Abstract
The tensile creep fracture properties of coarse- and fine-grained dispersion-strengthened-cast aluminum (DSC-Al) with 25 vol pct of submicron alumina dispersoids are presented for temperatures between 335 °C and 500 °C and stresses between 30 and 100 MPa. The primary, secondary, and tertiary creep strains are analyzed in terms of the minimum creep rate, applied stress, and temperature. Good agreement with the original and the modified Monkman-Grant relationships is found for the failure time of DSC-Al and other aluminum materials reinforced with dispersoids or particulates. The origin of the Monkman-Grant relationships for these materials is discussed in terms of stress exponents, specific interfacial areas, and ratio of secondary strain to failure strain.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 829-838 |
| Number of pages | 10 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1999 |
Funding
This research was supported by the National Science Foundation under Grant No. DMR 9417636, Dr. Bruce McDonald, monitor. The authors also acknowledge Chesapeake Composite Corp. for supplying DSC materials.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys