Dispersion-Strengthened Metal Structural Development. Part III.
Abstract
The work conducted from October 1972 through 15 August 1973 in a research program to investigate structural utilization of oxidation-resistant dispersion-strengthened metals (DSM) is described. The program was initiated to assess the application of DSM in structures that will experience repeated service at elevated temperatures in the range of 1400 to 2400 F. The entire effort was divided into six phases to provide an orderly investigation in the areas of (1) structural design requirements, (2) material survey and evaluation, (3) structural design allowables, (4) structural test assembly design, (5) structural assembly evaluation through tests, and (6) evaluation of material changes caused by the cyclic tests. Results of Phase VI are described. Material samples were removed from various components of a full-scale DSM test assembly after completing 50 test cycles of programmed load and temperature profiles that simulated the ascent and reentry portions of a lifting reentry vehicle mission. Evaluations of material changes caused by the test cycles are presented. Changes in tensile strength and stress-rupture strength are reported, as well as metallurgical evaluations of microstructural changes in the Ni-20Cr-ThO2 material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1973
- Accession Number
- AD0913794
Entities
People
- D. H. Killpatrick
- R. Johnson Jr.