Basic Studies on Dispersion Hardening
Abstract
The addition, to a metallic matrix, of a suitably dispersed second phase is one of the most potent methods of increasing the strength of this matrix. In order to obtain a better understanding of the strengthening due to the presence of the second phase, extensive studies into dispersion strengthened alloys have been carried out over a number of years. Initially, these studies centered on the relationship of the observed mechanical properties to the size, shape and distribution of the second phase particles and on the mechanism of interaction of moving dislocations with these particles. Recently, however, strengthening effects which are not directly attributable to the second phase morphology have been observed. As an example of such an effect is the behavior of TD nickel when it is alternately cold worked and annealed. It is found that annealing cold worked TD nickel at temperatures which would be expected to give complete recovery of the matrix (e.g., l300c) results in an increase in tensile strength (at 1100c) as compared with the unworked alloy. No change in the properties of the second phase is observed and it is therefore concluded that some change in the behavior of the matrix must have occurred.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- ADA397217
Entities
People
- L. J. Bonis
- Robert Grierson