The rheological behavior of brittle BMGs of Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 in the supercooled liquid region
文献类型：期刊论文
| 作者 | Wang, Rujie1,2; Yao, Huaxin1,3; Wang, Engang1,2; Shen, Yong4; Jia, Peng1,3 |
| 刊名 | JOURNAL OF NON-CRYSTALLINE SOLIDS
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| 出版日期 | 2024-12-15 |
| 卷号 | 646页码:8 |
| 关键词 | Amorphous alloy Supercooled liquid region Thermoplastic deformation Superplasticity |
| ISSN号 | 0022-3093 |
| DOI | 10.1016/j.jnoncrysol.2024.123210 |
| 通讯作者 | Shen, Yong(yongshen@imr.ac.cn) ; Jia, Peng(pjia@epm.neu.edu.cn) |
| 英文摘要 | Bulk metallic glasses (BMGs) show limited plasticity at room temperature. However, BMGs usually exhibit superplasticity and high plastic forming ability in their supercooled liquid region (SLR). The rheological behavior of BMGs in SLR is vitally important to their thermoplastic forming process. In contrast to the ductile BMGs, thermoplastic deformation behavior of brittle BMGs is rarely reported. In present work, the rheological behavior of two brittle BMGs with high glass forming ability Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 was investigated on Gleeble3500. The two BMGs can deform homogeneously depending on the temperature and strain rate. According to the high value of m (strain rate sensitivity index), which is the most important mechanical characteristic of a superplastic material, the two BMGs show superplasticity in their SLR with m >= 0.3. Based on the free volume model, their activation volumes are calculated as 0.263 similar to 0.486 nm(3) and 1.261 similar to 1.650 nm(3), indicating the minimum displacement clusters with average 26 similar to 48 and 91 similar to 127 atoms, for Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7, respectively. Thus, the two investigated brittle BMGs can be thermoplastic processed in the SLR and the deformation maps are given. BMG Cu44.25Ag14.75Zr36Ti5 shows better machinable property than Ti32.8Zr30.2Cu9Ni5.3Be22.7. Compared to the ductile BMGs, no Newtonian flow is found for the two investigated brittle BMGs. |
| 资助项目 | National Nat-ural Science Foundation of China[52371021] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001311362700001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Nat-ural Science Foundation of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Shen, Yong; Jia, Peng |
| 作者单位 | 1.Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China 2.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 4.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Rujie,Yao, Huaxin,Wang, Engang,et al. The rheological behavior of brittle BMGs of Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 in the supercooled liquid region[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2024,646:8. |
| APA | Wang, Rujie,Yao, Huaxin,Wang, Engang,Shen, Yong,&Jia, Peng.(2024).The rheological behavior of brittle BMGs of Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 in the supercooled liquid region.JOURNAL OF NON-CRYSTALLINE SOLIDS,646,8. |
| MLA | Wang, Rujie,et al."The rheological behavior of brittle BMGs of Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 in the supercooled liquid region".JOURNAL OF NON-CRYSTALLINE SOLIDS 646(2024):8. |
入库方式： OAI收割
来源：金属研究所
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