COMPARISON OF TENSILE PROPERTIES OF ZONE-REFINED NIOBIUM ROD AND SHEET

Journal Article · Sun Jul 01 04:00:00 EDT 1962 · J. Inst. Metals

OSTI ID:4815915

Rawson, J D.W.; McG Tegart, W J

Experiments were carried out to examine the effect of specimen preparation and geometry on the tensile properties of zone-refined Nb. A 0.3-in. dia Nb bar was zonerefined in 8 passes, swaged, and recrystallized at 1200 deg C, and part of the bar was swaged to 0.1-in. dia rods, while the rest was rolled to 0.021-in. thick sheets, both reductions being equal in area. The rods and sheets were then vacuum annealed at 1125 deg C; the resulting structures had small surface grains with very coarse grains in the interior. Stress/elongation tests show different lower yield stresses for rod and sheet (8,600 and 11,700 lb/in./ sup 2/, respectively) but similar ultimate tensile stresses (20,900 and 20,800 lb/ in./sup 2//). (D.L.C.)

• Research Organization: Univ. of Sheffield, Eng.
• NSA Number: NSA-16-027661
• OSTI ID: 4815915
• Journal Information: J. Inst. Metals, Journal Name: J. Inst. Metals Vol. Vol: 90
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANNEALING
CONFIGURATION
EXPANSION
GRAIN SIZE
HIGH TEMPERATURE
MACHINING
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM
PREPARATION
RECRYSTALLIZATION
REFINING
RODS
ROLLING
SHEETS
STRESSES
SURFACES
TENSILE PROPERTIES
THICKNESS
VACUUM