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  • 1970-1974  (4)
  • 1
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    Unknown
    Electroslag welding of 75 to 100 ton ingots (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A new process for joining large cross-section components by electroslag welding is reported that utilizes four consumable electrodes made of the same material as the ingots. A bifilar current supply provides the very large energy input to the consumerable nozzle for heating the ingots being welded. This process produces better and more homogeneous mechanical properties, better chemical composition and structure uniformity, and requires no prior or simultaneous heating of ingots during welding. It is now possible to obtain medium size ingots and join as many as are required to produce 500 or 600 ton ingots.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA. Langley Res. Center Proc. of the Symp. on Welding, Bonding, and Fastening; 16 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Development of high temperature materials for solid propellant rocket nozzle applications (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Evaluation of tantalum carbide-tungsten fiber composites has been completed as far as weight percent carbon additions and weight percent additions of tungsten fiber. Extensive studies were undertaken concerning Young's Modulus and fracture strength of this material. Also, in-depth analysis of the embrittling effects of the extra carbon additions on the tungsten fibers has been completed. The complete fabrication procedure for the tantalum carbide-tungsten fiber composites with extra carbon additions is given. Microprobe and metallographic studies showed the effect of extra carbon on the tungsten fibers, and evaluation of the thermal shock parameter fracture strength/Young's Modulus is included.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-CR-140666 , QPR-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Development of high temperature materials for solid propellant rocket nozzle applications (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Aspects of the development and characteristics of thermal shock resistant hafnia ceramic material for use in solid propellant rocket nozzles are presented. The investigation of thermal shock resistance factors for hafnia based composites, and the preparation and analysis of a model of elastic materials containing more than one crack are reported.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-138804 , QPR-12
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Controlled glass bead peening Patent (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Method and apparatus for inducing compressive stresses in pressure vessel to prevent stress corrosion
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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