Accession Number : AD0455918


Title :   EVALUATION OF THE LYON, INC. FORTY INCH DIAMETER ROCKET MOTOR CASE FABRICATED BY THE HOT CUP-COLD DRAW PROCESS.


Descriptive Note : Phase rept.,


Corporate Author : THIOKOL CHEMICAL CORP HUNTSVILLE AL


Personal Author(s) : Daigle, David L


Report Date : 29 Jan 1965


Pagination or Media Count : 1


Abstract : As part of an Army Material Research Agency program to evaluate candidate rocket motor cases for future Army Missile systems, an evaluation was performed of a motor case. The case was made from D6AC steel by a hot cup-cold draw process and conformed generally to the Pershing second stage motor case configuration. After dimensional and radiographic inspections, the case was subjected to a hydrostatic proof pressurization test at -65 F. a hydrodynamic pressurization test at -65 F, and a hydrostatic burst pressurization test at -65 F. The case performance under the low temperature pressurization tests was entirely satisfactory. The case failed in a ductile manner at a biaxial strength level of 274,000 psi, demonstrating that a large motor case possessing high strength and good elongation could be fabricated by the hot cup-cold draw process. The performance of the Lyon case was compared to the performance of two other Pershing second stage motor cases manufactured with D6AC steel. Based on the comparison, it appears that the performance of the Lyon case under pressurization differs little from the performance of the second stage Pershing cases presently being manufactured. (Author)


Descriptors :   *ROCKET ENGINE CASES , MATERIAL FORMING , STEEL , CRYOGENICS , HOT WORKING , COLD WORKING , DRAWING(FORMING) , TEST METHODS , DUCTILITY


Distribution Statement : APPROVED FOR PUBLIC RELEASE