Kim, SI Ko, BC Lee, HI Yoo, YC 2024-01-21T08:07:04Z 2024-01-21T08:07:04Z 2022-01-25 2003-10 1598-9623 https://pubs.kist.re.kr/handle/201004/138156 The high-temperature deformation behavior and dynamic softening transition from dynamic recrystallization (DRX) to dynamic recovery (DRV) of Al-18 wt.%Si alloy was studied by torsion tests in a temperature range of 573similar to773 K and a strain rate range of 0.001similar to1/sec. The alloy was produced by spray-forming followed by hot extrusion. The dependence of flow stress (sigma) on strain rate (epsilon) and temperature (T) could be described by the power Arrhenius relationship, epsilon = A sigma(p)(n) exp(-Q/RT). The activation energy and stress exponent values were higher at the low temperature region than those at the high temperature region. The alloy showed a flow curve of DRX in the temperature range of 573similar to673 K, while at 673similar to773 K, the alloy exhibited a flow curve of DRV. These results were analyzed by observing the shapes of the flow curves throughout the deformation condition. Also, the transition behavior from DRX to DRV has been investigated through observation of deformed microstructure and flow curves during hot deformation. English KOREAN INST METALS MATERIALS Dynamic softening behavior of Al-18Si alloy produced by spray forming Article 10.1007/BF03027149 1 METALS AND MATERIALS INTERNATIONAL, v.9, no.5, pp.447 - 451 METALS AND MATERIALS INTERNATIONAL 9 5 447 451 N scie scopus kci other 000186007400003 2-s2.0-1842472320 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article STAINLESS-STEEL SIC PARTICLE HOT-WORKING RECRYSTALLIZATION COMPOSITES dynamic recrystallization dynamic recovery constitutive equations dynamic softening transition