기계적성질 / 기계적 합금화법으로 제조된 텅스텐 중합금의 동적 비틀림 거동Mechanical Behavior / Dynamic Torsional Behavior of Tungsten Heavy Alloys Fabricated by Mechanical Alloying

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Dynamic torsional behavior of tungsten heavy alloys fabricated by mechanical alloying was investigated in order to evaluate the possibility of the adiabatic shear band formation. Dynamic torsional tests were conducted for tungsten alloy specimens fabricated with different sintering temperatures after mechanical alloying, and then the test data were compared with those of a conventionally processed specimen. The refinement of tungsten particles could be obtained after mechanical alloying, although contiguity, i.e., volume fraction of the interfacial area between tungsten particles, was seriously increased, thereby leading to very low ductility and impact energy. The dynamic test results indicated that interfacial fracture between tungsten particles occurred over broad deformed areas in these specimens, expecting the low possibility of the shear band formation. However, application of partial mechanical alloying was effective in the shear band formation since a wide matrix pool acted as a site of localized deformation. These findings suggested that the idea of making matrix pools by partial mechanical alloying would be useful for improving the penetration performance of tungsten heavy alloys.
Publisher
대한금속·재료학회
Issue Date
1999-01
Language
Korean
Citation

대한금속·재료학회지, v.37, no.1, pp.33 - 41

ISSN
1738-8228
URI
http://hdl.handle.net/10203/77693
Appears in Collection
MS-Journal Papers(저널논문)
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