The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process
A novel compact preparation process has been developed to produce a Cu-20Ni-20Mn alloy. This process involves heating-cooling combined mould (HCCM) continuous casting, a solution treatment at 800 °C, rolling at room temperature and a final ageing step at 450 °C. This process eliminates two hot defor...
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MDPI AG
2020-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/11/1528 |
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| author | Rui Wang Yilei Fu Guoliang Xie Zifan Hao Shuai Zhang Xinhua Liu |
| author_facet | Rui Wang Yilei Fu Guoliang Xie Zifan Hao Shuai Zhang Xinhua Liu |
| author_sort | Rui Wang |
| collection | DOAJ |
| description | A novel compact preparation process has been developed to produce a Cu-20Ni-20Mn alloy. This process involves heating-cooling combined mould (HCCM) continuous casting, a solution treatment at 800 °C, rolling at room temperature and a final ageing step at 450 °C. This process eliminates two hot deformation processes, namely, hot forging and hot rolling, greatly improving production efficiency and reducing production costs compared with the traditional preparation process. The alloy fabricated by this process was found to have excellent mechanical properties. Additionally, the formation of precipitated phases during the ageing step is accelerated by this new process. The hardness of the samples reaches 476 HV after ageing for 10 h. Stable, ordered precipitates of Ni<sub>3</sub>Mn(L<inline-formula><math display="inline"><semantics><mrow><msub><mn>1</mn><mn>2</mn></msub></mrow></semantics></math></inline-formula> phase) are observed in the rolled specimen, and the orientation relationship between the copper matrix and ordered Ni<sub>3</sub>Mn phase (L<inline-formula><math display="inline"><semantics><mrow><msub><mn>1</mn><mn>2</mn></msub></mrow></semantics></math></inline-formula> phase) is [200]<sub>Cu</sub>//[010]<sub>Ni3Mn</sub> and [011]<sub>Cu</sub>//[011]<sub>Ni3Mn</sub>. Precipitation strengthening is the main reason for the increase of strength of the sample during the ageing process. The mechanical properties and ageing precipitation process of the alloy are affected by the rolling process. The precipitation rate of the rolled sample is greatly increased during the ageing process, leading to a larger amount of precipitates. |
| first_indexed | 2024-03-10T14:47:05Z |
| format | Article |
| id | doaj.art-bd468af2bcd746da9e6dc5f1f8c905e7 |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T14:47:05Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-bd468af2bcd746da9e6dc5f1f8c905e72023-11-20T21:20:59ZengMDPI AGMetals2075-47012020-11-011011152810.3390/met10111528The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation ProcessRui Wang0Yilei Fu1Guoliang Xie2Zifan Hao3Shuai Zhang4Xinhua Liu5Key Laboratory for Advanced Materials Processing of Ministry of Education, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaKey Laboratory for Advanced Materials Processing of Ministry of Education, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, No. 30, Xueyuan Road, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, No. 30, Xueyuan Road, Beijing 100083, ChinaKey Laboratory for Advanced Materials Processing of Ministry of Education, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaKey Laboratory for Advanced Materials Processing of Ministry of Education, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaA novel compact preparation process has been developed to produce a Cu-20Ni-20Mn alloy. This process involves heating-cooling combined mould (HCCM) continuous casting, a solution treatment at 800 °C, rolling at room temperature and a final ageing step at 450 °C. This process eliminates two hot deformation processes, namely, hot forging and hot rolling, greatly improving production efficiency and reducing production costs compared with the traditional preparation process. The alloy fabricated by this process was found to have excellent mechanical properties. Additionally, the formation of precipitated phases during the ageing step is accelerated by this new process. The hardness of the samples reaches 476 HV after ageing for 10 h. Stable, ordered precipitates of Ni<sub>3</sub>Mn(L<inline-formula><math display="inline"><semantics><mrow><msub><mn>1</mn><mn>2</mn></msub></mrow></semantics></math></inline-formula> phase) are observed in the rolled specimen, and the orientation relationship between the copper matrix and ordered Ni<sub>3</sub>Mn phase (L<inline-formula><math display="inline"><semantics><mrow><msub><mn>1</mn><mn>2</mn></msub></mrow></semantics></math></inline-formula> phase) is [200]<sub>Cu</sub>//[010]<sub>Ni3Mn</sub> and [011]<sub>Cu</sub>//[011]<sub>Ni3Mn</sub>. Precipitation strengthening is the main reason for the increase of strength of the sample during the ageing process. The mechanical properties and ageing precipitation process of the alloy are affected by the rolling process. The precipitation rate of the rolled sample is greatly increased during the ageing process, leading to a larger amount of precipitates.https://www.mdpi.com/2075-4701/10/11/1528Cu-20Ni-20Mn alloycompact preparation processmechanical propertiesmicrostructure evolutioncombined ageing process |
| spellingShingle | Rui Wang Yilei Fu Guoliang Xie Zifan Hao Shuai Zhang Xinhua Liu The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process Metals Cu-20Ni-20Mn alloy compact preparation process mechanical properties microstructure evolution combined ageing process |
| title | The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process |
| title_full | The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process |
| title_fullStr | The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process |
| title_full_unstemmed | The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process |
| title_short | The Microstructure and Mechanical Properties of Cu-20Ni-20Mn Alloy Fabricated by a Compact Preparation Process |
| title_sort | microstructure and mechanical properties of cu 20ni 20mn alloy fabricated by a compact preparation process |
| topic | Cu-20Ni-20Mn alloy compact preparation process mechanical properties microstructure evolution combined ageing process |
| url | https://www.mdpi.com/2075-4701/10/11/1528 |
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