Acta Metallurgica Sinica (English Letters) ›› 2000, Vol. 13 ›› Issue (2): 540-545.

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INFLUENCE OF A MISORIENTATION ANGLE ON AN ENERGR OF THE SYMMETRIC GRAIN BOUNDARY IN FCC METALS

M. D. Starostenkov, B. F. Demyanov and A. V. Weckman General Physics Department, Altai State Technical University, Lenin st., 46, Barnaul, 656099, Russia   

  • 收稿日期:2000-04-25 修回日期:2000-04-25 出版日期:2000-04-25 发布日期:2009-10-10

INFLUENCE OF A MISORIENTATION ANGLE ON AN ENERGR OF THE SYMMETRIC GRAIN BOUNDARY IN FCC METALS

M. D. Starostenkov, B. F. Demyanov and A. V. Weckman General Physics Department, Altai State Technical University, Lenin st., 46, Barnaul, 656099, Russia   

  • Received:2000-04-25 Revised:2000-04-25 Online:2000-04-25 Published:2009-10-10

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摘要： 1. ~notionDislocation models for describing of grain boundaries (GBs) of common ac are usedfreqUently. They describe an energy 9 structure and physical and mechAncal properties of lowangle GBs very well. aam angle GB can be considered as a wall of dislocations located onidentical distances from each other. The dependence Of GB enemy from drisorientation angleat low angles is represented by an....

Abstract: In the present work the research of grain boundary (CB) energy versus angle of misorientation in fcc metals Al, Cu, An and Ni was carried out. An axis of CB misorientation is a direction [100], angle of misorientation makes from 2皍p in 23*. The interatomic interaction was opproximated by Morse' s pair semi-empirical potential. Two variants of relaxation technique were used: (1) rigid relax- ation with the change of atom quantity per a GB (vacancy relaxation ) and (2) full atomic relaxation by a molecular static method. The obtained orientation dependence has a good agreement with experi- ment. There are cusps on a curve in the range of special GB angles.The comparison of obtained curves with calculated ones in model Van der Merwe was carried out. Dependencies obtained in our investiga- tions are not smooth and have an oscillatory character. The oscillations reflect a discrete structure of a lattice.

Key words: FCC metal, misorientation angle, boumdary energy, structure relaxation