MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS
Tungsten heavy alloys are composite materials containing spherical tungsten particles embedded in binder matrix. Their excellent mechanical properties can be further improved by rotary forging. This paper aims to gain deeper understanding of the forging process by investigating the local elastic mod...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2020-06-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6711 |
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| author | Ondřej Kovářík Jaroslav Čech Jiří Čapek Michal Hajíček Jakub Klečka Jan Siegl |
| author_facet | Ondřej Kovářík Jaroslav Čech Jiří Čapek Michal Hajíček Jakub Klečka Jan Siegl |
| author_sort | Ondřej Kovářík |
| collection | DOAJ |
| description | Tungsten heavy alloys are composite materials containing spherical tungsten particles embedded in binder matrix. Their excellent mechanical properties can be further improved by rotary forging. This paper aims to gain deeper understanding of the forging process by investigating the local elastic modulus, hardness, and residual stress of individual phases in W6Ni3Co pseudo-alloy. The resulting global properties of the composite material such as stress-strain behavior, fracture toughness and fatigue crack growth rate behavior are also studied. The results show that sintered and quenched material consists of highly textured matrix containing nearly perfect single crystal spheres of pure W. The rotary forging leads to significant lattice deformations destroying the texture and significantly increasing the hardness of both WNiCo matrix and W particles and making residual stresses in W particles anisotropic with increased compression along the longitudinal axis of the forged part. |
| format | Article |
| id | doaj-art-273edf6269894ba8bbb406d835f44bee |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-273edf6269894ba8bbb406d835f44bee2025-08-20T03:28:41ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822020-06-0127014915410.14311/APP.2020.27.01495241MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYSOndřej Kovářík0Jaroslav Čech1Jiří Čapek2Michal Hajíček3Jakub Klečka4Jan Siegl5Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech RepublicCzech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech RepublicCzech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech RepublicUJP Praha a.s., Nad Kamínkou 1345, Praha-Zbraslav, Czech RepublicCzech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech Republic Czech Academy of Sciences, Institute of Plasma Physics, Za Slovankou 1782/3, Praha-Liben, Czech RepublicCzech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech RepublicTungsten heavy alloys are composite materials containing spherical tungsten particles embedded in binder matrix. Their excellent mechanical properties can be further improved by rotary forging. This paper aims to gain deeper understanding of the forging process by investigating the local elastic modulus, hardness, and residual stress of individual phases in W6Ni3Co pseudo-alloy. The resulting global properties of the composite material such as stress-strain behavior, fracture toughness and fatigue crack growth rate behavior are also studied. The results show that sintered and quenched material consists of highly textured matrix containing nearly perfect single crystal spheres of pure W. The rotary forging leads to significant lattice deformations destroying the texture and significantly increasing the hardness of both WNiCo matrix and W particles and making residual stresses in W particles anisotropic with increased compression along the longitudinal axis of the forged part.https://ojs.cvut.cz/ojs/index.php/APP/article/view/6711instrumented indentation, residual strain, stress-strain, tungsten heavy alloy, w6ni3co |
| spellingShingle | Ondřej Kovářík Jaroslav Čech Jiří Čapek Michal Hajíček Jakub Klečka Jan Siegl MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS Acta Polytechnica CTU Proceedings instrumented indentation, residual strain, stress-strain, tungsten heavy alloy, w6ni3co |
| title | MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS |
| title_full | MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS |
| title_fullStr | MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS |
| title_full_unstemmed | MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS |
| title_short | MECHANICAL PROPERTIES OF FORGED TUNGSTEN HEAVY ALLOYS |
| title_sort | mechanical properties of forged tungsten heavy alloys |
| topic | instrumented indentation, residual strain, stress-strain, tungsten heavy alloy, w6ni3co |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6711 |
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