Accession Number:

ADA399871

Title:

Influence of Boron Additions on Physical and Mechanical Properties of Arc-Melted Tungsten and Tungsten-1 Percent Tantalum Alloy

Descriptive Note:

Technical note

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s):

• Raffo, Peter L.
• Klopp, William D.

Report Date:

1966-02-01

Pagination or Media Count:

23.0

Abstract:

The effects of boron additions on the physical and mechanical properties of arc-melted tungsten and a tungsten -1 percent tantalum alloy were investigated. Boron additions significantly refined the arc-melted grain size of tungsten. The 1-hour recrystallization temperature was initially increased by small boron additions approx. 0.01 atomic percent boron, after which it decreased continuously with increasing boron content. High-temperature tensile tests showed that the boron additions produced an initial rapid rise in strength followed by a leveling off of the strength-composition curve. Boron in solid solution was postulated to be the cause of the rapid increase in strength.

Descriptors:

• *BORON
• *TUNGSTEN ALLOYS
• ANNEALING
• MECHANICAL PROPERTIES
• TENSILE STRENGTH
• PHYSICAL PROPERTIES
• HIGH TEMPERATURE
• RECRYSTALLIZATION
• CREEP STRENGTH
• TANTALUM ALLOYS
• ARC MELTING

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE