybdenum-beryllium alloy. (Author).

Lanterna Rally - Theme by Grace Themes