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On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation
Guo, H; Jiang, CB; Yang, BJ; Wang, JQ; Wang, JQ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2018-02-01
Source PublicationJOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN0022-3093
Volume481Pages:321-328
AbstractMeasurements of fracture toughness from the crack tip opening displacement (CTOD) testing methods are complex and paramount important for a range of bulk metallic glasses (BMGs). In this work, we attempted to propose an indentation protocol to evaluate indentation fracture toughness based on two key considerations: First, the plastic deformation induced damage to the characteristic fracture initiation point calculated from integrating the indentation load-displacement curves is obtained and used to estimate indentation fracture toughness. Second, the continuum damage mechanics theory has been adopted to identify the characteristic fracture initiation point. To verify the applicability of the suggested approach, fracture toughness values of BMGs were estimated and compared with those from CTOD tests in the literature. The estimated fracture toughness values Kc obtained from the indentation tests agreed well with those K-Q from the CTOD tests within an approximately relative difference of 10%. We also found that K9 linearly correlates with K-C (K-Q = 1.1K(C) - 3.7). The value of K-Q in Al-based BMG is predicted to be similar to 35 MPa root m.; Measurements of fracture toughness from the crack tip opening displacement (CTOD) testing methods are complex and paramount important for a range of bulk metallic glasses (BMGs). In this work, we attempted to propose an indentation protocol to evaluate indentation fracture toughness based on two key considerations: First, the plastic deformation induced damage to the characteristic fracture initiation point calculated from integrating the indentation load-displacement curves is obtained and used to estimate indentation fracture toughness. Second, the continuum damage mechanics theory has been adopted to identify the characteristic fracture initiation point. To verify the applicability of the suggested approach, fracture toughness values of BMGs were estimated and compared with those from CTOD tests in the literature. The estimated fracture toughness values Kc obtained from the indentation tests agreed well with those K-Q from the CTOD tests within an approximately relative difference of 10%. We also found that K9 linearly correlates with K-C (K-Q = 1.1K(C) - 3.7). The value of K-Q in Al-based BMG is predicted to be similar to 35 MPa root m.
description.department[guo, h. ; jiang, c. b. ; yang, b. j. ; wang, j. q.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [guo, h.] univ chinese acad sci, beijing 100049, peoples r china
KeywordElastic-plastic Indentation Fatigue-crack-propagation Instrumented Indentation Mechanical-properties Vickers Indentation Damage Mechanics Ductile Fracture Shear-band Model Initiation
Subject AreaMaterials Science, Ceramics ; Materials Science, Multidisciplinary
Funding OrganizationNational Key Research and Development Program of China [2016YFB1100204]; National Natural Science Foundation of China [51131006, 51471166]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79547
Collection中国科学院金属研究所
Corresponding AuthorWang, JQ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Guo, H,Jiang, CB,Yang, BJ,et al. On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2018,481:321-328.
APA Guo, H,Jiang, CB,Yang, BJ,Wang, JQ,&Wang, JQ .(2018).On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation.JOURNAL OF NON-CRYSTALLINE SOLIDS,481,321-328.
MLA Guo, H,et al."On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation".JOURNAL OF NON-CRYSTALLINE SOLIDS 481(2018):321-328.
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