EVOLUTION OF ULTRA-HIGH STRENGTH STEELS, AND RESEARCH ON MATERIALS AND VARIOUS NOVEL TECHNIQUES OF FABRICATION OF HIGH PERFORMANCE ROCKET MOTOR CASES
Progress rept. no. 39, 1-30 Jul 1961
CARNEGIE-MELLON UNIV PITTSBURGH PA MELLON INST OF SCIENCE
Pagination or Media Count:
Tensile tests on 0.0045-in.-diam Be wire indicate that the Be wire is about twice as strong as 6061-T-913 Al alloy wire. Two epoxy bonded Alfilament wound 10-in.-diam spheres are in progress. Fatigue studies on air- melted Rocoloy 270 indicate that austenitization temperatures above and below the optimum temperature reduce the endurance limit and fatigue life. Analyses of the mechanical properties of MX-2 hydrospun vessel were completed. The parent hydrospun material had better properties than the weld material in the circumferential direction but lower properties in the longitudinal direction. The use of ultrasonic vibrations to produce very fine microstructure in welds was demonstrated. No failures are reported of any specimens of MX-2 and Rocoloy 270 subjected to stress corrosion evaluation.
- Solid Propellant Rocket Engines
- Properties of Metals and Alloys