Conclusions
Experimental data have been obtained for the Ag-MgO system demonstrating the existence of a mean critical width L of the necks between adjacent particles. It is noted that this magnitude is related to the critical degree of deformation at fracture, ɛlfr, and to the transverse contraction of alloys with secondary particles, ψ. The screening influence exerted by large-sized particles on the void coalescence process is described. For the alloys investigated, the critical MgO particle size, capable of inducing void nucleation, has been found to lie in the range 30–50 nm.
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Literature cited
J. Gurland and J. Plateau, Trans. Am. Soc. Metals,56, 442 (1963).
L. Roesch, G. Henry, M. Eudier, and J. Plateau, Mem. Sci. Rev. Met.,63, No. 11, 927 (1966).
M. Miškovičová, “Dispersion hardening of silver by MgO particles,” Candidate's Dissertation, VUZ, Kosice (1970).
M. Miškovičová and E. Dudrová, Poroky Práškové Met.,4, 3 (1971).
M. Šlesár, M. Miškovičová, B. Stefan, and M. Besterci, Second International Symposium on Composite Metallic Materials, Bratislava, Czechoslovakia (1975).
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Translated from Poroshkovaya Metallurgiya, No. 10(178), pp. 99–103, October, 1977.
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Šlesár, M., Besterci, M., Štefan, B. et al. Ductile fracture of dispersion-hardened alloys. Powder Metall Met Ceram 16, 820–824 (1977). https://doi.org/10.1007/BF00793597
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DOI: https://doi.org/10.1007/BF00793597