COMPRESSIVE DEFORMATION OF MAGNESIUM SINGLE CRYSTALS
Abstract
A study was made of the lattice rotation and creep behavior of compressively stressed Mg single crystals. Pure Mg single crystal rods, having the same orientation but different height-todiameter ratios, were deformed by compression. The resulting rotation of the crystalline lattice, measured by Laue back-reflection photographs, was accomplished by basal slip as the normal to the basal plane rotated toward the direction of the applied load. The rotation was dependent only on the orientation of the lattice with respect to the rod and the amount of deformation, in accordance with the model given by Schmid and Boas. (Plasticity of Crystals, Bath House, Picadilly W1: F. A. Hughes and Co., 1950.) Individual crystals were deformed discrete amounts and permitted to creep under stress relaxation. It was found that the creep contraction was proportional to the product of load and the cube root of the time, and was essentially independent of the previous history (Proc. Roy. Soc, Series A, 90:329-342, 1914) of the rod. This empirical relationship is similar to that of Andrade which applies to the primary stage of many tension creep tests. No tertiary stage was found in the compression tests for times up to 10,000 minutes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1961
- Accession Number
- AD0265638
Entities
People
- M. Schwartz
Organizations
- Frankford Arsenal