In situ investigation of liquid Ga penetration in Al bicrystal grain boundaries:: grain boundary wetting or liquid metal embrittlement?

被引：110
作者：
Ludwig, W
Pereiro-López, E
Bellet, D
机构：
[1] Inst Natl Sci Appl, Etud Met Phys & Phys Mat Grp, F-69621 Villeurbanne, France
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Ecole Natl Super Phys Grenoble, Lab Gen Phys & Mecan Mat, F-38402 St Martin Dheres, France
来源：
ACTA MATERIALIA | 2005年 / 53卷 / 01期
关键词：
grain boundary wetting; liquid metal embrittlement; grain boundary penetration; synchrotron radiation; liquid gallium;
D O I：
10.1016/j.actamat.2004.09.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phenomenon of grain boundary penetration (GBP) of liquid Ga along grain boundaries (GB) of Al bicrystals is investigated by synchrotron radiation X-ray microradiography. From the three different types of bicrystals studied. only the one with the highest energy showed GBP in the absence of applied external stress. In situ observations of the penetration process reveal a linear propagation of the penetration front. accompanied by a continuous thickening of the wedge-shaped Ga laver in the GB. The experimental results demonstrate that GBP kinetics are strongly influenced by very weak levels of stress and tend to indicate that such stress may be a prerequisite for the formation of nanometric penetration layers. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码：151 / 162
页数：12
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