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Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers
Zhang, Yurong1,5; Zhang, Zhenjun2; Wu, Junru3; Liu, Yalu1; Zhang, Mingjun4; Yang, Chenglin2; He, Min1; Gong, Xiaobo4; Zhang, Zhefeng2; Wang, Zhibiao1; Li, Faqi1
Corresponding AuthorLi, Faqi(lifq@cqmu.edu.cn)
2020-11-01
Source PublicationULTRASONICS SONOCHEMISTRY
ISSN1350-4177
Volume68Pages:10
AbstractThe near-solid wall mull-bubble cavitation is an extremely complex phenomenon, and cavitation has strong erosiveness. The melting point (about 3410 degrees C) of tungsten is highest among all pure metals, and its hardness is also very high (its yield strength is greater than 1 GPa). What would happen to pure tungsten wire under extreme conditions caused by collapsing cavitation bubbles at high hydrostatic pressure? In this paper, we have studied the fracture process of pure tungsten wire with diameter of 0.2 mm mounted at the focus of a standing acoustic wave produced by a spherical cavity transducer with two open ends placed in a near spherical pressure container, and also studied the macro and micro morphological characteristics of the fracture and the surface damage at different fracture stages of tungsten wire under various hydrostatic pressures and driving electric powers. The results have shown that the fracture time of tungsten wire is inversely proportional to aviation intensity with hydrostatic pressure and driving electric power, the higher the acoustic pressure caused by higher electric power, the shorter the fracture time. The possible fracture mechanisms of tungsten wire in this situation we found mainly contributed to asymmetrically bubbles collapse near the surface of tungsten wire, leading to tearing the surface apart; consequently cracks along the radial and axial directions of a tungsten wire extend simultaneously, classified as trans-granular fracture and inter-granular fracture, respectively. With the increase of cavitation intensity, the cracks tend to extend more radially and the axial crack propagation path becomes shorter, that is, mainly for trans-granular fracture; with the decrease of cavitation intensity, intergranular fracture becomes more obvious. When the hydrostatic pressure was 10 MPa and the driving electric power was 2 kW, the fibers became softener due to the fracture of the tungsten wire. The fracture caused by acoustic cavitation was different from conventional mechanical fracture, such as tensile, shear, fatigue fracture, on macro and micro morphology.
KeywordAcoustic cavitation Hydrostatic pressure Cavitation erosion Fracture of tungsten wire
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.ultsonch.2020.105232
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[81127901] ; National Natural Science Foundation of China[11574039] ; National Natural Science Foundation of China[51331007]
WOS Research AreaAcoustics ; Chemistry
WOS SubjectAcoustics ; Chemistry, Multidisciplinary
WOS IDWOS:000554511700044
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140040
Collection中国科学院金属研究所
Corresponding AuthorLi, Faqi
Affiliation1.Chongqing Med Univ, Coll Biomed Engn, State Key Lab Ultrasound Med & Engn, Chongqing 400016, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Univ Vermont, Burlington, VT 05405 USA
4.Natl Engn Res Ctr Ultrasound Med, Chongqing 401121, Peoples R China
5.Zhengzhou Univ, Dept Radiol, Affiliated Hosp 1, Zhengzhou, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yurong,Zhang, Zhenjun,Wu, Junru,et al. Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers[J]. ULTRASONICS SONOCHEMISTRY,2020,68:10.
APA Zhang, Yurong.,Zhang, Zhenjun.,Wu, Junru.,Liu, Yalu.,Zhang, Mingjun.,...&Li, Faqi.(2020).Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers.ULTRASONICS SONOCHEMISTRY,68,10.
MLA Zhang, Yurong,et al."Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers".ULTRASONICS SONOCHEMISTRY 68(2020):10.
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