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Characterization of Shear Banding in La-Based Bulk Metallic Glasses Through Indentation
Peng W(彭伟); Wei BC(魏炳忱); Zhang TH(张泰华); Liu Y(刘渊); Li L(李磊); Wei, B (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
Source PublicationMATERIALS TRANSACTIONS
2007
Volume48Issue:7Pages:1759-1764
ISSN1345-9678
AbstractLa64Al14(Cu,Ni)(22), La(63.1)All(5.2)(Cu,Ni)(21.7), La57.6Al17.5(Cu,Ni)(24.9), and La55Al25Cu10Ni5Co5 bulk metallic glasses (BMGs) with low glass transition temperature (T-g) were prepared by copper-mould casting method. The homologous temperature (the ratio of room temperature to T-g) of the four BMGs ranges from 0.64 to 0.73. Plastic deformation behavior of the BMGs at various loading rates was studied by nanoindentation. The results showed that the loading rate dependency of serrated flow, which is related to the nucleation and propagation of shear bands, depends strongly on the homologous temperature. The alloys with relatively high homologous temperature exhibit an increase in flow serration with increasing loading rate. whereas. the alloys with low homologous temperature exhibit prominent serrations at low rates. No distinct shear band is observed around the indents for all alloys after nanoindentation at all the studied loading rates. Alternately, shear band pattern are characterized through macro-indentation. which shows that shear band spacing decreases with the increase of the homologous temperature.
KeywordBulk Metallic Glass Plastic Deformation Shear Band Nanoindentation
DOI10.2320/matertrans.MJ200761
Indexed BySCI
Language英语
WOS IDWOS:000248743100038
WOS KeywordINSTRUMENTED INDENTATION ; PLASTIC-DEFORMATION ; FLOW ; NANOINDENTATION ; ALLOY
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58448
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,Wei BC,Zhang TH,et al. Characterization of Shear Banding in La-Based Bulk Metallic Glasses Through Indentation[J]. MATERIALS TRANSACTIONS,2007,48(7):1759-1764.
APA 彭伟,魏炳忱,张泰华,刘渊,李磊,&Wei, B .(2007).Characterization of Shear Banding in La-Based Bulk Metallic Glasses Through Indentation.MATERIALS TRANSACTIONS,48(7),1759-1764.
MLA 彭伟,et al."Characterization of Shear Banding in La-Based Bulk Metallic Glasses Through Indentation".MATERIALS TRANSACTIONS 48.7(2007):1759-1764.
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