caa a22 4500 388018399 CHVBK 20180307124917.0 cr unu---uuuuu 161130e199811 xx s 000 0 eng 10.1557/JMR.1998.0422 doi S0884291400046562 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0422 Effect of volume fraction of dispersed SiO2 particles on intermediate-temperature embrittlement in Cu-SiO2 polycrystals [Elektronische Daten] Several kinds of Cu polycrystals with dispersed SiO2 particles of different volume fractions were tensile tested at high temperatures from 473 K to 1023 K. All of the alloys showed clear intermediate-temperature embrittlement (ITE). Although the temperature of minimum elongation was almost the same in all the alloys, temperature dependence of fracture strain depended strongly on the SiO2 volume fraction: (1) At a fixed temperature, the fracture strain tended to first decrease with increase in SiO2 volume fraction, showed minimum in an alloy with certain volume fraction, and increased again with increase in volume fraction. (2) With increase in SiO2 volume fraction, the temperature range of ITE became narrower and sharper. These results were reasonably understood by considering the occurrence of stress concentration at grain-boundary particles induced by grain-boundary sliding (GBS) and occurrence of dynamic recrystallization and stress relaxation by Cu/SiO2 interfacial diffusion. Copyright © Materials Research Society 1998 Miura Hiromi Department of Mechanical and Control Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan Sakai Taku Department of Mechanical and Control Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan Gottstein Günter Institut für Metallkunde und Metallphysik, RWTH Aachen, D-52056, Germany Journal of Materials Research Cambridge University Press 13/11(1998-11), 3100-3105 0884-2914 13:11<3100 1998 13 JMR https://doi.org/10.1557/JMR.1998.0422 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0422 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miura Hiromi Department of Mechanical and Control Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan NATIONALLICENCE 700 1- Sakai Taku Department of Mechanical and Control Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan NATIONALLICENCE 700 1- Gottstein Günter Institut für Metallkunde und Metallphysik, RWTH Aachen, D-52056, Germany NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/11(1998-11), 3100-3105 0884-2914 13:11<3100 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge