TEM Observation of Metastable Phases in Aged Al-Mg-Ge Alloys

被引：2

作者：

Matsuda, Kenji ^{[1
]}

Nakamura, Junya ^{[1
]}

Yamamoto, Keisuke ^{[1
]}

Kawabata, Tokimasa ^{[1
]}

Uetani, Yasuhiro ^{[2
]}

Ikeno, Susumu ^{[1
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Engn Res, 3190 Gofuku, Toyama 9308555, Japan

[2] Toyama Prefect Univ, Toyama 9390938, Japan

来源：

PRICM 7, PTS 1-3 | 2010年 / 654-656卷

关键词：

Al-Mg-Ge alloy; precipitation; metastable phase; HRTEM; EDS; elemental map; SI;

D O I：

10.4028/www.scientific.net/MSF.654-656.930

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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, beta', 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 beta'-phase in Al-Mg-Ge-Si alloy by EELS. This means that the beta'-phase in Al-Mg-Ge-Si alloy consists of these 3 elements including Si, not just Ge to form metastable Mg2Ge.

引用

页码：930 / +

页数：2

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