Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy
The aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into me...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-02-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000100009 |
| _version_ | 1828475003570487296 |
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| author | Hyung-Il Kim Tae-Wan Kim Young-Oh Kim Su-Yeon Cho Gwang-Young Lee Yong Hoon Kwon Hyo-Joung Seol |
| author_facet | Hyung-Il Kim Tae-Wan Kim Young-Oh Kim Su-Yeon Cho Gwang-Young Lee Yong Hoon Kwon Hyo-Joung Seol |
| author_sort | Hyung-Il Kim |
| collection | DOAJ |
| description | The aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into metastable Ag-rich' and Cu-rich' phases. The constant hardening after apparent initial hardening was the result of a subsequent transformation of the metastable Ag-rich' and Cu-rich' phases to the stable Ag-rich α1phase and AuCu I phase through the metastable AuCu I' phase. During the increase in hardness, fine block-like structure with high coherency formed in the grain interior, which changed to a fine cross-hatched structure. A relatively coarse lamellar structure composed of Ag-rich α1and AuCu I phases grew from the grain boundaries, initiating softening before the grain interior reached its maximum hardness. As a result, the spinodal decomposition attributed to rapid hardening by forming the fine block-like structure, and the subsequent ordering into AuCu I, which is a famous hardening mechanism, weakened its hardening effect by accelerating the lamellar-forming grain boundary reaction. |
| first_indexed | 2024-12-11T06:07:32Z |
| format | Article |
| id | doaj.art-19079ebe8794424aab61c63885f8b866 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-11T06:07:32Z |
| publishDate | 2013-02-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-19079ebe8794424aab61c63885f8b8662022-12-22T01:18:15ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-02-011617187Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloyHyung-Il KimTae-Wan KimYoung-Oh KimSu-Yeon ChoGwang-Young LeeYong Hoon KwonHyo-Joung SeolThe aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into metastable Ag-rich' and Cu-rich' phases. The constant hardening after apparent initial hardening was the result of a subsequent transformation of the metastable Ag-rich' and Cu-rich' phases to the stable Ag-rich α1phase and AuCu I phase through the metastable AuCu I' phase. During the increase in hardness, fine block-like structure with high coherency formed in the grain interior, which changed to a fine cross-hatched structure. A relatively coarse lamellar structure composed of Ag-rich α1and AuCu I phases grew from the grain boundaries, initiating softening before the grain interior reached its maximum hardness. As a result, the spinodal decomposition attributed to rapid hardening by forming the fine block-like structure, and the subsequent ordering into AuCu I, which is a famous hardening mechanism, weakened its hardening effect by accelerating the lamellar-forming grain boundary reaction.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000100009spinodal decompositionmetastable phaseage-hardeninglamellar-forming grain boundary reaction |
| spellingShingle | Hyung-Il Kim Tae-Wan Kim Young-Oh Kim Su-Yeon Cho Gwang-Young Lee Yong Hoon Kwon Hyo-Joung Seol Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy Materials Research spinodal decomposition metastable phase age-hardening lamellar-forming grain boundary reaction |
| title | Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
| title_full | Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
| title_fullStr | Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
| title_full_unstemmed | Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
| title_short | Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
| title_sort | age hardenability and related microstructural changes during and after phase transformation in an au ag cu based dental alloy |
| topic | spinodal decomposition metastable phase age-hardening lamellar-forming grain boundary reaction |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000100009 |
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