DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ryu, Ho Jin | ko |
dc.contributor.author | Hong, Soon-Hyung | ko |
dc.date.accessioned | 2008-02-15T09:35:39Z | - |
dc.date.available | 2008-02-15T09:35:39Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2001-06 | - |
dc.identifier.citation | METALS AND MATERIALS INTERNATIONAL, v.7, no.3, pp.221 - 226 | - |
dc.identifier.issn | 1225-9438 | - |
dc.identifier.uri | http://hdl.handle.net/10203/3053 | - |
dc.description.abstract | The effects of sintering conditions on the microstructural evolution and mechanical properties of mechanically alloyed tungsten heavy alloys were investigated. W, Ni and Fe powders were mechanically alloyed in a tumbler ball mill at a milling speed of 75 rpm, ball-to-powder ratio of 20:1 and ball filling ratio of 15%. The mechanically alloyed powders were compacted and solid-state sintered at a temperature of 1300 degreesC for 1 hour in a hydrogen atmosphere. The solid-state sintered tungsten heavy alloy was subsequently liquid-phase sintered at 1470 degreesC with varying sintering times from 4 min to 90 min. The solid-state sintered tungsten heavy alloy showed fine tungsten particles of 3 mum in diameter and high relative density above 99%. The volume fraction of the W-Ni-Fe matrix phase was measured, as 11% and tungsten/tungsten contiguity was 0.74 in solid-state sintered tungsten heavy alloys. Mechanically alloyed and two-step sintered tungsten heavy alloys showed tungsten particles of 6-15 mum and a volume fraction of the W-Ni-Fe matrix phase of 16% and tungsten/ tungsten contiguity of 0.40. The solid-state sintered tungsten heavy alloy exhibited a yield strength of about 1100 MPa due to its finer tungsten particles, while it showed low elongation and impact energy due to its large tungsten/tungsten contiguity. The yield strength of two-step sintered tungsten heavy alloys increased with the decreasing of tungsten particle size and volume fraction of the W-Ni-Fe matrix. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | Korean Institute of Metals and Materials | - |
dc.title | Effects of sintering conditions on mechanical properties of mechanically alloyed tungsten heavy alloys | - |
dc.type | Article | - |
dc.identifier.wosid | 000169589700006 | - |
dc.identifier.scopusid | 2-s2.0-0040436930 | - |
dc.type.rims | ART | - |
dc.citation.volume | 7 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 221 | - |
dc.citation.endingpage | 226 | - |
dc.citation.publicationname | METALS AND MATERIALS INTERNATIONAL | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Ryu, Ho Jin | - |
dc.contributor.localauthor | Hong, Soon-Hyung | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | tungsten heavy alloy | - |
dc.subject.keywordAuthor | mechanical alloying | - |
dc.subject.keywordAuthor | solid-state sintering | - |
dc.subject.keywordAuthor | two-step sintering | - |
dc.subject.keywordAuthor | mechanical properties | - |
dc.subject.keywordPlus | COMPOSITES | - |
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