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Fatigue damage and fracture behavior of metallic glass under cyclic compression
Wang, XD; Qu, RT; Wu, SJ; Liu, ZQ; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2018-02-21
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume717Pages:41-47
AbstractA comprehensive understanding on the fatigue behavior of metallic glasses (MGs) is of vital importance for their structural applications. Here we present a systematic study on the fatigue damage and fracture behavior of. a Zr52.5Cu17.9Ni14.6Al10Ti5 MG under cyclic compression of different stress levels, with the assistance of 3D X-ray tomography (XRT) and 2D scanning electron microscope to examine the origins of fatigue cracks. The results indicate that the fatigue fracture mode of the MG depends strongly on the stress level in such a manner similar to that of high-strength steels. The MG exhibits shear fracture along shear band under high cyclic stress level, just like the case for monotonic compression; under low cyclic stress level, in contrast, the fracture is dominated by splitting where the fatigue cracks originate from extrinsic defects. The increased propensity for cavitation and cracking under low stress level, as revealed by XRT, suggests a reduced resistance of the MG to cleavage failure which eventually leads to the transition of the fatigue fracture mode. The results support the idea that the fatigue performance of MGs can be improyed by reducing the extrinsic defects and properly controlling the shear banding behavior.; A comprehensive understanding on the fatigue behavior of metallic glasses (MGs) is of vital importance for their structural applications. Here we present a systematic study on the fatigue damage and fracture behavior of. a Zr52.5Cu17.9Ni14.6Al10Ti5 MG under cyclic compression of different stress levels, with the assistance of 3D X-ray tomography (XRT) and 2D scanning electron microscope to examine the origins of fatigue cracks. The results indicate that the fatigue fracture mode of the MG depends strongly on the stress level in such a manner similar to that of high-strength steels. The MG exhibits shear fracture along shear band under high cyclic stress level, just like the case for monotonic compression; under low cyclic stress level, in contrast, the fracture is dominated by splitting where the fatigue cracks originate from extrinsic defects. The increased propensity for cavitation and cracking under low stress level, as revealed by XRT, suggests a reduced resistance of the MG to cleavage failure which eventually leads to the transition of the fatigue fracture mode. The results support the idea that the fatigue performance of MGs can be improyed by reducing the extrinsic defects and properly controlling the shear banding behavior.
description.department[wang, x. d. ; qu, r. t. ; wu, s. j. ; liu, z. q. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [wang, x. d. ; zhang, z. f.] univ chinese acad sci, 19 a yuquan rd, beijing 100049, peoples r china
KeywordCrack-growth-behavior Shear-band Propagation Dynamics Simulations Strength Mechanism Evolution Endurance Failure Alloys Steels
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51771205, 51331007, 51501190]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79491
Collection中国科学院金属研究所
Corresponding AuthorQu, RT; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, XD,Qu, RT,Wu, SJ,et al. Fatigue damage and fracture behavior of metallic glass under cyclic compression[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,717:41-47.
APA Wang, XD,Qu, RT,Wu, SJ,Liu, ZQ,Zhang, ZF,&Zhang, ZF .(2018).Fatigue damage and fracture behavior of metallic glass under cyclic compression.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,717,41-47.
MLA Wang, XD,et al."Fatigue damage and fracture behavior of metallic glass under cyclic compression".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 717(2018):41-47.
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