Title

Physical Metallurgy Of Tungsten And Tungsten Base Alloys

Description

The tensile properties of polycrystalline tungsten were investigated. Ductility decreased between 2000°F and 4000°F, and it was found that annealing temperature has a greater effect on the D.-B. transition temperature than does grain size.Single crystals with a [100] orientation were grown by electron beam floating zone melting. The tensile deformation behavior of these crystals was studied from -196°C to 800°C. Internal friction measurements were made on single crystals between 20°C and 600°C and it was attempted to correlate damping peaks found at about 300°C and 475°C with interstitial effects, carbon dosing experiments, and yield point phenomena. Single crystals were worked by rolling and their recrystallization response was investigated as a function of cold work and working temperature. Twin morphology was thoroughly studied.Binary solid solution alloy single crystals of W-Ta were produced by electron beam floating zone melting from compacted ingots. Alloy single crystals containing .25% and 4% tantalum were worked and the recrystallization response was determined to be 400°C to 600°C higher than that of worked pure tungsten single crystals.The tensile strength of sintered and swaged W-TaC alloys was determine at 3000°F and 3500°F as a function of alloy composition (0.1-1%). Also measured at 3000°F and 3500°F were the tensile strengths of the systems W-2%ThO2 and W-.5% HfO2..

Date

1962

Index Abstract

Contrails and DTIC condensed

Photo Quality

Complete

Report Number

WADD TR 60-37 Part III

Creator

Sell, Heinz G.

Keith, George H.

Koo, Ronald C.

Schnitzel, Randolph H.

Corth, Richard

Corporate Author

Westinghouse Electric Corp Bloomfield N J

Laboratory

Directorate of Materials and Processes

Extent

220

Identifier

AD0293841

AD0293841

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-6933

DoD Task

735101

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Date Modified

Scanned by request 2/15/2017 submitted by General Electric Healthcare (Other Industry - Domestic)

Report Availability

Full text available

DoD Project

7351 - Metallic Materials

Abstract

The tensile properties of polycrystalline tungsten were investigated. Ductility decreased between 2000°F and 4000°F, and it was found that annealing temperature has a greater effect on the D.-B. transition temperature than does grain size.Single crystals with a [100] orientation were grown by electron beam floating zone melting. The tensile deformation behavior of these crystals was studied from -196°C to 800°C. Internal friction measurements were made on single crystals between 20°C and 600°C and it was attempted to correlate damping peaks found at about 300°C and 475°C with interstitial effects, carbon dosing experiments, and yield point phenomena. Single crystals were worked by rolling and their recrystallization response was investigated as a function of cold work and working temperature. Twin morphology was thoroughly studied. Binary solid solution alloy single crystals of W-Ta were produced by electron beam floating zone melting from compacted ingots. Alloy single crystals containing .25% and 4% tantalum were worked and the recrystallization response was determined to be 400°C to 600°C higher than that of worked pure tungsten single crystals.The tensile strength of sintered and swaged W-TaC alloys was determine at 3000°F and 3500°F as a function of alloy composition (0.1-1%). Also measured at 3000°F and 3500°F were the tensile strengths of the systems W-2%ThO2 and W-.5% HfO2..

Distribution Conflict

No

Date Issued

1962-11

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource (xv, 202 pages) : ill.

Subject

Powder Alloys

Powder Metals

Tungsten

Carbides

Crystals

Displacement Reactions

Grain Structures (Metallurgy)

Growth (Physiology)

Hafnium Alloys

Hafnium Compounds

Heat Treatment

High Temperature

Mechanical Properties

Metal Crystals

Oxides

Physical Properties

Powder Metallurgy

Processing

Tantalum Alloys

Tantalum Compounds

Tensile Properties

Thorium Alloys

Thorium Compounds

Transition Temperature

Tungsten Alloys

Zone Melting

Publisher

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