caa a22 4500 463227239 CHVBK 20180405153230.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-1352-5 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1352-5 Boehlert C. Chemical Engineering and Materials Science, Michigan State University, 2527 Engineering Buidling, 48824, East Lansing, MI, USA aut The tensile and creep behavior of Mg-Zn Alloys with and without Y and Zr as ternary elements [Elektronische Daten] [C. Boehlert] Tensile-creep experiments were conducted in the temperature range 100-200°C and stress range 20-83MPa for a series of magnesium-zinc-yttrium (Mg-Zn-Y) and mangnesium-zinc-zirconium (Mg-Zn-Zr) alloys ranging from 0 to 5.4wt%Zn, 0 to 3wt%Y, and 0 to 0.6wt.%Zr. The greatest tensile-creep resistance was exhibited by an Mg-4.1Zn-0.2Y alloy. The room-temperature yield strength increased with increasing Y content for Mg-1.6-2.0Zn alloys. The greatest tensile strength and elongation was exhibited by Mg-5.4Zn-0.6Zr. This alloy also exhibited the finest grain size and the poorest creep resistance. The measured creep exponents and activation energies suggested that the creep mechanisms were dependent on stress. For applied stresses greater than 40MPa, the creep exponents were between 4 and 8. For applied stresses less than 40MPa, the creep exponent was 2.2. The calculated activation energies (Qapp) were dependent on temperature where the Q app values between 100 and 150°C (65kJ/mol) were half those between 150 and 200°C for the same applied stress value (30MPa). Deformation observations indicated that the grain boundaries were susceptible to cracking in both tension and tension-creep, where at low applied stresses grain boundary sliding was suggested where strain accommodation occurred through grain boundary cracking. Thus grain size and grain boundaries appeared to be important microstructural parameters affecting the mechanical behavior. Microstructural effects on the tensile properties and creep behavior are discussed in comparison to other Mg-based alloy systems. Springer Science+Business Media, LLC, 2007 Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3675-3684 0022-2461 42:10<3675 2007 42 10853 https://doi.org/10.1007/s10853-006-1352-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1352-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Boehlert C. Chemical Engineering and Materials Science, Michigan State University, 2527 Engineering Buidling, 48824, East Lansing, MI, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3675-3684 0022-2461 42:10<3675 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer