Compensation effect in grain boundary internal friction

被引：25

作者：

Jiang, W. B. ^{[2
]}

Kong, Q. P. ^{[2
]}

Molodov, D. A. ^{[1
]}

Gottstein, G. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Phys Met & Met Phys, D-52056 Aachen, Germany

[2] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Grain boundary; Internal friction; Compensation effect; Activation enthalpy; MIGRATION; BICRYSTALS; DIFFUSION; ORIENTATION; DEPENDENCE; MECHANISM; PRESSURE; MOBILITY; PURITY; ORIGIN;

D O I：

10.1016/j.actamat.2009.03.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental evidence is provided for the occurrence of the compensation effect, i.e., a linear relationship between the activation enthalpy and the logarithm of the pre-exponential factor, for grain boundary internal friction. The results of internal friction measurements in bicrystals of high purity Al with structurally different grain boundaries were analyzed. The extracted compensation temperature was found to be the same as for grain boundary migration and diffusion Of Solutes along grain boundaries in Al bicrystals. This temperature divides the investigated temperature range of the internal friction peak into two regimes, with different relations between the magnitude of relaxation time and enthalpy of activation, (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3327 / 3331

页数：5

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