Natural Aging in Al-Mg-Si Alloys - A Process of Unexpected Complexity

被引：184

作者：

Banhart, John ^{[1
,2
]}

Chang, Cynthia Sin Ting ^{[1
]}

Liang, Zeqin ^{[1
]}

Wanderka, Nelia ^{[1
]}

Lay, Matthew D. H. ^{[3
]}

Hill, Anita J. ^{[3
]}

机构：

[1] Helmholtz Ctr Berlin Mat & Energy, D-14709 Berlin, Germany

[2] Tech Univ Berlin, D-10623 Berlin, Germany

[3] CSIRO Mat Sci & Engn, Clayton, Vic, Australia

来源：

ADVANCED ENGINEERING MATERIALS | 2010年 / 12卷 / 07期

关键词：

PRECIPITATION KINETICS; POSITRON-ANNIHILATION; ELECTRON-MICROSCOPY; METASTABLE PHASES; ALUMINUM; TEMPERATURE; BEHAVIOR; STABILITY; CLUSTERS; DECOMPOSITION;

D O I：

10.1002/adem.201000041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The natural aging behavior of pure ternary Al-Mg-Si alloys is investigated by measuring hardness, electrical resistivity and positron lifetime, as well as carrying out thermal analysis and atom probe microscopy. It is found that several distinct temporal stages of natural aging can be distinguished in which one of these quantities shows a characteristic behavior and that these times coincide for many of these measurements. The rate of change in the measured data is correlated with proposed solute dynamics during natural aging for both aging that takes place prior to artificial aging (natural pre-aging) and after artificial underaging (natural secondary aging) heat treatments. Controlling factors for solute dynamics are discussed.

引用

页码：559 / 571

页数：13

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