Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys
Hot tearing susceptibility (HTS) of Mg–2Zn–(3 + 0.5x)Y–xAl (x = 0, 2 and 3 at%) alloys is predicted by using modified Clyne–Davies’ model (CSC*). The solidification path, solidification characteristic temperatures and dendritic coherency solid fraction have been studied by double-thermocouple therma...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2019-06-01
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| Series: | Journal of Magnesium and Alloys |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956719300337 |
| _version_ | 1797203380880277504 |
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| author | Guojia Zhang Yue Wang Zheng Liu Shimeng Liu |
| author_facet | Guojia Zhang Yue Wang Zheng Liu Shimeng Liu |
| author_sort | Guojia Zhang |
| collection | DOAJ |
| description | Hot tearing susceptibility (HTS) of Mg–2Zn–(3 + 0.5x)Y–xAl (x = 0, 2 and 3 at%) alloys is predicted by using modified Clyne–Davies’ model (CSC*). The solidification path, solidification characteristic temperatures and dendritic coherency solid fraction have been studied by double-thermocouple thermal analysis. The solidification contraction stress vs. temperature (and time) curves are measured by using a “T” type hot tearing permanent-mold. The results reveal that the CSC* prediction values are in good agreement with the experimental results. Moreover, Al2Y phase acts as the heterogeneous nucleation core of α-Mg and significantly influences the grain size. It has been observed that minimum grain size, optimal dendritic coherency and minimum HTS are exhibited by Mg–2Zn–(3 + 0.5x)Y–xAl alloy (x = 2). Furthermore, when Al content was increased to 3 at%, Al2Y phase exhibited a peritectic reaction and transformed into a mixed structure of Al2Y and Al + Al3Y phases, which increased the HTS of the alloy due to reduced fine-grained Al2Y content. Keywords: Mg–Zn–Y–Al alloys, Hot tearing susceptibility (HTS), Solidification path, Clyne–Davies’ model (CSC*), Dendritic coherency |
| first_indexed | 2024-04-24T08:18:25Z |
| format | Article |
| id | doaj.art-a7a6242807cc476d9d79d2f1278dc068 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:18:25Z |
| publishDate | 2019-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-a7a6242807cc476d9d79d2f1278dc0682024-04-17T02:39:00ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672019-06-0172272282Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloysGuojia Zhang0Yue Wang1Zheng Liu2Shimeng Liu3School of Materials Science and Engineering, Shenyang University of technology, Shenyang 110870, P.R. ChinaCorresponding author.; School of Materials Science and Engineering, Shenyang University of technology, Shenyang 110870, P.R. ChinaSchool of Materials Science and Engineering, Shenyang University of technology, Shenyang 110870, P.R. ChinaSchool of Materials Science and Engineering, Shenyang University of technology, Shenyang 110870, P.R. ChinaHot tearing susceptibility (HTS) of Mg–2Zn–(3 + 0.5x)Y–xAl (x = 0, 2 and 3 at%) alloys is predicted by using modified Clyne–Davies’ model (CSC*). The solidification path, solidification characteristic temperatures and dendritic coherency solid fraction have been studied by double-thermocouple thermal analysis. The solidification contraction stress vs. temperature (and time) curves are measured by using a “T” type hot tearing permanent-mold. The results reveal that the CSC* prediction values are in good agreement with the experimental results. Moreover, Al2Y phase acts as the heterogeneous nucleation core of α-Mg and significantly influences the grain size. It has been observed that minimum grain size, optimal dendritic coherency and minimum HTS are exhibited by Mg–2Zn–(3 + 0.5x)Y–xAl alloy (x = 2). Furthermore, when Al content was increased to 3 at%, Al2Y phase exhibited a peritectic reaction and transformed into a mixed structure of Al2Y and Al + Al3Y phases, which increased the HTS of the alloy due to reduced fine-grained Al2Y content. Keywords: Mg–Zn–Y–Al alloys, Hot tearing susceptibility (HTS), Solidification path, Clyne–Davies’ model (CSC*), Dendritic coherencyhttp://www.sciencedirect.com/science/article/pii/S2213956719300337 |
| spellingShingle | Guojia Zhang Yue Wang Zheng Liu Shimeng Liu Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys Journal of Magnesium and Alloys |
| title | Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys |
| title_full | Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys |
| title_fullStr | Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys |
| title_full_unstemmed | Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys |
| title_short | Influence of Al addition on solidification path and hot tearing susceptibility of Mg–2Zn–(3 + 0.5x)Y–xAl alloys |
| title_sort | influence of al addition on solidification path and hot tearing susceptibility of mg 2zn 3 0 5x y xal alloys |
| url | http://www.sciencedirect.com/science/article/pii/S2213956719300337 |
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