The structure of shear bands in twinned fcc crystals and their influence on recrystallization nucleation

• Autorzy: Paul H. , Driver J.H.
• Języki publikacji: EN

Abstrakty

EN

The orientations of recrystallization nuclei and their adjacent as-deformed regions have been characterised in deformed single crystals of different metals (Ag, Cu, Cu-2%wt.Al and Cu-8%wtAl) in which twinning and/or shear banding occur. {112 }<111> oriented crystals of these metals have been compressed to different strains, then lightly annealed, and the crystallographic aspects of the recrystallization process along shear bands examined by local orientation measurement in TEM and SEM. The results clearly show the existence of a well-defined crystallographic relation between the local deformation substructure and the first recrystallized areas of uniform orientation. The first-formed nuclei always exhibit near 25--40° (<111>-<112>) type misorientations, in the direction of highest growth, with respect to one of the two main groups of the deformation texture components. The rotation axes can be correlated with the slip plane normal of highest activity. As recrystallization proceeds, recrystallization twinning develops strongly and facilitates rapid growth; the first and higher generations of twins then tend to obscure the initial primary crystallographic relation between the shear bands and recrystallization nuclei.

Słowa kluczowe

EN

nucleation of recrystallization; texture; electron diffraction; single cristals

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2006
• Tom: Vol. 54, nr 2
• Strony: 209--220
• Opis fizyczny: Bibliogr. 20 poz., 11 rys.

Twórcy

autor

Paul H.

autor

Driver J.H.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St, 30-059 Cracow, Poland,

Bibliografia

• [1] R.D. Doherty, D.A. Hughes, F.J. Humphreys, J.J. Jonas, D. Juul Jensen, M.E. Kassner, W.E. King, T.R. McNelly, H.J. Mc-Queen, and A.D. Rollet, “Current issues in recrystallization: a review”, Mat. Sci. Engn. A 238, 219–274 (1997).
• [2] W.G. Burgers and P.C. Louwerse, “Über den Zusammenhang zwischen Deformationsvorgang und Rekristallisationstextur bei Aluminium. (Rekristallisation von Aluminiumeinkristallen III)”, Z. Physik 67, 605–678 (1931).
• [3] B. Liebman, K. Lücke, and G. Masing, “Untersuchungen über die Orientierungsabhängigkeit der Wachstumgeschwin-Bull. Pol. Ac.: Tech. 54(2) 2006 219 H. Paul and J.H. Driver digkeit bei der primären Rekristallisation von Aluminium-Einkristallen”, Z. Metallk. 47, 57–63 (1956).
• [4] D.A. Molodov, U. Czubayko, G. Gottstein, and L.S. Shvindlerman, “Mobility of <111> tilt grain boundaries in the vicinity of the special misorientation Sigma 7 in bicrystals of pure aluminium”, Scripta Metall. Mater. 32, 529–534 (1995).
• [5] G. Ibe and K. Lücke, Recrystallization, Grain Growth and Textures, ed. by H. Margolin, Am. Soc. Metals, Metals Park, Ohio, 434 (1966).
• [6] C. Donadille, R. Valle, P. Dervin, and R. Penelle, “Development of texture and microstructure during cold-rolling and annealing of F.C.C. alloys: Example of an austenitic stainless steel”, Acta Metall. 37, 1547–1571 (1989).
• [7] H. Paul, J.H. Driver, and Z. Jasie´nski, “Shear banding and recrystallization nucleation in a Cu-2%Al alloy single crystal”, Acta Mater. 52, 815–830 (2002).
• [8] H. Paul, J.H. Driver, C. Maurice, and Z. Jasie´nski, “Crystallographic aspects of the early stages of recrystallisation in brasstype shear bands”, Acta Mater. 52, 4339–4355 (2002).
• [9] J. Hjelen, R. Orsund, and E. Nes, “On the origin of recrystallization textures in aluminium”, Acta Metall. Mater. 39, 1377–1404 (1991).
• [10] A. Berger, P.J. Wilbrandt, F. Ernst, U. Klement, and P. Haasen, “On the generation of new orientations during recrystallization: recent results on the recrystallization of tensile-deformed fcc single crystals”, Progress in Mater. Sci. 32, 1–95 (1988).
• [11] A.A. Ridha and W.B. Hutchinson, “Recrystallization mechanisms and the origin of cube texture in copper”, Acta Metall. 30,1929–1939 (1982).
• [12] B.J. Duggan, M. Sindel, G.D. Köhlhoff, and K. Lücke, “Oriented nucleation, oriented growth and twinning in cube texture formation”, Acta Metall. Mater. 38, 103–111 (1990).
• [13] D. Juul Jensen, “Effects of orientation on growth during recrystallization”, in: Microstructural and Crystallographic Aspects of Recrystallization, ed. N. Hansen et al., Roskilde, Proceedings of 16th RISØInt. Sym. on Mat. Sci., Denmark, 119–137 (1995).
• [14] O. Engler, “Recrystallisation textures in copper-manganese alloys”, Acta Metall. Mater. 49, 1237–1247 (2001).
• [15] S. Zaefferer, T. Baudin, and R. Penelle, “A study on the formation mechanisms of the cube recrystallization texture in cold rolled Fe-36%Ni alloys”, Acta Mater. 49, 1105–1122 (2001).
• [16] J.H. Driver, M.C. Theyssier, and C. Maurice, “Electron backscattered diffraction microtexture studies on hot deformed aluminum crystals”, Mat. Sci. Techn. 12, 851–858 (1996).
• [17] H. Paul, J. H. Driver, C. Maurice, and Z. Jasienski, “Shear band microtexture formation in twinned face centred cubic single crystals”, Mat. Sci. Engn. A359, 178–191 (2003).
• [18] H. Paul, A. Morawiec, E. Bouzy, J.J. Fundenberger, and A. Piątkowski, “Brass type shear bands and their influence on texture formation”, Metall. Mater. Trans. 35A, 3775–3786 (2004).
• [19] H. Paul, J.H. Driver, C. Maurice, and A. Pia˛tkowski, “The formation of new orientations during recrystallization of silver single crystals with {112}<111> initial orientation”, Mat. Sci. Forum 467–470, 177–182 (2004).
• [20] F. J. Humphreys and M. Hatherly, Recrystallization and Related Annealing Phenomena, Pergamon Press, Oxford, 1995.