Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers

doi:10.1016/j.ultsonch.2020.105232

IMR OpenIR

	Study on fracture of tungsten wire induced by acoustic cavitation at different hydrostatic pressures and driving electric powers
	Zhang, Yurong 1,5; Zhang, Zhenjun 2; Wu, Junru 3; Liu, Yalu 1; Zhang, Mingjun 4; Yang, Chenglin 2; He, Min 1; Gong, Xiaobo 4; Zhang, Zhefeng 2; Wang, Zhibiao 1; Li, Faqi 1
通讯作者	Li, Faqi(lifq@cqmu.edu.cn)
	2020-11-01
发表期刊	ULTRASONICS SONOCHEMISTRY
ISSN	1350-4177
卷号	68 页码:10
摘要	The 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.
关键词	Acoustic cavitation Hydrostatic pressure Cavitation erosion Fracture of tungsten wire
资助者	National Natural Science Foundation of China
DOI	10.1016/j.ultsonch.2020.105232
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[81127901] ; National Natural Science Foundation of China[11574039] ; National Natural Science Foundation of China[51331007]
WOS研究方向	Acoustics ; Chemistry
WOS类目	Acoustics ; Chemistry, Multidisciplinary
WOS记录号	WOS:000554511700044
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/140043
专题	中国科学院金属研究所
通讯作者	Li, Faqi
作者单位	1.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
推荐引用方式 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.