METASTABLE AUSTENITIC FORMING OF HIGH STRENGTH PRESSURE VESSELS
Semiannual interim technical progress rept. no. 2, 1 Sep 1962-30 Mar 1963
AVCO LYCOMING DIV STRATFORD CT
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Three selected alloys Type H-11 tool steel, AM 355 semiaustenitic stainless steel, and 18NiCoMo 300 maraging steel, were fabricated into biaxial pressure vessel test specimens. For the fabrication of the biaxial pressure vessel test specimens, designed experiments were utilized to evaluate a variety of processing and heat treat variables. The fabricated pressure vessels i.e. tubes were tested to failure in a hydrostatic test facility and evaluated for selection of an optimum material and associated fabrication process for a high performance, integral rocket motor case. Based on these studies the 18NiCoMo 300 maraging steel and a specific processing schedule were selected for Phase II and III evaluation. An intermediate size cylindrical test specimen and an integral subscale rocket motor case were designed for Phase II investigation of optimized fabrication techniques for the manufacture of an integral motor case from 18NiCoMo 300 material.
- Rocket Engines