|How does the initial free volume distribution affect shear band formation in metallic glass?|
|Chen Y(陈艳); Jiang MQ(蒋敏强); Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
|Source Publication||Science China-Physics Mechanics & Astronomy
|Abstract||Introducing heterogeneities into the structure is an effective way to enhance the plasticity in metallic glasses (MGs). As natural heterogeneity, the original randomly distributed free volume in MGs has been found to be in favor of plasticity. However, the exact correlation between the free volume distribution and mechanical response is still unclear. In this paper, we investigate the shear banding in MGs with different structural disorders, characterized by both the free volume concentration (FVC) and the free volume dispersion (FVD). It is found that, either high FVC or wide FVD leads to low activation stress of shear band; wide FVD promotes the multiplication of shear bands but high FVC restricts it. It reveals that the yield strength in MGs is dependent on the amount of free volume while the plasticity mainly relies on the distribution. An optimum combination of the two aspects probably helps to design a MG of both good plasticity and high strength.|
|WOS Keyword||INHOMOGENEOUS DEFORMATION
|WOS Research Area||Physics
|WOS Subject||Physics, Multidisciplinary
|Funding Organization||This work was supported by the National Natural Science Foundation of China (Grants Nos. 10725211, 11002144, 11021262), the National Natural Science Foundation of China-NSAF (Grant No. 10976100), the National Key Basic Research Program of China (Grant No. 2009CB724401) and the Key Project of Chinese Academy of Sciences (Grant No. KJCX2-YW-M04).
|Corresponding Author||Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China|
Chen Y,Jiang MQ,Dai LH,et al. How does the initial free volume distribution affect shear band formation in metallic glass?[J]. Science China-Physics Mechanics & Astronomy,2011,54(8):1488-1494.
陈艳,蒋敏强,戴兰宏,&Dai, LH .(2011).How does the initial free volume distribution affect shear band formation in metallic glass?.Science China-Physics Mechanics & Astronomy,54(8),1488-1494.
陈艳,et al."How does the initial free volume distribution affect shear band formation in metallic glass?".Science China-Physics Mechanics & Astronomy 54.8(2011):1488-1494.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.