TY - JOUR
T1 - Effects of scandium and zirconium addition on recrystallization behavior of AlMgSi alloy
AU - Ikeda, Ken Ichi
AU - Takashita, Takuya
AU - Akiyoshi, Ryutaro
AU - Hata, Satoshi
AU - Nakashima, Hideharu
AU - Yamada, Kazuhiro
AU - Kaneko, Kenji
N1 - Funding Information:
We would like to express their hearty thanks to Mr. Y. Nishihata and T. Yokote for their help in the experimental work. We are also thankful to Kobe Steel, Ltd., for making AlMgSiScZr alloys used in this study. The present study was financially supported by The Japan Aluminium Association, The Light Metal Educational Foundation, Inc. and JSPS KAKENHI Grant Number 16H04502.
Publisher Copyright:
©2018 The Japan Institute of Light Metals
PY - 2018
Y1 - 2018
N2 - The effects of thermally stabilized particles on the recrystallization behavior of an AlMgSi alloy were investigated to obtain the fundamental knowledge for controlling the microstructure, texture, and mechanical properties of this alloy. In this study, the AlMgSiScZr alloy was cast, homogenized, and hot-rolled. Three types of spherical Al3(Sc, Zr) particles with L12 structure, rod-like incoherent, spherical semi-coherent, and spherical incoherent particles, were observed in a hot-rolled sample of the AlMgSiScZr alloy using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDS). In addition, three-dimensional electron tomography (3D-ET) and STEM-EDS revealed that all particles have a core-shell structure with a Sc-enriched core and a Zr-enriched shell. It is considered that these particles are formed during casting, homogenized treatment, and hot rolling. The crystal orientation distribution of the sample after cold rolling indicated that the presence of Al3(Sc, Zr) particles may interfere with the recrystallization (grain growth) until 600°C. Comparison with the driving force of primary recrystallization and grain growth, and the pinning force of Al3(Sc, Zr) particles, showed that these particles mainly contribute to the suppression of grain growth. The results of an in-situ heating SEM/EBSD analysis of the cold-rolled AlMgSiScZr alloy supported this suggestion.
AB - The effects of thermally stabilized particles on the recrystallization behavior of an AlMgSi alloy were investigated to obtain the fundamental knowledge for controlling the microstructure, texture, and mechanical properties of this alloy. In this study, the AlMgSiScZr alloy was cast, homogenized, and hot-rolled. Three types of spherical Al3(Sc, Zr) particles with L12 structure, rod-like incoherent, spherical semi-coherent, and spherical incoherent particles, were observed in a hot-rolled sample of the AlMgSiScZr alloy using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDS). In addition, three-dimensional electron tomography (3D-ET) and STEM-EDS revealed that all particles have a core-shell structure with a Sc-enriched core and a Zr-enriched shell. It is considered that these particles are formed during casting, homogenized treatment, and hot rolling. The crystal orientation distribution of the sample after cold rolling indicated that the presence of Al3(Sc, Zr) particles may interfere with the recrystallization (grain growth) until 600°C. Comparison with the driving force of primary recrystallization and grain growth, and the pinning force of Al3(Sc, Zr) particles, showed that these particles mainly contribute to the suppression of grain growth. The results of an in-situ heating SEM/EBSD analysis of the cold-rolled AlMgSiScZr alloy supported this suggestion.
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U2 - 10.2320/matertrans.L-M2018802
DO - 10.2320/matertrans.L-M2018802
M3 - Article
AN - SCOPUS:85045122096
VL - 59
SP - 590
EP - 597
JO - Materials Transactions
JF - Materials Transactions
SN - 0916-1821
IS - 4
ER -