Dissertation > Excellent graduate degree dissertation topics show

Mechanical Behavior of Tungsten Fiber Reinforced Zr-based Bulk Metallic Glass Composite

Author: WangHaiFeng
Tutor: LiWen
School: Shenyang University of Technology
Course: Materials Science
Keywords: W the silk / Zr -based amorphous composite Mechanical Properties Shear zone Deformation behavior Fractography
CLC: TG139.8
Type: Master's thesis
Year: 2010
Downloads: 33
Quote: 0
Read: Download Dissertation

Abstract


Bulk amorphous alloys have excellent performance and more and more people's attention. This paper focuses on the mechanical properties of Zr-based bulk amorphous composite to carry out the following research: seepage casting Prepared W wire / Zr-based amorphous composite, its mechanical properties and deformation characteristics. At room temperature, W fiber / Zr-based amorphous composite compressive fracture strength of 2750MPa, 29% plastic. The destruction of the specimen longitudinal splitting. W wire single shear zone hinder the amorphous matrix, to promote the generation and propagation of multiple shear bands is the microscopic mechanism of the composite material to produce large amounts of plastic deformation. 10 0 ° C 300 ° C , from 340 ° C from 390 ° C of W after the heat treatment of wire / Zr-based amorphous composite at the strain rate of 2 × 10 -4 s -1 2 × 10 -3 s -1 , 2 × 10 -2 s -1 conditions under compression experiments. No significant effect of heat treatment temperature on the W wire / Zr-based amorphous composite mechanical properties in the same strain rate. The heat treatment temperature were 10 of 0 the ℃ 300 C , fracture strength and ductility of the material decreases as the strain rate increases; the heat treatment temperature is 340 ° C when from 390 ° C , as the strain rate increases, no significant change in the breaking strength of the composite, reducing plasticity. at -10 0 ° C from 0 ° C from 150 ° C from 250 ° C 310 << / sup> sup> ℃ W wire / Zr-based amorphous composite five different temperatures compression. As the temperature increases, the W wire / Zr-based amorphous composite elastic modulus, yield strength, fracture strength decreases, plastic pressure. W wire / Zr-based amorphous composite at -10 0 ° C longitudinal splitting failure mode under from 0 ° C 150 the ° C from 250 ° C , of 310 << / sup> sup> ° C destruction mixed longitudinal splitting and distorting damage. W wire / Zr-based amorphous composite in -60 ° C , from -40 ° C from -20 ° C , 0 ° C , 20 ° C under the impact properties. Specimen of brittle fracture, the destruction of the main ways for the the interface destruction and tungsten brittle broken. The impact fracture can be divided into the fracture area and the impact area, an area of ??more than 80% of the fracture zone, the impact of the most severely damaged. As the temperature increases, the impact energy of the material increased from 0.8 J to 1.2J, impact toughness is 47KJ / m2 elevated to 69KJ/m2. The W wire / Zr-based amorphous composite performance of the three-point bending at room temperature. Specimen in three-point bending experiments showed brittle fracture, triangular area tungsten wire - amorphous interface uneven separation sample in contact with the indenter parts of the most severely damaged.

Related Dissertations

  1. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  2. Preperation of Low Friction and Wear Resistant High-Purity Alumina Ceramic,TQ174.1
  3. Longitudinal magnesium alloy AZ91 under AC magnetic field properties of welded joints,TG407
  4. Hot extruded Mg-Zn-Zr-Gd alloy microstructure and mechanical properties,TG379
  5. Functional polyacrylamide hydrogel Preparation and Properties,TB383.1
  6. Cutting silicon brass performance study,TG146.11
  7. Reliability Study on Mechanical Property of ADB610 Steel,TG142.15
  8. Research on Microstructure Evolution in Pre-heat Treatment and Cold Ring Rolling,TG142.15
  9. Of multistage solid solution heat treatment on the microstructure and properties of 7150 aluminum alloy,TG156.94
  10. Effects of Continuous Steam Explosion on the Mechanical Properties of PBS / Vegetable-fiber Composites,TB332
  11. Effects of γ-RAY Irradiation on T700 Carbon Fiber and Its Composite Interface Performance,TB332
  12. Molecular Simulation on the Formation Mechanism of Co-crystal HMX/TATB and Morphology of TATB,TQ560.1
  13. Study on the Relationship between Mechanical Properties and Spherulite Structures of Isotactic Polypropylene,TQ325.14
  14. Study on Preparation and Capability of Two-Component Polyurethane Sealant,TQ436.6
  15. Temperature RTV-1 silicone rubber adhesive of,TQ333.93
  16. Studies on Methacrylic Acid Salt Modified Natural Rubber,TQ330.1
  17. Surface Modification of Magnesium Hydroxide and Its Application in Polyethylene Retardant Composites,TQ320.1
  18. Bimodal molecular weight distribution properties of vinyl ester resins,TQ323.4
  19. The structure and properties of ABS resin,TQ325.2
  20. Preparation and Properties of Water-Soluble Core-Materials Applied for RTM,TB332
  21. Influence of Plastic Deformation on the Distribution of SiC and the Microstructure and Properties of Multi-layer Spray-deposition 7090Al/SiC_p Composite,TB333

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > The alloy learn with a variety of properties of alloys > Other special nature of the alloy > Amorphous alloy
© 2012 www.DissertationTopic.Net  Mobile