Fracture in a Tensile Specimen
ARMY MATERIALS RESEARCH AGENCY WATERTOWN MA
Pagination or Media Count:
There appears to have been little attempt to study the stress or strain conditions under which internal fracture starts andor propagates in the neck of a tensile specimen. Using a continuous ultrasonic searching technique, this incipient internal fracturing has been investigated in a variety of low strength ductile metals copper and steel. Voids of approximately 0.001 inch in size have been signalled ultrasonically and confirmed metallographically. This paper is centered around the evaluation of crack propagation with emphasis on void formation and coalescence and interpretation in terms of a non-adiabatic shear separation process.
- Metallurgy and Metallography