The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism
The formation of the Zr-containing phases during the solidification of Mg-Zn-Zr alloy is simulated, the structure of the Zr-containing compounds and the solid solution amount of Zr in α -Mg solid solution as well as the grain size of the as-cast alloy are measured. Based on this, the existing form o...
| Glavni autori: | , , , , |
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| Format: | Članak |
| Jezik: | English |
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IOP Publishing
2021-01-01
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| Serija: | Materials Research Express |
| Teme: | |
| Online pristup: | https://doi.org/10.1088/2053-1591/ac083c |
| _version_ | 1827869423322529792 |
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| author | Fangjing Xing Feng Guo Juan Su Xueping Zhao Huisheng Cai |
| author_facet | Fangjing Xing Feng Guo Juan Su Xueping Zhao Huisheng Cai |
| author_sort | Fangjing Xing |
| collection | DOAJ |
| description | The formation of the Zr-containing phases during the solidification of Mg-Zn-Zr alloy is simulated, the structure of the Zr-containing compounds and the solid solution amount of Zr in α -Mg solid solution as well as the grain size of the as-cast alloy are measured. Based on this, the existing form of Zr element in Mg-Zn-Zr alloy and its action mechanism of grain refinement are discussed. The results show that either α -Zr or α -Mg solid solution precipitates first from melt of Mg-Zn-Zr alloy at the beginning of solidification due to the different Zr content, then some Zn-Zr phases with different Zn/Zr atomic ratios form in the alloy melt during solidification. The Zr element in Mg-Zn-Zr alloy mainly exists in the form of compounds, its solid solution amount in α -Mg is not large and is inhibited by Zn element. The Zr in Mg-Zn-Zr alloy has the effect to refine grain, the reason is that the α -Zr phase and α -Mg formed by peritectic reaction or α -Mg formed from Zr atomic clusters can be used as the nucleus of subsequent α -Mg crystals. In addition, the Zr-containing compound formed during solidification can prevent the growth of grains, the enrichment of Zr in the crystallization front can also promote nucleation by component undercooling. |
| first_indexed | 2024-03-12T15:44:02Z |
| format | Article |
| id | doaj.art-64f4a9e99f7d4dbe8f5a14195e9897f1 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:44:02Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-64f4a9e99f7d4dbe8f5a14195e9897f12023-08-09T15:50:20ZengIOP PublishingMaterials Research Express2053-15912021-01-018606651610.1088/2053-1591/ac083cThe existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanismFangjing Xing0https://orcid.org/0000-0002-2743-826XFeng Guo1Juan Su2Xueping Zhao3Huisheng Cai4College of Materials Science and Engineering, Inner Mongolia University of Technology , Hohhot, Inner Mongolia, 010051, People’s Republic of ChinaCollege of Materials Science and Engineering, Inner Mongolia University of Technology , Hohhot, Inner Mongolia, 010051, People’s Republic of ChinaCollege of Materials Science and Engineering, Inner Mongolia University of Technology , Hohhot, Inner Mongolia, 010051, People’s Republic of ChinaTesting Center, Inner Mongolia University of Technology , Hohhot, Inner Mongolia, 010051, People’s Republic of ChinaCollege of Materials Science and Engineering, Inner Mongolia University of Technology , Hohhot, Inner Mongolia, 010051, People’s Republic of ChinaThe formation of the Zr-containing phases during the solidification of Mg-Zn-Zr alloy is simulated, the structure of the Zr-containing compounds and the solid solution amount of Zr in α -Mg solid solution as well as the grain size of the as-cast alloy are measured. Based on this, the existing form of Zr element in Mg-Zn-Zr alloy and its action mechanism of grain refinement are discussed. The results show that either α -Zr or α -Mg solid solution precipitates first from melt of Mg-Zn-Zr alloy at the beginning of solidification due to the different Zr content, then some Zn-Zr phases with different Zn/Zr atomic ratios form in the alloy melt during solidification. The Zr element in Mg-Zn-Zr alloy mainly exists in the form of compounds, its solid solution amount in α -Mg is not large and is inhibited by Zn element. The Zr in Mg-Zn-Zr alloy has the effect to refine grain, the reason is that the α -Zr phase and α -Mg formed by peritectic reaction or α -Mg formed from Zr atomic clusters can be used as the nucleus of subsequent α -Mg crystals. In addition, the Zr-containing compound formed during solidification can prevent the growth of grains, the enrichment of Zr in the crystallization front can also promote nucleation by component undercooling.https://doi.org/10.1088/2053-1591/ac083cZr elementMg-Zn-Zr magnesium alloyZr-containing phasegrain refinementsolidification process |
| spellingShingle | Fangjing Xing Feng Guo Juan Su Xueping Zhao Huisheng Cai The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism Materials Research Express Zr element Mg-Zn-Zr magnesium alloy Zr-containing phase grain refinement solidification process |
| title | The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism |
| title_full | The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism |
| title_fullStr | The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism |
| title_full_unstemmed | The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism |
| title_short | The existing forms of Zr in Mg-Zn-Zr magnesium alloys and its grain refinement mechanism |
| title_sort | existing forms of zr in mg zn zr magnesium alloys and its grain refinement mechanism |
| topic | Zr element Mg-Zn-Zr magnesium alloy Zr-containing phase grain refinement solidification process |
| url | https://doi.org/10.1088/2053-1591/ac083c |
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