On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation

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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
发表期刊	JOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN	0022-3093
卷号	481 页码:321-328
摘要	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.; 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.
部门归属	[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
关键词	Elastic-plastic Indentation Fatigue-crack-propagation Instrumented Indentation Mechanical-properties Vickers Indentation Damage Mechanics Ductile Fracture Shear-band Model Initiation
学科领域	Materials Science, Ceramics ; Materials Science, Multidisciplinary
资助者	National Key Research and Development Program of China [2016YFB1100204]; National Natural Science Foundation of China [51131006, 51471166]
收录类别	SCI
语种	英语
WOS记录号	WOS:000423646200045
引用统计	被引频次：39[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79547
专题	中国科学院金属研究所
通讯作者	Wang, JQ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 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.