Yield strength of "brittle" metallic glass
文献类型：期刊论文
| 作者 | Qu, Ruitao1,2,3; Volkert, Cynthia A.2; Zhang, Zhefeng3; Liu, Feng1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2023-06-20 |
| 卷号 | 149页码:247-254 |
| 关键词 | Metallic glass Yield strength Fracture Shear band Cracking |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2022.12.017 |
| 通讯作者 | Qu, Ruitao(rtqu@nwpu.edu.cn) ; Liu, Feng(liufeng@nwpu.edu.cn) |
| 英文摘要 | "Brittle" metallic glass (MG) usually fractures catastrophically in a shattering mode under macroscopic compression, because cleavage cracking of splitting that originates from extrinsic flaws dominates the failure of such alloys, which brings challenges for studying yield strength. Here we show that the plastic yielding behavior in a brittle Fe-based MG can be successfully activated by decreasing the sample size to micrometer scale to avoid the possible large tensile stress concentrators. The yield strength was found to be at least 33% higher than the fracture strength measured with bulk samples for the present brittle MG. The results further demonstrate that the critical stresses for shear band initiation and propagation are size-independent, while the required stress for cleavage cracking increases with decreasing sample size. The competition of thermodynamic driving forces between the two processes of shear banding and cleavage cracking hence leads to the size-induced brittle-to ductile-transition. These findings clarify the physical nature of the strength of "brittle" MG, implying the great opportunity for using high-strength brittle MGs in devices with small dimensions. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51771205] ; National Natural Science Foundation of China (NSFC)[52271072] ; Natural Science Foundation of Liaoning Province[2020 -MS-011] ; Northwestern Polytechnical Uni- versity ; Northwestern Polytechnical University |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000991812900001 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Natural Science Foundation of Liaoning Province ; Northwestern Polytechnical Uni- versity ; Northwestern Polytechnical University |
| 源URL | [http://ir.imr.ac.cn/handle/321006/177767]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Qu, Ruitao; Liu, Feng |
| 作者单位 | 1.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Ruitao,Volkert, Cynthia A.,Zhang, Zhefeng,et al. Yield strength of "brittle" metallic glass[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,149:247-254. |
| APA | Qu, Ruitao,Volkert, Cynthia A.,Zhang, Zhefeng,&Liu, Feng.(2023).Yield strength of "brittle" metallic glass.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,149,247-254. |
| MLA | Qu, Ruitao,et al."Yield strength of "brittle" metallic glass".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 149(2023):247-254. |
入库方式： OAI收割
来源：金属研究所
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