caa a22 4500 46322793X CHVBK 20180405153233.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-2003-1 doi (NATIONALLICENCE)springer-10.1007/s10853-007-2003-1 Lee Choong Technical Development Division, GM Daewoo Auto & Technology (GMDAT), 199-1 Cheongcheon-Dong, Bupyung-Gu, 403-714, Incheon, Korea aut Tensile properties of high-pressure die-cast AM60 and AZ91 magnesium alloys on microporosity variation [Elektronische Daten] [Choong Lee] The effect of microporosity on the variability in the tensile properties of high-pressure die-cast AM60 and AZ91 alloys was investigated, together with a theoretical prediction based on a constitutive model. The strain rate sensitivity of both alloys was measured through an incremental strain rate change test at room temperature, and the microporosity was measured through quantitative fractography analyses on the fractured surface. The variability in the tensile strength and elongation of both alloys can be empirically described as a power law relationship in terms of the microporosity variation. The defect susceptibility of the UTS and elongation to the microporosity variation in the AZ91 alloy is slightly higher than that in the AM60 alloy. The constitutive prediction on the tensile properties of the AM60 and AZ91 alloys is in good agreement with the experimental results, and it suggests that the defect susceptibility of the tensile properties to the microporosity variation is significantly decreased with the increase of strain hardening exponent. Springer Science+Business Media, LLC, 2007 Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10032-10039 0022-2461 42:24<10032 2007 42 10853 https://doi.org/10.1007/s10853-007-2003-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-2003-1 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Lee Choong Technical Development Division, GM Daewoo Auto & Technology (GMDAT), 199-1 Cheongcheon-Dong, Bupyung-Gu, 403-714, Incheon, Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10032-10039 0022-2461 42:24<10032 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer