Elevated-temperature Tensile Properties of Alloyed Tungsten Fiber Composites PDF Download
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Author: Donald W. Petrasek Publisher: ISBN: Category : Metals Languages : en Pages : 36
Book Description
The effects of selected alloying elements on the elevated temperature tensile properties of tungsten fiber reinforced composites were studied. Composites were made of copper, copper- 2 percent chromium and copper- 10 percent nickel reinforced with various volume percents of uniaxially oriented tungsten fibers. The composites were tested in tension at temperatures up to 1800 degrees F.A comparison of the elevated-temperature tensile properties of tungsten fiber - copper alloy composites, representing soluble systems, was made with tungsten fiber - copper composites, representing a mutually insoluble system. The effects of alloying on the elevated-temperature tensile properties of tungsten fiber reinforced composites was also studied. A linear relation existed at elevated temperatures between tensile strength and volume percent fiber content for all the systems investigated. The copper alloy composites were weaker in tension at high volume percent fiber contents than copper composites in which alloying with the fiber did not occur. The tensile strength of the alloyed tungsten fiber decreased with increasing penetration of the alloying element into the tungsten fiber.
Author: Donald W. Petrasek Publisher: ISBN: Category : Metals Languages : en Pages : 36
Book Description
The effects of selected alloying elements on the elevated temperature tensile properties of tungsten fiber reinforced composites were studied. Composites were made of copper, copper- 2 percent chromium and copper- 10 percent nickel reinforced with various volume percents of uniaxially oriented tungsten fibers. The composites were tested in tension at temperatures up to 1800 degrees F.A comparison of the elevated-temperature tensile properties of tungsten fiber - copper alloy composites, representing soluble systems, was made with tungsten fiber - copper composites, representing a mutually insoluble system. The effects of alloying on the elevated-temperature tensile properties of tungsten fiber reinforced composites was also studied. A linear relation existed at elevated temperatures between tensile strength and volume percent fiber content for all the systems investigated. The copper alloy composites were weaker in tension at high volume percent fiber contents than copper composites in which alloying with the fiber did not occur. The tensile strength of the alloyed tungsten fiber decreased with increasing penetration of the alloying element into the tungsten fiber.
Author: D. W. Petrasek Publisher: ISBN: Category : Composite metallurgy Languages : en Pages : 27
Book Description
The length to diameter ratio and orientation of the fibers in discontinuous fiber reinforced composites was correlated to their elevated temperature tensile properties. Composites were made of copper and copper - 2 per cent chromium alloy reinforced with tungsten fibers having various length to diameter ratios. The composites were tested in tension at 300, 900, and 1500 F. These results were then compared with continuous length fiber reinforced composites containing the same matrix materials and fiber contents. The fiber orientation in the composite was found to be extremely critical at elevated temperatures. Shear failures occurred for specimens tested at 1500 F in which the fibers were misaligned from the tensile axis by as small as 3 deg. Composites which failed in shear had significantly lower tensile strengths than did composites having fibers aligned parallel to the tensile axis of the specimen. Tensile strengths of discontinuous fiber reinforced composites in which the fibers were aligned parallel to the tensile axis were dependent upon the length to diameter ratio of the fibers in the composite. As the length to diameter ratio of the reinforcing fibers decreased, the tensile strengths of the composites decreased. Alloying the copper matrix with chromium increased the matrix shear strength which was beneficial even though the alloying element reacted with the fiber. Load transfer from the matrix to the fiber was dependent upon the shear strength of the matrix. The greater the shear strength, the higher the load transfer capabilities of the matrix. The tensile strength of copper - 2 per cent chromium matrix composites thus was higher than unalloyed copper matrix composites having the same fiber content and the same length to diameter ratio fibers.
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division Publisher: ISBN: Category : Aeronautics Languages : en Pages : 1440
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Publisher: ISBN: Category : Aeronautics Languages : en Pages : 258
Author: H. W. Rauch Publisher: Elsevier ISBN: 1483271641 Category : Technology & Engineering Languages : en Pages : 453
Book Description
Ceramic Fibers and Fibrous Composite Materials has a two-fold purpose. First, it supplements and updates the information on ceramic and graphite fibers and whiskers which was presented in Volume 1 of the Refractory Materials Monograph Series. Secondly it reviews the progress being made in fiber-reinforced materials which utilize these newer fibers as reinforcements. For this latter purpose, the properties of composites, the problems of fiber handling and alignment, the problems of fiber-matrix interaction, and the effects of fabrication processes on composite properties are discussed. In addition, a chapter on fiber and whisker testing is included.
Author: Donald W. Petrasek
Author: Donald W. Petrasek
Author: D. W. Petrasek
Author: Donald W. Pettrasek
Author: Donald W. Petrasek
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Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Author: H. W. Rauch