The gamma/b criterion and twin-dislocation interactions in face-centered cubic crystals.

• Autorzy: Szczerba M.S.
• Konferencja: XVth Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies AMT'98, 17-21 May 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

A close relation between the gamma/b stress and two types of twin-dislocation interaction in face centered cubic crystals was found. The interaction between a growing twin and a substructure of perfect dislocations leads to the load drop (LD) twinning, which is to occur, if the gamma/b stress is satisfied on the habit plane only. The interaction between a growing twin and a substructure dominated by imperfect dislocations leads to the no load drop (NLD) twinning, but now, the gamma/b stress must be satisfied on the habit plane and on any other, non-habit, close packed plane of crystal lattice. It is also suggested, that a mechanism of the incorporation of imperfect dislocation into a growing twin basis on an imperfect-perfect dislocation conversion.

Słowa kluczowe

EN

crystal; face-centered cubic lattice; stresses; twinning; twin; dislocation

PL

kryształ; sieć regularna płasko-centryczna; naprężenia; tworzenie układów bliźniaczych; kryształ bliźniaczy; dyslokacja

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 415--422
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Szczerba M.S.

• Department of Structure and Mechanics of Solids University of Mining and Metallurgy, Cracow, Poland

• University of Mining and Metallurgy, Department of Structure and Mechanics of Solids, Kraków

Bibliografia

• [1] J.W. Christian, The Theory of Transformations in Metals and Alloys, Oxford, Pergamon Press. 1965, p.48
• [2] J.W. Christian, S. Mahajan, Progress in Materials Science, 39 (1995) 1
• [3] Z.S. Basinski, M.S. Szczerba, M. Niewczas, J.D. Embury, S.J. Basinski, La Revue Métallurgie-CIT/Science et Génie des Matériaux, 94 (1997) 1037
• [4] A.H. Cottrell, B.A. Bilby, Philosophical Magazine 42 (1951) 573
• [5] M.S. Szczerba, Materials Science & Engineering A 234-236 (1997) 1057
• [6] D.K. Bowen, J.W. Christian, Philosophical Magazine, 10 (1965) 369
• [7] J.P. Hirth, J. Lothe, Theory of Dislocations, New York, John Wiley, 1982, p.811
• [8] Z.S. Basinski, M.S. Szczerba, J.D. Embury, Philosophical Magazine 76 (1997) 743
• [9] M. Szczerba, A. Korbel, Czechoslovak Journal of Physics B 39 (1989) 145