DEFORMATION MODES OF ZIRCONIUM AT 77 K, 300 K, 575 K, and 1075 K

Technical Report · Sat Oct 01 04:00:00 EDT 1960

OSTI ID:4031397

Rapperport, E J; Hartley, C S

A study was made ofthe deformation processes active in zirconium crystals deformed at 77, 300, 575, and 1075 deg K. The specimens were large- grained samples of relatively high purity and wide orientation distribution. The only slip system observed at any of the temperatures was of the form (1010) STA1210! with a critical resolved shear stress of about 1.0 kg/mm/sup 2/ in tension at 77 deg K, 0.65 kg/mm/sup 2/ in compression at 300 deg K, 0.20 kg/mm2 in tension at 575 deg K, and 0.02 kg/mm/sup 2/ in tension at 1075 deg K. The slip planes were found by the usual two-trace techniques and the slip direction found from a detailed analysis of Laue spot asterism. The active twin planes were {1012}, {1121}, {1122}, and {1123}, with varying frequencies at the different test temperatures. The most active at all temperatures was {1121}, with {1122}, {1123}, and {1012} twins unobserved at 1075 deg K The absolute thicknesses of the twin families at each temperature were measured and compared with the twinning shears for the contributing families to yield deviations from the generalization that the twinning shear is inversely related to the twin breadth. (auth)

• Research Organization: Nuclear Metals, Inc., Concord, Mass.
• NSA Number: NSA-15-023948
• OSTI ID: 4031397
• Report Number(s): NMI-1243
• Country of Publication: United States
• Language: English

Related Subjects

CONFIGURATION
CRYSTALS
DEFORMATION
DISTRIBUTION
GRAIN SIZE
HIGH TEMPERATURE
IMPURITIES
LOW TEMPERATURE
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
PRESSURE
SAMPLING
SHEAR
SLIP
STRESSES
TEMPERATURE
TENSILE PROPERTIES
THICKNESS
VARIATIONS
ZIRCONIUM