Mechanically Driven Migration of <100> Tilt Grain Boundaries in Al-Bicrystals
Mechanically Driven Migration of <100> Tilt Grain Boundaries in Al-Bicrystals
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铝双晶中 <100> 倾斜晶界的机械驱动迁移
DOI：
10.4028/www.scientific.net/msf.558-559.927
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
G. Gottstein
中科院分区：
文献类型：
--
作者：
D. Molodov;Tatiana Gorkaya;G. Gottstein
测量了铝双晶中应力引起的平面晶界迁移。研究了对称的<100>的倾斜晶界，取向角在5.7°~ 17.8°之间。在剪切应力下的边界迁移被观察到与晶粒的横向移动理想地耦合在一起。所测得的法向边界运动与颗粒横向位移的比值与各自的边界几何形状非常吻合。测定了晶界迁移率的温度依赖性，确定了相应的活化参数。边界迁移激活焓在取向偏差范围内与取向偏差角无关，为H=1.44 eV。
The stress induced migration of planar grain boundaries in aluminium bicrystals was measured. Symmetrical <100> tilt grain boundaries with misorientation angles in the range between 5.7° and 17.8° were examined. Boundary migration under a shear stress was observed to be ideally coupled to the lateral translation of grains. The measured ratios of the normal boundary motion to the lateral displacement of grains are in an excellent agreement with the respective boundary geometry. The temperature dependence of grain boundary mobility was measured, and the corresponding activation parameters were determined. The activation enthalpy of boundary migration was found to be independent of misorientation angle in the investigated misorientation range and amounts to H=1.44 eV.