Knowledge Management System of Institue of Mechanics, CAS
| 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. | |
| Source Publication | Science in China Series E-Technological Sciences
 |
| 1999 | |
| Volume | 42Issue:2Pages:200-206 |
| ISSN | 1006-9321 |
| Abstract | 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. |
| Subject Area | 力学 |
| DOI | 10.1007/BF02917116 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000080183300011 |
| WOS Keyword | SITU TEM OBSERVATION ; DISLOCATION EMISSION ; FRACTURE ; MOTION |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/15691 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Zhou, GH (reprint author), Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China. |
| Recommended Citation 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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