The Influence of Impact Velocity on the Tensile Properties of Four Magnesium Alloys and 24S Aluminum Alloy
Abstract
This report presents the results of further investigations of the influence of impact velocity on the tensile properties of metals and alloys, Part I presents the results of tests on four magnesium alloys, namely, Dow Metal FS-1-HTA, J-1-HTA, M-HTA and 0-1-HTA. It is concluded that alloys M and O are susceptible to embrittlement by stress concentration. The energy per unit volume required to fracture these two alloys dynamically was about the same as statically when a fillet of 5 in. radius was used. The energy to fracture alloys F and J in specimens with 1/16 in. radius fillet is higher dynamically than statically. The critical velocity of each of the four alloys is greater than 200 ft/sec. Part II presents the results of static and dynamic tensile tests on a 24 aluminum alloy in the 'T' and annealed conditions. The tensile properties of this alloy in both structural conditions are larger dynamically than statically. As may be expected, the values of these properties are lower for the annealed alloy. The critical velocity is greater than 200 ft/sec for both structures. These results are compared with those of a 17ST aluminum alloy previously reported with the conclusion that in general there is no appreciable difference between the dynamic properties of the 17ST alloy and the 24ST alloy although the 17ST may be slightly superior.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 05, 1944
- Accession Number
- ADB280830
Entities
People
- D. S. Clark
- D. S. Wood
- P. E. Duwez
Organizations
- California Institute of Technology