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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Anomalous creep behaviour of aluminium high current joint materials
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Anomalous creep behaviour of aluminium high current joint materials

机译：铝大电流接头材料的异常蠕变行为

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During creep deformation the technical aluminium alloys EN AW-1350 (Al99.5) and EN AW-6060 (AlMgSi0.5) under certain conditions of stress and temperature show deformation thrusts of several millimetres, indicating discontinuous dynamic recrystallization. To study this anomalous creep behaviour in more detail the alloys were characterized by global and local texture measurements using neutron and electron backscatter diffraction (EBSD), respectively. In the case of AlMgSi0.5 the main global texture component of the undeformed sample is the cube component. During deformation and dynamic recrystallization a Goss component develops. The grain size slightly decreases with dynamic recrystallization. The normal creep behaviour is characterized by a Norton exponent of 3.8 and an activation energy of 0.5 eV. These parameters indicate that the strain rate controlling process is dislocation creep.
机译：在蠕变变形过程中，技术铝合金EN AW-1350（Al99.5）和EN AW-6060（AlMgSi0.5）在一定的应力和温度条件下显示出数毫米的变形推力，表明不连续的动态重结晶。为了更详细地研究这种异常蠕变行为，分别通过使用中子和电子背散射衍射（EBSD）进行整体和局部织构测量来表征合金。对于AlMgSi0.5，未变形样品的主要整体纹理成分是立方体成分。在变形和动态再结晶过程中，会形成高斯分量。晶粒尺寸随着动态再结晶而略微减小。正常蠕变行为的特征是Norton指数为3.8，活化能为0.5 eV。这些参数表明应变率控制过程是位错蠕变。

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