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| Critical serrated flow features during nanoindentation in La-based bulk metallic glasses | |
Peng W(彭伟) ; Zhang TH(张泰华); Liu Y(刘渊); Li L(李磊); Wei BC(魏炳忱); Wei, B (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
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| Source Publication | Journal of University of Science and Technology Beijing
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| 2007 | |
| Volume | 14Pages:8-12 |
| ISSN | 1005-8850 |
| Abstract | La57.6Al17.5(Cu,Ni)(24.9) and La64Al14(Cu,Ni)(22) bulk metallic glasses (BMGs) were prepared by copper-mould casting method. Plastic deformation behavior of the two BMGs at various loading rates was studied by nanoindentation. The results showed that the La57.6Al17.5(Cu,Ni)(24.9) BMG with a glass transition temperature of 423 K exhibited prominent serrated flow at low loading rates, whereas less pronounced serrated flow at high rates during nanoindentation. In contrast, the La64Al14(Cu,Ni)(22) BMG with a glass transition temperature of 401 K exhibited prominent serrated flow at high loading rates. The different rate dependency of serrated flow in the two La-based BMGs is related to the different glass transition temperature, and consequently the degree of viscous flow during indentation at room temperature. A smoother flow occurs in the alloy with relatively lower glass transition temperature, due to the relaxation of stress concentration. |
| Keyword | Bulk Metallic Glass Nanoindentation Serrated Flow Shear Band Plastic-deformation Temperature Behavior Alloy |
| DOI | 10.1016/S1005-8850(07)60098-X |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000250593400003 |
| WOS Keyword | PLASTIC-DEFORMATION ; TEMPERATURE ; BEHAVIOR ; ALLOY |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/33877 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Wei, B (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Peng W,Zhang TH,Liu Y,et al. Critical serrated flow features during nanoindentation in La-based bulk metallic glasses[J]. Journal of University of Science and Technology Beijing,2007,14:8-12. |
| APA | 彭伟,张泰华,刘渊,李磊,魏炳忱,&Wei, B .(2007).Critical serrated flow features during nanoindentation in La-based bulk metallic glasses.Journal of University of Science and Technology Beijing,14,8-12. |
| MLA | 彭伟,et al."Critical serrated flow features during nanoindentation in La-based bulk metallic glasses".Journal of University of Science and Technology Beijing 14(2007):8-12. |
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