材料科学
晶界
曲率
晶界扩散系数
动能
倾斜(摄像机)
边界(拓扑)
活化能
晶界强化
职位(财务)
变形(气象学)
铝
凝聚态物理
复合材料
几何学
经典力学
数学分析
微观结构
物理
化学
物理化学
数学
财务
经济
作者
Mitra L. Taheri,Dmitri A. Molodov,Günter Gottstein,Anthony D. Rollett
出处
期刊:International Journal of Materials Research
[De Gruyter]
日期:2005-10-01
卷期号:96 (10): 1166-1170
被引量:2
标识
DOI:10.1515/ijmr-2005-0201
摘要
Abstract Grain boundary mobility has been measured in high-purity aluminum alloyed with 0.03 wt.% Zr using energy stored during plastic deformation as a driving force. In general, the dependence of mobility on grain boundary character was similar to that observed by previous authors with a maximum in mobility in the vicinity of the ∑7 type (38°<111>). The exact location of the mobility maximum varied, however, with temperature in a manner similar to that observed for curvature-driven mobility measurements. Although <111> tilt boundaries exhibit high mobilities in general, the single peak at the ∑7 position at low temperatures changes to a double peak at high temperatures with a local minimum at ∑7. The combination of mobility variation and the thermal activation analysis of the results points to a compensation temperature effect. All these results suggest that grain boundary mobility is a true material property.
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