EFFECT OF VACUUM ON THE MECHANICAL BEHAVIOR OF METALS.
Abstract
Effects of vacuum on the various mechanical properties of aluminum have been studied as a function of pressure, strain rate, crystallographic orientation, strain, specimen size and grain size. The results obtained from a series of creep, fatigue and tensile tests indicate that these parameters are intimately related to the magnitude of the effects observed in vacuum. Experimental results obtained in vacuum for the fatigue life, the coefficient of work-hardening, the change in activation energy and the activation volume are presented. The tensile properties of pure alpha iron have also been studied in vacuum, and the experimental data are presented. A theoretical surface effect model based on the concept of the 'surface debris layer' is proposed to interpret all the phenomena observed in this investigation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0612022
Entities
People
- I. R. Kramer
Organizations
- Glenn L. Martin Company