Title

Research On Workable Refractory Alloys Of Tungsten, Tantalum, Molybdenum, And Columbium

Date

1963

Index Abstract

Contrails and DTIC condensed

Photo Quality

Incomplete

Report Number

WADD TR 61-134 Part 2

Creator

Westgren, R. C.

Thompson, V. R.

Petersen, V. C.

Corporate Author

Crucible Steel Company Of America

Laboratory

Directorate of Materials and Processes

Extent

107

Identifier

AD0407690

AD0407690

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-8135

DoD Task

735101

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available by request

DoD Project

7351 - Metallic Materials

Date Issued

1963-04

Abstract

Under a previous contract, the W-Ta-Mo-Cb alloy system was investigated, and several tungsten- and tantalum-rich alloys were developed and evaluated in the form of extruded bars. Many of these alloys exhibited very high strengths at 3000°F; in fact, the tensile strengths of some alloys were in excess of 60,000 psi. The present work was a continuation of this effort and was aimed at producing and evaluating alloys from the W-Ta-Mo-Cb system in the form of sheet (Phase I) and increasing its high-temperature strength by the formation of dispersed carbides (Phase II).

For Phase I, small cylindrical ingots of six selected alloys and unalloyed tungsten were consumably vacuum arc-melted by a multiple electrode technique and successfully extruded to sheet bars. Two alloys and unalloyed tungsten were rolled to sheet and recrystallization temperatures, bend transition temperatures, and high- temperature tensile properties were determined. The other four alloys could not be rolled to sheet by the techniques attempted in this program.

Experiments under Phase II resulted in the development of a successful technique for consumably vacuum arc melting 88W-12Cb alloys that contained small amounts of vanadium, zirconium, and carbon. These alloys showed 3500°F tensile strengths at 49,000 to 57,000 psi--this constituted a twofold increase in strength above that of the base solid solution composition.

Subject

Refractory Metal Alloys

Metalworking

Extrusion

Melting

Tungsten

Carbon Alloys

Vanadium Alloys

Zirconium Alloys

Tantalum Alloys

Tungsten Alloys

Rolling (Metallurgy)

Molybdenum Alloys

Niobium Alloys

Publisher

Wright-Patterson Air Force Base, OH : Directorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command

Distribution Conflict

No

Type

report

Provenance

Lockheed Martin Missiles & Fire Control