TY - JOUR
T1 - Morphology evolution of β-phase in Al-Mg-Si alloys during aging treatment
AU - Ahmed, Abrar
AU - Uttarasak, Kanokwan
AU - Tsuchiya, Taiki
AU - Lee, Seungwon
AU - Nishimura, Katsuhiko
AU - Nunomura, Norio
AU - Shimizu, Kazuyuki
AU - Hirayama, Kyosuke
AU - Toda, Hiroyuki
AU - Yamaguchi, Masatake
AU - Tsuru, Tomohito
AU - Ikeno, Susumu
AU - Matsuda, Kenji
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/6/15
Y1 - 2024/6/15
N2 - This study aims to clarify the growth process of the β-phase in Al-Mg-Si alloys from the point of view of morphological evolution. The orientation relationship, shape, growth process, misfit value, and interfacial condition between the β-phase and Al matrix were investigated using high-resolution transmission electron microscopy (HR-TEM), focused ion beam (FIB), and optical microscope (OM). In a previous study, the growth process and shape of the β-phase were determined using scanning electron microscopy (SEM). It was proposed that the truncated octahedron (8{111}, 6{100} facets) transforms into a hexahedron (6{100} facets). This study proposes that two new three-dimensional shapes of the β-phase exist between the truncated octahedron and hexahedron, and we identified the {111}β facets at the edges of the β-phase. We proposed the morphology evolution during the growth process of Mg2Si crystals and calculated the misfit to understand that the unstable {111}β facet has a higher misfit value compared to the {001}β and {011}β facets. Our observations provide insight into how they influence the behavior of Mg2Si crystals, which is crucial for predicting the microstructural evolution of Al-Mg-Si alloys and for designing materials with desired properties.
AB - This study aims to clarify the growth process of the β-phase in Al-Mg-Si alloys from the point of view of morphological evolution. The orientation relationship, shape, growth process, misfit value, and interfacial condition between the β-phase and Al matrix were investigated using high-resolution transmission electron microscopy (HR-TEM), focused ion beam (FIB), and optical microscope (OM). In a previous study, the growth process and shape of the β-phase were determined using scanning electron microscopy (SEM). It was proposed that the truncated octahedron (8{111}, 6{100} facets) transforms into a hexahedron (6{100} facets). This study proposes that two new three-dimensional shapes of the β-phase exist between the truncated octahedron and hexahedron, and we identified the {111}β facets at the edges of the β-phase. We proposed the morphology evolution during the growth process of Mg2Si crystals and calculated the misfit to understand that the unstable {111}β facet has a higher misfit value compared to the {001}β and {011}β facets. Our observations provide insight into how they influence the behavior of Mg2Si crystals, which is crucial for predicting the microstructural evolution of Al-Mg-Si alloys and for designing materials with desired properties.
KW - Beta phase
KW - Focus ion beam (FIB)
KW - High resolution transmission electron microscopy (HR-TEM)
KW - MgSi
KW - Optical microscope (OM)
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=85189105028&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2024.174234
DO - 10.1016/j.jallcom.2024.174234
M3 - 学術論文
AN - SCOPUS:85189105028
SN - 0925-8388
VL - 988
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 174234
ER -