Accession Number : AD0904317

Title :   Holographic Inspection and Evaluation of Propulsion Materials.

Descriptive Note : Final rept. 15 Mar 71-15 Jun 72.

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CA

Personal Author(s) : Armour, William H. ; Bird, James O. ; King, Kenneth R.

Report Date : SEP 1972

Pagination or Media Count : 142

Abstract : The study of the residual stress behavior of pyrolytic graphite coated composites is reported. Both experimental and analytical studies were conducted. Means for reducing the high residual stresses were also studied. Thermal stress behavior of silicon carbide codeposited pyrolytic graphite composites is also reported. Both temperature and radial expansion measurements were made during heating in the electron beam thermal stress experiment. Significant progress was made in the NDT of pyrolytic graphite coated rocket nozzle inserts. Different types of flaws could be readily located using various loading techniques. The detection of flaws in adhesive-bonded reinforced plastics was not as easy as with the more rigid graphitic materials. (Author, modified-PL)

Descriptors :   (*COMPOSITE MATERIALS, ROCKET NOZZLES), (*PYROLYTIC GRAPHITE, COMPOSITE MATERIALS), COATINGS, SILICON CARBIDES, REFRACTORY MATERIALS, REFRACTORY COATINGS, THERMAL STRESSES, HIGH TEMPERATURE, GRAPHITE, SUBSTRATES, DEPOSITION, TEST METHODS, ELASTIC PROPERTIES, PHASE STUDIES, TENSILE PROPERTIES, CRACKS, PLASTIC PROPERTIES, NONDESTRUCTIVE TESTING, INTERFEROMETERS, ELECTRON MICROSCOPY, ELECTRON BEAMS, HEATING, DEFORMATION, DEFECTS(MATERIALS), BONDED JOINTS, ADHESIVES, TEST EQUIPMENT.

Subject Categories : Laminates and Composite Materials
      Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE