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Effect of heating process on fracture behaviors of [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4] composites
[W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](30) composites and [W.sub.f]/ [Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](60) composites were prepared by penetrating casting method. Three-point bending test and dynamic compression test showed that [W.sub.f]/[Cu.sub.82][Al.sub.10] [Fe.sub.4][Ni.s...
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Published in: | Journal of materials science 2011-08, Vol.46 (16), p.5541 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](30) composites and [W.sub.f]/ [Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](60) composites were prepared by penetrating casting method. Three-point bending test and dynamic compression test showed that [W.sub.f]/[Cu.sub.82][Al.sub.10] [Fe.sub.4][Ni.sub.4](30) composites possessed higher mechanical properties than [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](60) composites. Microstructure observation of [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](30) composites revealed that a small amount of tungsten diffused into the Fe-Ni solid solution precipitated on the surface of tungsten fibers. The damage occurred mainly within the tungsten fibers after three-point bending test and dynamic compression test in [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](30) composites, indicating that the composites possessed high interface strength. Dislocation density was high and stacking faults emerged in [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](30) composites after dynamic compression. Microstructure observation of [W.sub.f]/[Cu.sub.82][Al.sub.10] [Fe.sub.4][Ni.sub.4](60) composites revealed that long strip of tungsten grains occurred at the edge of tungsten fibers, within which damage mainly emerged after three-point bending test, indicating that strength of the edge of tungsten fibers was low in [W.sub.f]/[Cu.sub.82][Al.sub.10][Fe.sub.4][Ni.sub.4](60) composites. The fibrous structure of tungsten fiber was coarse or even disappeared in some areas, and dislocation density was low in [W.sub.f]/[Cu.sub.82][Al.sub.10] [Fe.sub.4][Ni.sub.4](60) composites after dynamic compression. |
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ISSN: | 0022-2461 |
DOI: | 10.1007/s10853-011-5500-1 |