METALLURGICAL ANALYSIS OF ABLATED ALUMINUM ALLOY HEMISPHERES
Abstract
A metallurgical anal sis was performed on 3 Al alloy (356 T-6) hemispherical nose cones which were ablated in a hypersonic tunnel. The analysis consisted of macroscopic examination, metallography and hardness measurements of the cross-sectioned surfaces of the hemispheres. The results of the metallurgical tests were correlated with temperature data, and used to evolveA METHOD OF REVEALING THE HEAT ABSORPTION GRADIENT THROUGHOUT THE HEMISPHERES. Conclusions: Hardness gradient data correlate with temperature and heat absorption data. The hardness and macrostructure studies provide an additional method of observing results of heat absorption gradients. Ablation damage was due to removal of melted eutectic by the high-energy air stream. The hardness-macrostructure gradient studies can be applied to alloys other than aluminum for higher temperature range investigations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1962
- Accession Number
- AD0286445
Entities
People
- G.j. Fischer
- R. Maciag
Organizations
- New York University Tandon School of Engineering