Crack nucleation in tungsten on crystallographic planes and on grain boundaries of twist misorientation

Journal Article · Sun May 01 04:00:00 EDT 1983 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(83)90392-7· OSTI ID:6232370

Liu, J M; Shen, B W

Cracks were induced in bicrystals of tungsten by an electrical discharge in paraffin oil at room temperature. The discharge led to local melting and evaporation of the metal, generating a crater solidification and subsequent shrinkage of the melted metal gave rise to high tensile stresses, promoting the formation of cracks along the cleavage planes 100 and 110 and grain boundaries of twist misorientation about the 100 and 110 lines. It is argued that the cracking of the high-angle boundaries may be due to the combined effects of favorable crack nucleation sites and reduction in surface-energy-dependent plastic work.

• Research Organization: New York State Univ., Stony Brook
• OSTI ID: 6232370
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 17; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
BICRYSTALS
CRACKS
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
CRYSTALS
ELECTRIC DISCHARGES
ELEMENTS
ENERGY
FREE ENERGY
GRAIN BOUNDARIES
METALS
MICROSTRUCTURE
PHYSICAL PROPERTIES
POLYCRYSTALS
SURFACE ENERGY
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN