The precipitation sequence in Al-Mg-Si alloys

被引：1149

作者：

Edwards, GA

Stiller, K

Dunlop, GL ^{[1
]}

Couper, MJ

机构：

[1] Univ Queensland, CRC Alloy & Solidificat Technol, Dept Min Minerals & Mat Engn, Brisbane, Qld 4072, Australia

[2] Chalmers Univ Technol, S-41296 Gothenburg, Sweden

[3] Comalco Res Ctr, Thomastown, Vic 3074, Australia

来源：

ACTA MATERIALIA | 1998年 / 46卷 / 11期

关键词：

D O I：

10.1016/S1359-6454(98)00059-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fine-scale precipitation that occurs during age hardening of Al alloy 6061 has been studied using differential scanning calorimetry (DSC), atom probe field ion microscopy (APFIM) and transmission electron microscopy (TEM). It was found that the precipitation sequence is: independent clusters of Mg and Si atoms --> co-dusters that contain Mg and Si atoms --> small precipitates of unknown structure --> beta " needle-shaped precipitates -->B' lath-shaped precipitates and beta' rod-shaped precipitates. A new structure is proposed for the beta " precipitate. It was found that the Mg:Si ratio in the intermediate precipitates and co-clusters was close to 1:1. (C) 1998 Acta Metallurgica Inc.

引用

页码：3893 / 3904

页数：12

共 48 条

[1] EFFECT OF REINFORCEMENTS ON THE AGING PROCESS OF AN AL-CU/SIO2AL2O3 METAL MATRIX COMPOSITE [J].

ABIS, S ;

DONZELLI, G .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1988, 7 (01) :51-52

[2] PERFORMANCE OF AN ENERGY COMPENSATOR WITH A LARGE ACCEPTANCE ANGLE [J].

ANDREN, HO .

JOURNAL DE PHYSIQUE, 1986, 47 (C-7) :483-488

[3] NATURAL AGING CHARACTERISTICS OF ALUMINUM-ALLOY 6061 REINFORCED WITH SIC WHISKERS AND PARTICLES [J].

BADINI, C ;

MARINO, F ;

TOMASI, A .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 136 :99-107

[4]

Barczy P., 1975, SCAND J METALL, V4, P284

[5]

Bechet D., 1994, P 4 INT C ALUMINUM A, P636

[6]

CHATTERJEE DK, 1973, J I MET, V101, P53

[7]

CORDIER H, 1965, Z METALLKD, V56, P669

[8] FORMATION OF A MODIFIED BETA'-PHASE IN ALUMINUM-ALLOY 6061 [J].

DUMOLT, SD ;

LAUGHLIN, DE ;

WILLIAMS, JC .

SCRIPTA METALLURGICA, 1984, 18 (12) :1347-1350

[9] A CALORIMETRIC STUDY OF PRECIPITATION IN COMMERCIAL ALUMINUM ALLOY-6061 [J].

DUTTA, I ;

ALLEN, SM .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1991, 10 (06) :323-326

[10] The composition of fine-scale precipitates in Al-Mg-Si alloys [J].

Edwards, GA ;

Stiller, K ;

Dunlop, GL ;

Couper, MJ .

ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3, 1996, 217 :713-718

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