The weak-beam technique applied to superlattice dislocations in an iron—aluminium alloy

作者: I. L. F. Ray , R. C. Crawford , D. J. H. Cockayne

DOI: 10.1080/14786437008238488

关键词: Materials scienceDissociation (chemistry)Boundary energyElectron microscopeCondensed matter physicsAluminium alloySuperlattice

摘要: Abstract The ‘weak-beam’ technique of Cockayne, Ray and Whelan (1969) for resolving very closely spaced dislocations in the electron microscope has been applied to dissociation BZ-type superlattice highly ordered Fe-35 at. % Al. By plotting separation partials as a function orientation value 105±15 erg om−2 obtained antiphase boundary energy.

参考文章(6)
M. J. Marcinkowski, N. Brown, Direct Observation of Antiphase Boundaries in the Fe3Al Superlattice Journal of Applied Physics. ,vol. 33, pp. 537- 552 ,(1962) , 10.1063/1.1702463
AK Head, The computer generation of electron microscope pictures of dislocations Australian Journal of Physics. ,vol. 20, pp. 557- 566 ,(1967) , 10.1071/PH670557
A. K. Head, Unstable Dislocations in Anisotropic Crystals physica status solidi (b). ,vol. 19, pp. 185- 192 ,(1967) , 10.1002/PSSB.19670190121
A. N. Stroh, Dislocations and Cracks in Anisotropic Elasticity Philosophical Magazine. ,vol. 3, pp. 625- 646 ,(1958) , 10.1080/14786435808565804
H.J. Leamy, E.D. Gibson, F.X. Kayser, The elastic stiffness coefficients of iron-aluminum alloys—I experimental results and thermodynamic analysis Acta Metallurgica. ,vol. 15, pp. 1827- 1838 ,(1967) , 10.1016/0001-6160(67)90047-8
D. J. H. Cockayne, I. L. F. Ray, M. J. Whelan, Investigations of dislocation strain fields using weak beams Philosophical Magazine. ,vol. 20, pp. 1265- 1270 ,(1969) , 10.1080/14786436908228210