Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys
The study developed the three alloy systems with different precipitates and examined the role of precipitated phase particles in modifying the creep properties of as-cast Mg-10Bi-0.5Mn-0.5Ag (BMQ1000), Mg-5Bi-5Sn-0.5Mn-0.5Ag (BTMQ5500) and Mg-10Sn-0.5Mn-0.5Ag (TMQ1000) alloys at temperatures ranging...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-11-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956723001925 |
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| author | Gang Xu Wei-li Cheng Yi-hao Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang |
| author_facet | Gang Xu Wei-li Cheng Yi-hao Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang |
| author_sort | Gang Xu |
| collection | DOAJ |
| description | The study developed the three alloy systems with different precipitates and examined the role of precipitated phase particles in modifying the creep properties of as-cast Mg-10Bi-0.5Mn-0.5Ag (BMQ1000), Mg-5Bi-5Sn-0.5Mn-0.5Ag (BTMQ5500) and Mg-10Sn-0.5Mn-0.5Ag (TMQ1000) alloys at temperatures ranging from 423 to 473 K and stresses of 45–85 MPa. The values of n for the BMQ1000, BTMQ5500, and TMQ1000 alloys were determined as 6.67, 5.75, and 5.92, respectively. Moreover, the activation energy for these alloys was found to be 164.71, 134.68, and 135.93 kJ/mol, respectively. The results suggested that the creep properties followed the order of BTMQ5500 > TMQ1000 > BMQ1000. A coarse and uneven distribution of the Mg3Bi2 precipitated phase in the BMQ1000 alloy leads to a feeble pining effect on dislocation slipping and generates substantial stress concentrations. For TMQ1000 alloy, while the nanoscale Mg2Sn precipitates have a stronger barrier effect on dislocations than the Mg3Bi2 in the BMQ1000 alloy, their ability to inhibit dislocation climbing is comparatively weak. Furthermore, it was found that Mg2Sn precipitates and α-Mg exhibited a preferential orientation relationship of (020)Mg2Sn // (–1010)Mg, and the morphology of the precipitated phase transformed in a way that hinders dislocation movement effectively. In addition, elastic interactions between the precipitated phases are identified. The above-mentioned factors are largely responsible for the notable enhancement in creep resistance. Further, it is ascertained that cross-slip and pyramidal 〈c + a〉 slip are primary creep mechanisms in the BMQ1000 alloy. In contrast, the dominant mechanisms in TMQ1000 and BTMQ5500 alloys are dislocation climb and pyramidal 〈c + a〉 slip. Moreover, stacking faults (SFs) and twinning assist in the creep deformation of the BTMQ5500 alloy. |
| format | Article |
| id | doaj-art-48a01b3787e54485864422ed14c3e51e |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-48a01b3787e54485864422ed14c3e51e2025-01-05T04:28:02ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-11-01121146824693Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloysGang Xu0Wei-li Cheng1Yi-hao Luo2Hui Yu3Li-fei Wang4Hang Li5Hong-xia Wang6Jin-hui Wang7School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Corresponding author.School of Materials Science and Engineering, Zhejiang University, Hangzhou 310000, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaQinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, ChinaThe study developed the three alloy systems with different precipitates and examined the role of precipitated phase particles in modifying the creep properties of as-cast Mg-10Bi-0.5Mn-0.5Ag (BMQ1000), Mg-5Bi-5Sn-0.5Mn-0.5Ag (BTMQ5500) and Mg-10Sn-0.5Mn-0.5Ag (TMQ1000) alloys at temperatures ranging from 423 to 473 K and stresses of 45–85 MPa. The values of n for the BMQ1000, BTMQ5500, and TMQ1000 alloys were determined as 6.67, 5.75, and 5.92, respectively. Moreover, the activation energy for these alloys was found to be 164.71, 134.68, and 135.93 kJ/mol, respectively. The results suggested that the creep properties followed the order of BTMQ5500 > TMQ1000 > BMQ1000. A coarse and uneven distribution of the Mg3Bi2 precipitated phase in the BMQ1000 alloy leads to a feeble pining effect on dislocation slipping and generates substantial stress concentrations. For TMQ1000 alloy, while the nanoscale Mg2Sn precipitates have a stronger barrier effect on dislocations than the Mg3Bi2 in the BMQ1000 alloy, their ability to inhibit dislocation climbing is comparatively weak. Furthermore, it was found that Mg2Sn precipitates and α-Mg exhibited a preferential orientation relationship of (020)Mg2Sn // (–1010)Mg, and the morphology of the precipitated phase transformed in a way that hinders dislocation movement effectively. In addition, elastic interactions between the precipitated phases are identified. The above-mentioned factors are largely responsible for the notable enhancement in creep resistance. Further, it is ascertained that cross-slip and pyramidal 〈c + a〉 slip are primary creep mechanisms in the BMQ1000 alloy. In contrast, the dominant mechanisms in TMQ1000 and BTMQ5500 alloys are dislocation climb and pyramidal 〈c + a〉 slip. Moreover, stacking faults (SFs) and twinning assist in the creep deformation of the BTMQ5500 alloy.http://www.sciencedirect.com/science/article/pii/S2213956723001925Magnesium alloyMicrostructural characteristicsCreep propertiesPrecipitatesCreep mechanism |
| spellingShingle | Gang Xu Wei-li Cheng Yi-hao Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys Journal of Magnesium and Alloys Magnesium alloy Microstructural characteristics Creep properties Precipitates Creep mechanism |
| title | Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys |
| title_full | Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys |
| title_fullStr | Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys |
| title_full_unstemmed | Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys |
| title_short | Elucidating the role of precipitated phase particles in modifying creep properties of as-cast Mg-Bi/Sn-based alloys |
| title_sort | elucidating the role of precipitated phase particles in modifying creep properties of as cast mg bi sn based alloys |
| topic | Magnesium alloy Microstructural characteristics Creep properties Precipitates Creep mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2213956723001925 |
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