Shear banding mode transformation induced strong strain delocalization in amorphous CuTa alloy with nanolayered structure
文献类型：期刊论文
| 作者 | Zhang, Chun2,3,4; Jiang MQ(蒋敏强)1 ; Chen, Shaohua2,3,4; Li, Jianjun1,2,3
|
| 刊名 | MATERIALS TODAY COMMUNICATIONS
 |
| 出版日期 | 2025-06-01 |
| 卷号 | 46页码:14 |
| 关键词 | Metallic glasses Amorphous/amorphous interface Hardness Shear banding Strain delocalization |
| DOI | 10.1016/j.mtcomm.2025.112792 |
| 通讯作者 | Chen, Shaohua(shchen@bit.edu.cn) ; Li, Jianjun(jianjunli.mech@hotmail.com) |
| 英文摘要 | Metallic glasses possess ultra-high strength but negligible plasticity due to the shear banding induced strong strain localization. A feasible route to alleviate the strength-plasticity dilemma is to introducing amorphous/ amorphous interfaces (A/AIs) to suppress the strain localization. However, the existing studies are mainly focused on the heterogeneous A/AIs that are made by different material systems in different constituent layers. In this paper, a new route has been proposed to suppress the shear banding induced strain localization of amorphous materials by introducing a high density of homogeneous A/AIs in an amorphous CuTa alloy. The homogeneous A/AIs are produced by varying the elemental concentration of Cu and Ta in the neighboring CuTa layers to form a CuTa/CuTa nanolayered glass (NLG) structure. The layer thickness dependent (h varies from 100 to 5 nm) strengthening and shear banding behavior of the CuTa NLGs were systematically investigated by nano/ micro-indentations and the development of a theoretical model to quantify the shear banding induced strain localization. The indented deformation was discovered to transform from a few intense clockwise-kinking mediated severe cutting-like shear bands that produce a maximum effective strain of 2.21 at large h to a large amount of slight counter-clockwise-kinking accommodated minor ones with an order of magnitude lower effective strain (0.49) at small h, in which the latter leads to a complete elimination of the macro shear banding in the indented surface. The above shear banding mode transition is attributed to the competition between the flow stress of the layered structure and the intra-layer shear band nucleation stress. The present work provides a simple way for designing strong and ductile amorphous materials by architecting homogeneous A/AIs to achieve strong strain delocalization in nanoscale. |
| 分类号 | 二类 |
| WOS关键词 | METALLIC-GLASS ; MECHANICAL-PROPERTIES ; PHASE-SEPARATION ; ATOMIC-STRUCTURE ; SIZE-REDUCTION ; DEFORMATION ; PLASTICITY ; STRENGTH ; TRANSITION ; STABILITY |
| 资助项目 | National Natural Science Foundation of China (NSFC)[12272413] ; National Natural Science Foundation of China (NSFC)[12032004] ; National Natural Science Foundation of China (NSFC)[12293002] ; Natural Science Foundation of Hunan Province[2025JJ20010] ; Project of State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Central South University[ZZYJKT2024-11] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001501701800006 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Natural Science Foundation of Hunan Province ; Project of State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Central South University ; Opening Fund of State Key Laboratory of Nonlinear Mechanics |
| 其他责任者 | Chen, Shaohua，Li, Jianjun |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101766]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Cent South Univ, State Key Lab Precis Mfg Extreme Serv Performance, Changsha 410083, Hunan, Peoples R China; 3.Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China; 4.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Chun,Jiang MQ,Chen, Shaohua,et al. Shear banding mode transformation induced strong strain delocalization in amorphous CuTa alloy with nanolayered structure[J]. MATERIALS TODAY COMMUNICATIONS,2025,46:14. |
| APA | Zhang, Chun,蒋敏强,Chen, Shaohua,&Li, Jianjun.(2025).Shear banding mode transformation induced strong strain delocalization in amorphous CuTa alloy with nanolayered structure.MATERIALS TODAY COMMUNICATIONS,46,14. |
| MLA | Zhang, Chun,et al."Shear banding mode transformation induced strong strain delocalization in amorphous CuTa alloy with nanolayered structure".MATERIALS TODAY COMMUNICATIONS 46(2025):14. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。