J. Mater. Sci. Technol. ›› 1998, Vol. 14 ›› Issue (6): 481-490.

• Reviews •    下一篇

Controversy about the Origin of the Grain Boundary Internal Friction Peak and Its Clarification

T.S.Ke (Tingsui GE)(Lab. of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China)   

  • 收稿日期:1998-11-28 修回日期:1998-11-28 出版日期:1998-11-28 发布日期:2009-10-10

Controversy about the Origin of the Grain Boundary Internal Friction Peak and Its Clarification

T.S.Ke (Tingsui GE)(Lab. of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China)   

  • Received:1998-11-28 Revised:1998-11-28 Online:1998-11-28 Published:2009-10-10

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摘要：

1.IDtroductionEarlyin1947,K6observedaninternalfrictionPeakin99.991%polycrystallineAlbutnotill"single-CryStal"AJ.TforinternalfrictinnpeakaPpearsat285"Cwithafreqencyofvibratiollofo.8Hz.OnthebasisofaSeriesoferperhoentalresultsandcor-relatbeth-icalanalysis,K6consideredthatthisinternalfortionpeakisassociatedwiththeviscousslidingalongorthestressrelaxationacrossthegrainb.undari.[il.TlIisconclusionwa....

Abstract:

In the seventies some scientific workers from France and ltaly suggested that the grain boundary internal friction peak (named the Ke peak in the literature) widely accepted as a grain bound ary process, is originated from the motion of lattice dislocations. Since this problem is one of fundamental importance, this controversy has drawn much international attention. Started from 1982, the Hefei research group made a critical analysis of the large amount of literature concerning this problem and performed a series of crucial experiments to clarify the controversy It is concluded that the irrelevant evidence suggested by the controverters comes from the farfetched interpretation and the mis-identification of the internal friction peaks appeared under various experimental conditions and different states of the specimens.