Aging Behavior of Al-Mg-Ge Alloys with Different Mg2Ge Contents

Tomoatsu Murakami; Kenji Matsuda; Takeshi Nagai; Junya Nakamura; Tokimasa Kawabata; Susumu Ikeno

doi:10.4028/www.scientific.net/AMR.409.63

Paper Titles

Microstructure Evolution in an Al-Cu-Mg-Ag Alloy during ECAP at 300°C
p.41

Analysis on Behavior of Hydrogen in Ion-Plated Pure Aluminum
p.47

The Ca-Rich Corner of the Al-Ca-Zn System
p.51

Rheo-Extrusion of Hypereutectic Al-14.8Si-4.5Cu-1.1Mg Alloy
p.57

Aging Behavior of Al-Mg-Ge Alloys with Different Mg₂Ge Contents
p.63

The Crystal Structure of the β’-Phase Including Ag in Al-Mg-Si-Ag Alloy
p.67

Investigation of the Substructure Evolution within Grains of Different Orientations during Recrystallization in a Commercial Al Alloy
p.71

Microstructural Control of a Zn-Al Eutectoid Alloy by Hot-Rolling
p.77

TEM Observation of Cu and Ag Addition Al-Mg-Si Alloys
p.81

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 409Aging Behavior of Al-Mg-Ge Alloys with Different...

Aging Behavior of Al-Mg-Ge Alloys with Different Mg₂Ge Contents

Abstract:

It is known that Al-Mg-Ge alloy shows the similar precipitation sequence to Al-Mg-Si alloy, and its equilibrium phase is β-Mg₂Ge according to its phase diagram. In this study, the precipitation sequence of Al-Mg-Ge alloys containing different contents of Mg₂Ge has been investigated by hardness test, TEM and HRTEM observation to understand the effect of Mg₂Ge contents on age-hardening behavior of the alloys. The hardness of as-quenched and peak-aged samples have been improved by increasing Mg₂Ge contents. The precipitates in the peak-aged samples have been classified into some metastable phases, such as the β’-phase and parallelogram-type precipitate by HRTEM observation. The relative frequency of these precipitates in the is has been changed with Mg₂Ge contents.