Title

Tungsten Extrusion Development Program

Date

1963

Index Abstract

Not Available

Photo Quality

Complete

Report Number

ML TDR 64-217

Creator

Riesen, A. E.

Wang, C. T.

Worcester, S. A.

Corporate Author

Wah Chang Corp Albany Oreg

Laboratory

Materials Laboratory

Date Issued

1963-06-27

Extent

160

Identifier

AD0605195

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(600)-42395

DoD Project

7793

DoD Task

None Given

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Date Modified

Scanned by request 2/6/2006 submitted by a Private Citizen (No Affiliation Known)

Abstract

Procedures were developed for preparation of tungsten-3 percent molybdenum extrusion billets by arc casting and by pressing and sintering. Round extrusions were made to evaluate die lubrication and die coatings in temperatures ranging from 3200F to 4000F at reduction ratios as high as 17:1. Efforts to obtain wrought extrusion billets by extruding large cast ingots at 2300F and 2.6:1 were not successful because longitudinal cracking developed in the extrusion. Efforts to meet program target dimensional and surface requirements with arc cast tungsten-3 percent molybdenum were unsuccessful. However, extruded tungsten 'T' sections up to 138 inches long having surface finishes better than 100 RMS and dimensional run-out within .010 inch were successfully produced from pressed and sintered starting material. The extrusion conditions necessary to achieve the program target dimensions resulted in a hot-worked microstructure which has a high ductile-brittle transition temperature and relatively low strength. Because of the undesirable microstructure achieved and the lack of requirement for tungsten extrusions of the target configuration, the program was terminated at the end of the Phase III effort.

Report Availability

Full text available

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource