TY - JOUR N2 - The objective of this study was to investigate the dependence of the room temperature tensile properties on the volume fraction of discontinuous precipitates (DPs) in a cast AZ91 magnesium alloy. In order to obtain various volume fractions of DPs, the solution-treated alloy was aged at 428 K for up to 48 h. The volume fraction of DPs increased from 0% to 72% with an increase in the aging time up to 24 h; for aging times longer than 24 h, discontinuous precipitation was substantially inhibited owing to the occurrence of significant continuous precipitation within the α-(Mg) grains. YS and UTS of the alloy increased with the volume fraction of DPs, whereas the elongation showed a reverse trend. A relatively rapid change in the tensile properties with increasing volume fraction of DPs up to ~40% was noted, which would be due to the reduction of the effective α grain size in response to the formation of DPs along the grain boundaries. L1 - http://www.czasopisma.pan.pl/Content/113039/PDF/AMM-2019-3-58-Jun.pdf L2 - http://www.czasopisma.pan.pl/Content/113039 PY - 2019 IS - No 3 EP - 1186 DO - 10.24425/amm.2019.129511 KW - discontinuous precipitates KW - microstructure KW - AZ91 alloy KW - aging KW - Tensile properties A1 - Jun, Joong-Hwan PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 64 DA - 2019.09.03 T1 - Dependence of Room Temperature Tensile Properties on Volume Fraction of Discontinuous Precipitates in Cast AZ91 Magnesium Alloy SP - 1183 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/113039 T2 - Archives of Metallurgy and Materials ER -