Effect of volume fractions of gradient transition layer on mechanical behaviors of nanotwinned Cu
文献类型：期刊论文
| 作者 | Cheng, Zhao1; Wan, Tao1,2; Bu, Linfeng1,3; Lu, Lei1 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2023 |
| 卷号 | 242页码:12 |
| ISSN号 | 1359-6454 |
| 关键词 | Heterogeneous nanostructured metals Gradient transition layer Strengthening behavior Distribution of GNDs Back stress |
| DOI | 10.1016/j.actamat.2022.118456 |
| 通讯作者 | Lu, Lei(llu@imr.ac.cn) |
| 英文摘要 | Heterogeneous nanostructured (HNS) materials, such as gradient and laminated nanostructured metals, possess superior mechanical properties with respect to their homogeneous counterparts. The additional strengthening mechanism of HNS is mainly attributed to the non-uniform plastic deformation induced by gradient transition layers (GTLs) between components. Here, we designed three gradient nanotwinned (GNT) Cu samples with different volume fractions of GTLs ( f g ) of 10%, 50% and 100% while the rule-ofmixture strength and overall structural gradient are constant to quantitatively reveal its effect on the extra strengthening behaviors. As f g increases, the yield strength is improved and the elastic to plastic stage is prolonged at small strain. Moreover, larger f g suppresses the strain localization and reduces nucleation of cracks at larger strain, accompanied by more widely distributed geometrically necessary dislocations (GNDs) and more bundles of concentrated dislocations (BCDs), thus improving the elongation. Stress partitioning analysis and numerical simulations show that the more widely-distributed GNDs at larger f g result in higher overall back stresses but hardly affect effective stresses, indicative of the origin of the improved strengthening. Such GND-distribution dominated strengthening mechanism paves a fundamental way for developing higher-performance HNS materials.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51931010] ; National Natural Science Foundation of China (NSFC)[92163202] ; National Natural Science Foundation of China (NSFC)[52001312] ; Key Research Program of Frontier Science and International partnership program[GJHZ2029] ; China Postdoctoral Science Foundation[BX20190336] ; China Postdoctoral Science Foundation[2019M661150] ; IMR Innovation Fund[2021-PY02] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000899578000004 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Key Research Program of Frontier Science and International partnership program ; China Postdoctoral Science Foundation ; IMR Innovation Fund |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175557]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu, Lei |
| 作者单位 | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, CAS Ctr Excellence Complex Syst Mech, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Zhao,Wan, Tao,Bu, Linfeng,et al. Effect of volume fractions of gradient transition layer on mechanical behaviors of nanotwinned Cu[J]. ACTA MATERIALIA,2023,242:12. |
| APA | Cheng, Zhao,Wan, Tao,Bu, Linfeng,&Lu, Lei.(2023).Effect of volume fractions of gradient transition layer on mechanical behaviors of nanotwinned Cu.ACTA MATERIALIA,242,12. |
| MLA | Cheng, Zhao,et al."Effect of volume fractions of gradient transition layer on mechanical behaviors of nanotwinned Cu".ACTA MATERIALIA 242(2023):12. |
入库方式： OAI收割
来源：金属研究所
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