Author: Robert Isaac JaffeePublisher:
ISBN:
Category : Rockets (Aeronautics)
Languages : en
Pages : 34
Book Description
Fabrication of Tungsten for Solid-propellant Rocket Nozzles
Author: Robert Isaac JaffeePublisher:
ISBN:
Category : Rockets (Aeronautics)
Languages : en
Pages : 34
Book Description
Development of Manufacturing Methods for the Production of Infiltrated Tungsten Composite Rocket Nozzle Inserts
Author: T. SturialePublisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
This final report summarizes results obtained during a program which was initiated under Contract AF33(615( -2090 on 1 September 1964, and successfully completed by the Space Systems Division, Avco Corporation on 31 July 1966. Manufacturing methods were developed for producing infiltrated tungsten composite materials having uniform microstructures and controlled grain sizes, pore sizes and pore size distribution for use as rocket nozzle insert materials. An ultrasonic sound velocity measurement technique was developed to non-destructively monitor billet fabrication and insure a homogeneous product. Preliminary screening was conducted by subjecting infiltrated tungsten specimens to high enthalpy air plasma environments and analyzing thermal response data and erosion behavior. Selected tungsten matrix and infiltrant combinations were fabricated into operational sized rocket nozzle inserts and test fired at the Rocket Propulsion Laboratory, Edwards Air Force Base. Simultated rocket motor firings were conducted using both 5700 F and 6500 F solid propellants. Subsequent evaluation indicated that zinc infiltrated tungsten materials hold promise for use as rocket nozzle inserts up to 6500 F. (Author).
Manufacturing Development of Tungsten Alloys for Rocket Nozzles. Mid-year Report on Phase Ii
Author: A. E. LaMarchePublisher:
ISBN:
Category :
Languages : en
Pages : 2
Book Description
The vacuum arc skull casting of tungsten-molybdenum alloy rocket nozzles in thin configurations can be achieved. It is anticipated that modifications of the same techniques can be adapted to the casting of pure tungsten. The reclamation of the tungsten scrap generated in this development contract has been achieved with very promising results. The reclamation of the 50 tungsten - 50 molybdenum weight per cent solid solution alloy scrap has not, however, met with success. A definite relationship between the purity of the vacuum arc melting electrodes and the ability to vacuum arc melt and cast successfully has been established. The temperature of the tungsten arc has been calculated theoretically and confirmed in experimental melting to be in the order of 10,000 to 11,000F. In addition, the partition of power or the amount of power which is received by the cathode and the anode has been shown to be approximately seventeen times greater at the anode or bath than that received by the cathode or consumable electrode using D.C. straight polarity.
Scientific and Technical Aerospace Reports
Author: U.S. Government Research Reports
Author: Technical Report - Jet Propulsion Laboratory, California Institute of Technology
Author: Jet Propulsion Laboratory (U.S.)Publisher:
ISBN:
Category : Jet propulsion
Languages : en
Pages : 36
Book Description
Manufacturing Development of Tungsten Alloys for Rocket Nozzles. Technique III. Vacuum Arc Skull Casting
Author: WESTINGHOUSE ELECTRIC CORP BLAIRSVILLE PA.Publisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
The vacuum arc skull casting technique was evaluated as a method of producing W and W alloys for rocket nozzles. Bars of the 50 W- 50 Mo, 70 W-30 Mo, 90 W-10 Mo wt-% alloys and pure W in the pressed and sintered condition were vacuum arc melted and skull cast into graphite molds in a vacuum melting facility. Destructive testing of resultant parts was conducted to determine the hardness, soundness, contamination and grain size of the castings. The first pure W skull castings ever produced were made. The ability to vacuum arc melt and cast 60- to 70- lb pure W castings was established. The vacuum arc skull casting of W-Mo alloy rocket nozzles in thin configurations may be achieved. The temperature of the W arc was calculated theoretically and confirmed in experimental melting to be in the order of 8,000 to 11,000 F. (Author).
Mechanical and Physical Properties of Three Superalloys - MAR-M200, MAR-M200, MAR-302, and MAR-M322
Author: J. A. VanEchoPublisher:
ISBN:
Category : Cobalt alloys
Languages : en
Pages : 34
Book Description
Machining of Titanium Alloys
Author: C. T. OlofsonPublisher:
ISBN:
Category : Machining
Languages : en
Pages : 30
Book Description
The memorandum summarizes current knowledge concerning the machining of titanium alloys. The memorandum deals with the following conventional machining operations: milling, face milling, peripheral milling, turning, boring, drilling, tapping, and grinding. The last section of the memorandum deals with chemical milling operations.
Tungsten Research and Development Review
Author: J. L. RatliffPublisher:
ISBN:
Category : Research and development projects
Languages : en
Pages : 70
Book Description
Government-sponsored tungsten research and development efforts encompass a broad rage of technological activities. Typifying the extreme limits of efforts since January, 1960, studies have ranged from preparation of unalloyed metal to development of high-integrity fabricated shapes of tungsten-base materials. Nine major areas outline the broad over-all effort, and each is summarized within this report by brief technical discussions of 104 separate studies on 79 research programs. Included are preparation of metal, consolidation, primary and secondary working, joining, fabrication and performance of rocket nozzles, oxidation and other high-temperature reactions, protective coatings, properties, and physical metallurgy.