Liquid metal embrittlement mechanism

doi:10.1007/BF02917116

IMECH-IR > 力学所知识产出(1956-2008)

	Liquid metal embrittlement mechanism
	Zhou GH(周国辉); Liu XM(刘晓敏); Wan FR(万发荣); Qiao LJ(乔利杰); Chu WY(褚武扬); Zhang WQ(张文清); Chen NX(陈难先); Zhou FX(周富信); Zhou, GH (reprint author), Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China.
发表期刊	Science in China Series E-Technological Sciences
	1999
卷号	42 期号:2 页码:200-206
ISSN	1006-9321
摘要	Liquid metal embrittlement was studied in the following two aspects. First the first principle and Chen-Nanxian three-dimensional lattice reverse method were employed to obtain the effective potentials for Al-Ga and Ga-Ga. Then with the molecular dynamics simulation, the influence of liquid metal adsorption on dislocation emission was studied. The simulated result shows that after Ga atoms are adsorbed a the crack plane in Al crystal, the critical stress intensity factor decreases, which changes from 0.5 MPam(1/2) (without adsorption) to 0.4 MPam(1/2) (with adsorption). The reason for the reduction in the critical intensity stress factor is that Ga adsorption reduces the surface energy of the track plane. Moreover, 7075 Al alloy adsorbing liquid metal (Hg + 3 atm % Ga) was in-situ studied in TEM by using a special constant deflection device. The experimental result showed that liquid metal adsorption could facilitate emission, multiplication and motion of dislocations. When this process reached a critical condition, the brittle microcrack was initiated and propagated from the crack tip or in a dislocation free zone.
学科领域	力学
DOI	10.1007/BF02917116
收录类别	SCI
语种	英语
WOS记录号	WOS:000080183300011
关键词[WOS]	SITU TEM OBSERVATION ; DISLOCATION EMISSION ; FRACTURE ; MOTION
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
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://dspace.imech.ac.cn/handle/311007/15691
专题	力学所知识产出(1956-2008)
通讯作者	Zhou, GH (reprint author), Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China.
推荐引用方式 GB/T 7714	Zhou GH,Liu XM,Wan FR,et al. Liquid metal embrittlement mechanism[J]. Science in China Series E-Technological Sciences,1999,42,2,:200-206.
APA	周国辉.,刘晓敏.,万发荣.,乔利杰.,褚武扬.,...&Zhou, GH .(1999).Liquid metal embrittlement mechanism.Science in China Series E-Technological Sciences,42(2),200-206.
MLA	周国辉,et al."Liquid metal embrittlement mechanism".Science in China Series E-Technological Sciences 42.2(1999):200-206.

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