Title

Investigation Of Welding Of Commercial Columbium Alloys

Date

1962

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

ASD TDR 62-292

Creator

Gerken, J. M.

Faulkner, J. M.

Corporate Author

Thompson Ramo Wooldridge Inc Los Angeles Calif

Laboratory

Directorate of Materials and Processes

Extent

149

Identifier

AD0282225

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-7796

DoD Project

7351 - Metallic Materials

DoD Task

735102

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Abstract

An investigation was made of the welding characteristics of three commercial columbium base alloys, FS82, D31, and F48. Tungsten inert gas, electron beam, spot, and flash butt welding methods were included in this investigation. The effect of the welding variables travel speed, shielding gas composition and purity, filler metal additions, preheat and post heat were studied. Thermal cycles were measured in the fusion zone and heat affected zone of TIG welds to help explain mechanical properties and microstructure on the basis of physical metallurgy of each alloy. The effect of welding on all alloys investigated was to increase the ductile to brittle transition temperature. This temperature was increased 200 F for FS82, 800 F for D31, and 500 to 800 F for F48 over that of the as-received wrought sheet. Of several post heat treatments investigated those most beneficial in lowering the transition temperature of welds were; 2000 F for 4 hours for FS82, 2100 F for 24 hours for D31, and 2500 F for 4 hours for F48. The electron beam welding process consistently produced more ductile welds than the TIG process.

The abstract for this report is either unavailable or has yet to be entered

Report Availability

Full text available

Date Issued

1962-05

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource