Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films
In this work, the Al-Mo nanocrystalline alloy films with Mo contents ranging from 0–10.5 at.% were prepared via magnetron co-sputtering technology. The composition and microstructure of alloy thin films were studied using XRD, TEM, and EDS. The mechanical behaviors were tested through nanoindentatio...
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2024-12-01
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| author | Ying Wang Huanqing Xu Yulan Chen Xiaoben Qi Ning Zhong |
| author_facet | Ying Wang Huanqing Xu Yulan Chen Xiaoben Qi Ning Zhong |
| author_sort | Ying Wang |
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| description | In this work, the Al-Mo nanocrystalline alloy films with Mo contents ranging from 0–10.5 at.% were prepared via magnetron co-sputtering technology. The composition and microstructure of alloy thin films were studied using XRD, TEM, and EDS. The mechanical behaviors were tested through nanoindentation. The weights of each strengthening factor were calculated and the strengthening mechanism of alloy thin films was revealed. The results indicate that a portion of Mo atoms exist in the Al lattice, forming a solid solution of Mo in Al. The other part of Mo atoms tends to segregate at the grain boundaries, and this segregation becomes more pronounced with an increase in Mo content. There are no compounds or second phases present in any alloy films. As the Mo element content increases, the grain size of the alloy films gradually decreases. The hardness of pure aluminum film is 2.2 GPa. The hardness increases with an increase in Mo content. When the Mo content is 10.5 at.%, The hardness of the film increases to a maximum value of 4.9 GPa. The fine grain (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>g</mi><mi>b</mi></mrow></msub></mrow></semantics></math></inline-formula>), solid solution (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>), and nanocrystalline solute pinning (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>n</mi><mi>c</mi><mo>,</mo><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>) are the three main reasons for the increase in the hardness of alloy thin films. The contribution of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>g</mi><mi>b</mi></mrow></msub></mrow></semantics></math></inline-formula> is the largest, accounting for over 60% of the total, while the contribution of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula> accounts for about 30%, ranking second. The rest of the increase is due to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>n</mi><mi>c</mi><mo>,</mo><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>. |
| format | Article |
| id | doaj-art-4eebaf0c45924eaea0eecc59c103097c |
| institution | DOAJ |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-12-01 |
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| series | Nanomaterials |
| spelling | doaj-art-4eebaf0c45924eaea0eecc59c103097c2025-08-20T02:57:17ZengMDPI AGNanomaterials2079-49912024-12-011424199010.3390/nano14241990Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy FilmsYing Wang0Huanqing Xu1Yulan Chen2Xiaoben Qi3Ning Zhong4School of Materials Science, Shanghai Dianji University, Shanghai 201306, ChinaSchool of Materials Science, Shanghai Dianji University, Shanghai 201306, ChinaSchool of Materials Science, Shanghai Dianji University, Shanghai 201306, ChinaSchool of Materials Science, Shanghai Dianji University, Shanghai 201306, ChinaCollege of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, ChinaIn this work, the Al-Mo nanocrystalline alloy films with Mo contents ranging from 0–10.5 at.% were prepared via magnetron co-sputtering technology. The composition and microstructure of alloy thin films were studied using XRD, TEM, and EDS. The mechanical behaviors were tested through nanoindentation. The weights of each strengthening factor were calculated and the strengthening mechanism of alloy thin films was revealed. The results indicate that a portion of Mo atoms exist in the Al lattice, forming a solid solution of Mo in Al. The other part of Mo atoms tends to segregate at the grain boundaries, and this segregation becomes more pronounced with an increase in Mo content. There are no compounds or second phases present in any alloy films. As the Mo element content increases, the grain size of the alloy films gradually decreases. The hardness of pure aluminum film is 2.2 GPa. The hardness increases with an increase in Mo content. When the Mo content is 10.5 at.%, The hardness of the film increases to a maximum value of 4.9 GPa. The fine grain (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>g</mi><mi>b</mi></mrow></msub></mrow></semantics></math></inline-formula>), solid solution (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>), and nanocrystalline solute pinning (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>n</mi><mi>c</mi><mo>,</mo><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>) are the three main reasons for the increase in the hardness of alloy thin films. The contribution of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>g</mi><mi>b</mi></mrow></msub></mrow></semantics></math></inline-formula> is the largest, accounting for over 60% of the total, while the contribution of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula> accounts for about 30%, ranking second. The rest of the increase is due to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∆</mo><msub><mrow><mi>H</mi></mrow><mrow><mi>n</mi><mi>c</mi><mo>,</mo><mi>s</mi><mi>s</mi></mrow></msub></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2079-4991/14/24/1990nanocrystallineAl-Mo alloy filmmicrostructuremechanical propertiesstrengthening mechanism |
| spellingShingle | Ying Wang Huanqing Xu Yulan Chen Xiaoben Qi Ning Zhong Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films Nanomaterials nanocrystalline Al-Mo alloy film microstructure mechanical properties strengthening mechanism |
| title | Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films |
| title_full | Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films |
| title_fullStr | Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films |
| title_full_unstemmed | Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films |
| title_short | Research on the Microstructure, Mechanical Properties and Strengthening Mechanism of Nanocrystalline Al-Mo Alloy Films |
| title_sort | research on the microstructure mechanical properties and strengthening mechanism of nanocrystalline al mo alloy films |
| topic | nanocrystalline Al-Mo alloy film microstructure mechanical properties strengthening mechanism |
| url | https://www.mdpi.com/2079-4991/14/24/1990 |
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