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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.
Source PublicationJournal of University of Science and Technology Beijing
2007
Volume14Pages:8-12
ISSN1005-8850
AbstractLa57.6Al17.5(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.
KeywordBulk Metallic Glass Nanoindentation Serrated Flow Shear Band Plastic-deformation Temperature Behavior Alloy
DOI10.1016/S1005-8850(07)60098-X
Indexed BySCI
Language英语
WOS IDWOS:000250593400003
WOS KeywordPLASTIC-DEFORMATION ; TEMPERATURE ; BEHAVIOR ; ALLOY
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/33877
Collection力学所知识产出(1956-2008)
Corresponding AuthorWei, 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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