FRACTURE OF METALS.
Abstract
Delayed failure is shown to occur with highstrength metals wetted by certain embrittling liquid metals. Dispersion-strengthened and coldworked metals are prone to delayed failure but soft, annealed metals are not. Cracking during the period of sustained loading can only be detected in the last few minutes before failure. A mechanism is proposed based on stress-accelerated intergranular penetration. Thus, failure time depends on both stress and temperature. Below a certain stress (endurance limit), temperature alone is inadequate, and failure does not occur. Certain preconditioning anneals retard and suppress delayed failure. A method is described for measuring the fracture energy of polycrystalline metals in the presence of a low-melting liquid metal. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 1964
- Accession Number
- AD0435021
Entities
People
- W. Rostoker
Organizations
- IIT Research Institute