TY - GEN
T1 - TEM observation of metastable phases in aged Al-Mg-Ge alloys
AU - Matsuda, Kenji
AU - Nakamura, Junya
AU - Yamamoto, Keisuke
AU - Kawabata, Tokimasa
AU - Uetani, Yasuhiro
AU - Ikeno, Susumu
PY - 2010/1/1
Y1 - 2010/1/1
N2 - The purpose of study is to investigate aging behavior, crystal structures of metastable phase and relative frequency of metastable phases in aged Al-Mg-Ge and Al-Mg-Ge-Si alloys using high resolution transmission electron microscope (HRTEM), energy dispersive X-ray spectroscopy (EDS) and electron energy-loss spectroscopy (EELS). Every alloy included rod-shaped precipitate which is the same as the typical metastable phase, β', in Al-Mg-Si alloy. Except to Mg-rich alloys, the Type-A precipitate, which is a typical metastable phase in the excess Si type Al-Mg-Si alloys and popular at over aged condition, was confirmed as a large rod-shaped precipitates in those alloys. This behavior is probably depends on the ratio of Mg/Ge. Also, Mg, Si and Ge were detected from the β'-phase in Al-Mg-Ge-Si alloy by EELS. This means that the β'-phase in Al-Mg-Ge-Si alloy consists of these 3 elements including Si, not just Ge to form metastable Mg2Ge.
AB - The purpose of study is to investigate aging behavior, crystal structures of metastable phase and relative frequency of metastable phases in aged Al-Mg-Ge and Al-Mg-Ge-Si alloys using high resolution transmission electron microscope (HRTEM), energy dispersive X-ray spectroscopy (EDS) and electron energy-loss spectroscopy (EELS). Every alloy included rod-shaped precipitate which is the same as the typical metastable phase, β', in Al-Mg-Si alloy. Except to Mg-rich alloys, the Type-A precipitate, which is a typical metastable phase in the excess Si type Al-Mg-Si alloys and popular at over aged condition, was confirmed as a large rod-shaped precipitates in those alloys. This behavior is probably depends on the ratio of Mg/Ge. Also, Mg, Si and Ge were detected from the β'-phase in Al-Mg-Ge-Si alloy by EELS. This means that the β'-phase in Al-Mg-Ge-Si alloy consists of these 3 elements including Si, not just Ge to form metastable Mg2Ge.
KW - Al-Mg-Ge alloy
KW - EDS
KW - Elemental map
KW - HRTEM
KW - Metastable phase
KW - Precipitation
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U2 - 10.4028/www.scientific.net/MSF.654-656.930
DO - 10.4028/www.scientific.net/MSF.654-656.930
M3 - Conference contribution
AN - SCOPUS:77955497853
SN - 0878492550
SN - 9780878492558
T3 - Materials Science Forum
SP - 930
EP - 933
BT - PRICM7
PB - Trans Tech Publications Ltd
T2 - 7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Y2 - 2 August 2010 through 6 August 2010
ER -