DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hong, Soon-Hyung | ko |
dc.contributor.author | Ryu, Ho Jin | ko |
dc.date.accessioned | 2008-02-15T09:41:45Z | - |
dc.date.available | 2008-02-15T09:41:45Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2003-03 | - |
dc.identifier.citation | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.344, no.1-2, pp.253 - 260 | - |
dc.identifier.issn | 0921-5093 | - |
dc.identifier.uri | http://hdl.handle.net/10203/3054 | - |
dc.description.abstract | The microstructural evolution and mechanical properties of a mechanically alloyed and two-stage sintered tungsten heavy alloy were investigated. Elemental powders of tungsten, nickel and iron of a composition corresponding to 93W-5.6Ni-1.4Fe were mechanically alloyed in a tumbler ball mill for 72 h. Mechanically alloyed powders were solid-state sintered at 1300 degreesC for 1 hr in a hydrogen atmosphere followed by secondary sintering at 1445-1485 degreesC for a sintering time ranging from 4 to 90 min. Solid-state sintered tungsten heavy alloys exhibited full densification (above 99% in relative density) due to the enhanced sintering resulting from mechanical alloying. Secondary sintering with a rapid heating rate changed the microstructures of the solid-state sintered alloy with contiguous tungsten phases into a dispersion alloy with spherical tungsten particles embedded in the W-Ni-Fe matrix, maintaining fine tungsten particle due to the combination of a mechanical alloying and a short sintering time. The two-stage sintered tungsten heavy alloy from mechanically alloyed powders showed finer tungsten particle (about 6 mum in diameter) than in conventional liquid-phase sintered tungsten heavy alloys. The mechanical properties of a tungsten heavy alloy were found to be dependent on the microstructural parameters such as tungsten particle size, matrix volume fraction and tungsten/tungsten contiguity which are controllable through the two-stage sintering process. (C) 2002 Elsevier Science B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Combination of mechanical alloying and two-stage sintering of a 93W-5.6Ni-1.4Fe tungsten heavy alloy | - |
dc.type | Article | - |
dc.identifier.wosid | 000180389300030 | - |
dc.identifier.scopusid | 2-s2.0-0037444259 | - |
dc.type.rims | ART | - |
dc.citation.volume | 344 | - |
dc.citation.issue | 1-2 | - |
dc.citation.beginningpage | 253 | - |
dc.citation.endingpage | 260 | - |
dc.citation.publicationname | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Hong, Soon-Hyung | - |
dc.contributor.localauthor | Ryu, Ho Jin | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | tungsten heavy alloy | - |
dc.subject.keywordAuthor | mechanical alloying | - |
dc.subject.keywordAuthor | two-stage sintering | - |
dc.subject.keywordAuthor | microstructural parameter | - |
dc.subject.keywordAuthor | mechanical properties | - |
dc.subject.keywordPlus | DYNAMIC DEFORMATION-BEHAVIOR | - |
dc.subject.keywordPlus | ENERGY PENETRATOR MATERIALS | - |
dc.subject.keywordPlus | TEMPERATURE-DEPENDENCE | - |
dc.subject.keywordPlus | STRAIN-RATE | - |
dc.subject.keywordPlus | MICROSTRUCTURE | - |
dc.subject.keywordPlus | IMPACT | - |
dc.subject.keywordPlus | COMPOSITES | - |
dc.subject.keywordPlus | REFINEMENT | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.