Knowledge Management System Of Institute of metal research，CAS
| Microscopic stresses in carbon nanotube reinforced aluminum matrix composites determined by in-situ neutron diffraction | |
| Zhang, X. X.; Zhang, J. F.; Liu, Z. Y.; Gan, W. M.; Hofmann, M.; Andrae, H.; Xiao, B. L.; Ma, Z. Y. | |
| 2020-10-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| Volume | 54Pages:58-68 |
| Abstract | One of the most desired strengthening mechanisms in the carbon nanotube reinforced aluminum matrix composites (CNT/Al) composites is the load transfer strengthening mechanism (LTSM). However, a fundamental issue concerning the LTSM is that quantitative measurements of load partitioning in these composites during loading are very limited. In this study, in-situ neutron diffraction study on the tensile deformation of the 3 vol.% CNT/2009Al composite and the unreinforced 2009Al alloy was conducted. The {311} and {220} diffraction elastic constants (DECs) of the 2009Al alloy were determined. Using those DECs the average stress in the 2009Al matrix of the composite was calculated. Then the average stress in the CNTs was separated by using the stress equilibrium condition. Computational homogenization models were also applied to explain the stress evolution in each phase. Predicted results agree with experimental data. In the present case, the average stress in the CNTs reaches 1630 MPa at the yield strength of the composite based on linear regression of the measured data, which leads to an increment of yield strength by about 37 MPa. As the result of this work, an approach to quantify load partitioning in the CNTs is developed for the CNT/Al composites, which can be applied to optimize the mechanical properties of the composites.(C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| DOI | 10.1016/j.jmst.2020.04.016 |
| WOS ID | WOS:000545310500007 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/82497 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zhang, X. X.,Zhang, J. F.,Liu, Z. Y.,et al. Microscopic stresses in carbon nanotube reinforced aluminum matrix composites determined by in-situ neutron diffraction[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,54:58-68. |
| APA | Zhang, X. X..,Zhang, J. F..,Liu, Z. Y..,Gan, W. M..,Hofmann, M..,...&Ma, Z. Y..(2020).Microscopic stresses in carbon nanotube reinforced aluminum matrix composites determined by in-situ neutron diffraction.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,54,58-68. |
| MLA | Zhang, X. X.,et al."Microscopic stresses in carbon nanotube reinforced aluminum matrix composites determined by in-situ neutron diffraction".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 54(2020):58-68. |
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