Micromechanics of plasticity of Mg composites.

• Autorzy: Lukac P. , Trojanova Z. , Chmelik F. , Kiehn J.
• Konferencja: XV Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies, AMT'98, Kraków-Krynica 17-21May 1998, Poland
• Języki publikacji: EN

Abstrakty

EN

This paper describes changes in the microstructure of Mg composites determined by non-destructive methods: dilatometry and acoustic emission during thermal cycling and damping after thermal cycling. Thermal cycles between room and an upper temperature were performed. The dimensional changes and the acoustic emission activity during thermal cycling indicate the creation and motion of dislocations. The strain dependence of the logarithmic decrement measured after thermal cycling can be divided in two regions. A region of strain independent damping is followed by a region with a strong strain dependent damping. The values of the logarithmic decrement in the strain dependent region depend strongly on the upper temperature of thermal cycle. The observed experimental data can be explained assuming that new dislocations created during thermal cycling change the microstructure of composites.

Słowa kluczowe

EN

microstructure; plasticity; magnesium; composites; non-destructive methods; dilatometry; acoustic emission

PL

mikrostruktura; plastyczność; magnez; kompozyt; metody nieniszczące; badanie dylatometryczne; emisja akustyczna

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 130--137
• Opis fizyczny: Bibliogr. 18 poz., tab., rys.

Twórcy

autor

Lukac P.

• Departament of Metal Physics, Charles University, Praha, Czech Republic

autor

Trojanova Z.

• Departament of Metal Physics, Charles University, Praha, Czech Republic

autor

Chmelik F.

• Departament of Metal Physics, Charles University, Praha, Czech Republic

autor

Kiehn J.

• Department of Materials Engineering and Technology, University of Clausthal, Clausthal-Zellerfeld, Germany

• Charles University, Departament of Metal Physics, Praha, Czech Republic

Bibliografia

• [1] M. Vogelsang, R.J. Arsenault and R.M. Fisher, Metall. Trans., 17A (1986) 379.
• [2] R.J. Arsenault and N. Shi, Mater. Sci. Eng., A81 (1986) 175.
• [3] M. Taya and T. Mori, Acta metall., 35 (1987)155.
• [4] W. Funk and E. Blank, Metall. Trans., 19A (1988) 987.
• [5] P. Lukáč, F. Chmelík, U. Roos, K. U. Kainer and B. L. Mordike, in Proceedings of 2nd International Symposium on Advanced Materials and Technologies, Innovation 95, Ostrava, p.280 (1995).
• [6] Z.. Trojanová, P. Lukáč, W. Riehemann and B. L. Mordike, Mater. Sci. Forum, 210-213 1996) 519.
• [7] K.U. Kainer, in Magnesium Alloys and Their Applications. B. L. Mordike and F. Hehmann (eds.), DGM Informationsgesellschaft, Oberursel, p.415 (1992).
• [8] Z. Trojanová, M. Pahutová, J. Kiehn, P. Lukáč and K. U. Kainer, Key Eng. Mater., 127-131 (1997) 1001
• [9] P. Buchhagen, W. Riehemann and B. L. Mordike, in Magnesium Alloys and Their Applications. Eds. B. L. Mordike and F. Hehmann, DGM Informationsgesellschaft Oberursel. (1992).
• [10] J. Kiehn, C. Köhler and K. U. Kainer, Key Eng. Mater., 97-98 (1994) 37.
• [11] C. Köhler and K. U. Kainer, in Proceedings of International Conference on Advanced omposites., Eds. T. Chandra and A. K. Dhingra, The Minerals, Metals and Materials Society, Warandele, p. 1243 (1993).
• [12] Z. Trojanová, P. Lukáč, W. Riehemann and B. L. Mordike, Proceedings of 3rd International Magnesium Conference., Ed., G. W. Lorimer, The Institute of Materials, Manchester, p.359 (1997).
• [13] J. Kiehn, Z. Trojanová, P. Lukáč and K. U. Kainer, Key Eng. Mater., 127-131 (1997) 993
• [14] A.Granato and K. Lücke, J. Appl. Phys. 27 (1956) 593 and 789.
• [15] R. De Batist, in Materials Science and Technology., Eds. R. W. Cahn et al., Vol. 2B, VCH Veinheim, P.159 (1994).
• [16] J. Kiehn, K.U. Kainer, Z. Trojanová, F. Chmelík, P. Lukáč: in Proc. 11th International International Conference on Composite Materials, Vol. III., Gold Coast, Australia (1997), 585.
• [17] F. Chmelík, Z. Trojanová, J. Kiehn, P. Lukáč, K.U. Kainer: Mater. Sci. Eng. 234-236 (1997), 774.
• [18] D.C. Dunand and A. Mortensen, Acta metall. mater., 39 (1991) 127.