TY - GEN
T1 - Effects of the Extrusion Temperature on Microstructure, Texture Evolution and Mechanical Properties of Extruded Mg–2.49Nd–1.82Gd–0.19Zn–0.4Zr Alloy
AU - Xiao, Lei
AU - Yang, Guangyu
AU - Luo, Shifeng
AU - Jie, Wanqi
N1 - Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society.
PY - 2019
Y1 - 2019
N2 - Microstructure, texture evolution and mechanical properties of extruded Mg–2.49Nd–1.82Gd –0.19Zn–0.4Zr alloy were investigated at extrusion temperatures of 260 °C, 280 °C, 300 °C and 320 °C, with an extrusion ratio of 15 and RAM speed of 3 mm s−1, respectively. The results indicated that the coarse grains of homogenized billets were substantially refined after the extrusion process, which was caused by the refinement of dynamically recrystallization (DRX) and the pinning effect of precipitated Mg5Gd and Mg12(Nd, Gd) particles. The grain size decreased gradually when the extrusion temperature increased from 260 to 280 and 300°C, and then coarsened slightly once the extrusion temperature further increased to 320 °C. Moreover, the DRX process was promoted with the increasing extrusion temperature, and a completely DRX microstructure could be obtained when the extrusion temperature up to 300 °C. The room temperature tensile and compressive yield strength increased when the temperature increased from 260 to 300 °C and then decreased at 320 °C. All extruded alloys exhibited an extremely low tension–compression yield asymmetry, which was mainly attributed to the rare earth (RE) texture component as well as the fine microstructure developed during the extrusion process.
AB - Microstructure, texture evolution and mechanical properties of extruded Mg–2.49Nd–1.82Gd –0.19Zn–0.4Zr alloy were investigated at extrusion temperatures of 260 °C, 280 °C, 300 °C and 320 °C, with an extrusion ratio of 15 and RAM speed of 3 mm s−1, respectively. The results indicated that the coarse grains of homogenized billets were substantially refined after the extrusion process, which was caused by the refinement of dynamically recrystallization (DRX) and the pinning effect of precipitated Mg5Gd and Mg12(Nd, Gd) particles. The grain size decreased gradually when the extrusion temperature increased from 260 to 280 and 300°C, and then coarsened slightly once the extrusion temperature further increased to 320 °C. Moreover, the DRX process was promoted with the increasing extrusion temperature, and a completely DRX microstructure could be obtained when the extrusion temperature up to 300 °C. The room temperature tensile and compressive yield strength increased when the temperature increased from 260 to 300 °C and then decreased at 320 °C. All extruded alloys exhibited an extremely low tension–compression yield asymmetry, which was mainly attributed to the rare earth (RE) texture component as well as the fine microstructure developed during the extrusion process.
KW - Extrusion temperature
KW - Magnesium alloy
KW - Tension–compression yield asymmetry
KW - Texture analysis
UR - http://www.scopus.com/inward/record.url?scp=85064719887&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-05789-3_12
DO - 10.1007/978-3-030-05789-3_12
M3 - 会议稿件
AN - SCOPUS:85064719887
SN - 9783030057886
T3 - Minerals, Metals and Materials Series
SP - 69
EP - 75
BT - Magnesium Technology, 2019
A2 - Jordon, J. Brian
A2 - Orlov, Dmytro
A2 - Neelameggham, Neale R.
A2 - Joshi, Vineet V.
PB - Springer International Publishing
T2 - Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019
Y2 - 10 March 2019 through 14 March 2019
ER -