Lowering thermal expansion of Mg with the enhanced strength by Ca alloying
The influence of Ca on the thermal expansion and mechanical properties of Mg are investigated in the present work. Alloying Ca is demonstrated to noticeably decrease the coefficient of thermal expansion (CTE) within a wide temperature interval and increase the strength of Mg at both as-cast and extr...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423005045 |
| _version_ | 1797798876504129536 |
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| author | Cuihong Wang Zhihua Dong Bin Jiang Zengyong Zheng Sujuan Wu Jiangfeng Song Ang Zhang Junyao Xu Baoqing Yang Changyong Zheng Fusheng Pan |
| author_facet | Cuihong Wang Zhihua Dong Bin Jiang Zengyong Zheng Sujuan Wu Jiangfeng Song Ang Zhang Junyao Xu Baoqing Yang Changyong Zheng Fusheng Pan |
| author_sort | Cuihong Wang |
| collection | DOAJ |
| description | The influence of Ca on the thermal expansion and mechanical properties of Mg are investigated in the present work. Alloying Ca is demonstrated to noticeably decrease the coefficient of thermal expansion (CTE) within a wide temperature interval and increase the strength of Mg at both as-cast and extruded state. A low CTE of ∼18.6 × 10−6 K−1 in combination with the high compressive yield strength of 262 MPa are achieved within the studied concentration interval. The reduced CTE of Mg–Ca alloys is found to closely correlate with the increased Debye temperature with Ca, which primarily emerges from the increased precipitation of Mg2Ca phase showing the relatively high melting point, elastic/shear moduli and low CTE. Similarly, the increased fraction of the eutectic lamellar structure consisting of Mg2Ca and α-Mg dominates the noticeable increase of strength of the as-cast Mg–Ca alloys. The lamellar structure is broken into fine particles dispersing in the matrix at extruded state, which in combination with the refined microstructure yields the dominated contribution to the increment of strength. The low thermal expansion and high strength achieved in the designed Mg–Ca alloys provide a feasible route for the development of advanced Mg alloys. |
| first_indexed | 2024-03-13T04:10:23Z |
| format | Article |
| id | doaj.art-6a23719f0f83486fbe686b17134b315f |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:10:23Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6a23719f0f83486fbe686b17134b315f2023-06-21T06:55:37ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012412931303Lowering thermal expansion of Mg with the enhanced strength by Ca alloyingCuihong Wang0Zhihua Dong1Bin Jiang2Zengyong Zheng3Sujuan Wu4Jiangfeng Song5Ang Zhang6Junyao Xu7Baoqing Yang8Changyong Zheng9Fusheng Pan10National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China; Chongqing Institute for Advanced Light Metals, Chongqing 400030, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China; Chongqing Institute for Advanced Light Metals, Chongqing 400030, China; Corresponding author.National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China; Chongqing Institute for Advanced Light Metals, Chongqing 400030, China; Corresponding author.National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China; Chongqing Institute for Advanced Light Metals, Chongqing 400030, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China; Chongqing Institute for Advanced Light Metals, Chongqing 400030, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaZhejiang Hengfeng Top Leisure Co., Ltd, Zhejiang 313299, ChinaZhejiang Hengfeng Top Leisure Co., Ltd, Zhejiang 313299, ChinaNational Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaThe influence of Ca on the thermal expansion and mechanical properties of Mg are investigated in the present work. Alloying Ca is demonstrated to noticeably decrease the coefficient of thermal expansion (CTE) within a wide temperature interval and increase the strength of Mg at both as-cast and extruded state. A low CTE of ∼18.6 × 10−6 K−1 in combination with the high compressive yield strength of 262 MPa are achieved within the studied concentration interval. The reduced CTE of Mg–Ca alloys is found to closely correlate with the increased Debye temperature with Ca, which primarily emerges from the increased precipitation of Mg2Ca phase showing the relatively high melting point, elastic/shear moduli and low CTE. Similarly, the increased fraction of the eutectic lamellar structure consisting of Mg2Ca and α-Mg dominates the noticeable increase of strength of the as-cast Mg–Ca alloys. The lamellar structure is broken into fine particles dispersing in the matrix at extruded state, which in combination with the refined microstructure yields the dominated contribution to the increment of strength. The low thermal expansion and high strength achieved in the designed Mg–Ca alloys provide a feasible route for the development of advanced Mg alloys.http://www.sciencedirect.com/science/article/pii/S2238785423005045Mg alloysThermal expansionMechanical propertiesAlloying |
| spellingShingle | Cuihong Wang Zhihua Dong Bin Jiang Zengyong Zheng Sujuan Wu Jiangfeng Song Ang Zhang Junyao Xu Baoqing Yang Changyong Zheng Fusheng Pan Lowering thermal expansion of Mg with the enhanced strength by Ca alloying Journal of Materials Research and Technology Mg alloys Thermal expansion Mechanical properties Alloying |
| title | Lowering thermal expansion of Mg with the enhanced strength by Ca alloying |
| title_full | Lowering thermal expansion of Mg with the enhanced strength by Ca alloying |
| title_fullStr | Lowering thermal expansion of Mg with the enhanced strength by Ca alloying |
| title_full_unstemmed | Lowering thermal expansion of Mg with the enhanced strength by Ca alloying |
| title_short | Lowering thermal expansion of Mg with the enhanced strength by Ca alloying |
| title_sort | lowering thermal expansion of mg with the enhanced strength by ca alloying |
| topic | Mg alloys Thermal expansion Mechanical properties Alloying |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423005045 |
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