On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation
On the fracture toughness of bulk metallic glasses under Berkovich nanoindentation
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Berkovich纳米压痕下大块金属玻璃的断裂韧性研究
DOI：
10.1016/j.jnoncrysol.2017.11.008
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发表时间：
2018-02
影响因子：
3.5
通讯作者：
Wang J.Q.
中科院分区：
文献类型：
--
作者：
Guo H.;Jiang C.H.;Yang B.J.;Wang J.Q.
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 valuesKCobtained from the indentation tests agreed well with thoseKQfrom the CTOD tests within an approximately relative difference of 10%. We also found thatKQlinearly correlates withKC(KQ= 1.1KC− 3.7). The value ofKQin Al-based BMG is predicted to be ~ 35 MPa √ m.
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影响因子：
8.6
作者：
Guan, Pengfei;Lu, Shuo;Falk, Michael L.
通讯作者：
Falk, Michael L.
DOI：
10.1016/j.scriptamat.2010.12.047
发表时间：
2011-04
期刊：
Scripta Mater.
影响因子：
--
作者：
徐坚
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徐坚
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影响因子：
9.8
作者：
J.C. Qiao;Y. Yao;J.M. Pelletier;L.M. Keer
通讯作者：
L.M. Keer
DOI：
10.1063/1.329930
发表时间：
1980-11
期刊：
--
影响因子：
--
作者：
S. Chiang;D. Marshall;A. Evans
通讯作者：
S. Chiang;D. Marshall;A. Evans
DOI：
10.1007/bf02665497
发表时间：
1989-08
期刊：
Metallurgical Transactions A
影响因子：
--
作者：
A. Alpas;L. Edwards;C. Reid
通讯作者：
A. Alpas;L. Edwards;C. Reid