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Micro-mechanical behavior of porous tungsten/Zr-based metallic glass composite under cyclic compression
Zhang, X. Q.; Xue, Y. F.; Wang, L.; Fan, Q. B.; Nie, Z. H.; Zhang, H. F.; Fu, H. M.; xueyunfei@bit.edu.cn
2015
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume643Pages:55-63
AbstractThe micro-mechanical behavior of porous tungsten/Zr-based metallic glass composites with different tungsten volume fraction was investigated under cyclic compression by synchrotron-based in-situ high-energy X-ray diffraction (HEXRD) and finite element modeling (FEM). During cyclic compression, the dislocation in the tungsten phase tangled near the interfaces, indicating that the elastic metallic glass phase restricted dislocation motion and obstructed the deformation of the tungsten phase because of the heterogeneity in stress. After the metallic glass phase yielded, the dislocation tended to propagate away from the interfaces, showing the decrease of the interphase stress affected the direction of motion in the dislocations. The tungsten phase exhibited increased yield strength with the increase of cyclic loading number. Yield stress of the tungsten phase decreased with increasing the tungsten volume fraction during cyclic compression, which was influenced by the elastic strain mismatch between the two phases. The stress heterogeneity and the stress distribution difference between the two phases resulted in that the yield strength of the metallic glass phase decreased with the increase of tungsten volume fraction, and accelerated the formation of shear bands in the metallic glass phase as well as cracks in the tungsten phase. The heterogeneity in stress also excessed the interface bonding strength, inducing interface fracture near interfaces. (C) 2015 Elsevier B.V. All rights reserved.
description.department[zhang, x. q. ; xue, y. f. ; wang, l. ; fan, q. b. ; nie, z. h.] beijing inst technol, sch mat sci & engn, beijing 100081, peoples r china ; [zhang, h. f. ; fu, h. m.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
KeywordMetallic Glass Composite Micro-mechanical Behavior Finite Element Analysis (Fea) High Energy X-ray Diffraction (Hexrd)
Funding OrganizationNational Natural Science Foundation of China [51471035, 51101018]; Hundred Talents Program of the Chinese Academy of Sciences; Beijing Higher Education Young Elite Teacher Project; US Department of Energy, Office of Science Laboratory
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74966
Collection中国科学院金属研究所
Corresponding Authorxueyunfei@bit.edu.cn
Recommended Citation
GB/T 7714
Zhang, X. Q.,Xue, Y. F.,Wang, L.,et al. Micro-mechanical behavior of porous tungsten/Zr-based metallic glass composite under cyclic compression[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,643:55-63.
APA Zhang, X. Q..,Xue, Y. F..,Wang, L..,Fan, Q. B..,Nie, Z. H..,...&xueyunfei@bit.edu.cn.(2015).Micro-mechanical behavior of porous tungsten/Zr-based metallic glass composite under cyclic compression.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,643,55-63.
MLA Zhang, X. Q.,et al."Micro-mechanical behavior of porous tungsten/Zr-based metallic glass composite under cyclic compression".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 643(2015):55-63.
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