Early decomposition of supersaturated solid solutions of Al-Zn-Mg casting alloys

被引：20

作者：

Dellah, M. ^{[1
,2
]}

Bournane, M. ^{[2
]}

Ragab, Kh A. ^{[2
,3
]}

Sadaoui, Y. ^{[4
]}

Sirenko, A. F. ^{[5
]}

机构：

[1] Univ Tizi Ouzou, Dept Chim, Tizi Ouzou, Algeria

[2] Univ Quebec Chicoutimi, CURAL, Chicoutimi, PQ G7H 2B1, Canada

[3] Cairo Univ, Fac Engn, Dept Met, Cairo, Egypt

[4] Univ Tizi Ouzou, Dept Phys, Tizi Ouzou, Algeria

[5] Univ Kharkov, Fac Phys, Kharkov, Ukraine

来源：

MATERIALS & DESIGN | 2013年 / 50卷

关键词：

Aluminum alloys; Electrical resistance; Hardness; Phase transformation; Small angle X-ray scattering; Solid solution decomposition; 2-STEP AGING TREATMENT; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; HEAT-TREATMENTS; CU ALLOY; PRECIPITATION; ZONES;

D O I：

10.1016/j.matdes.2013.02.078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study aimed at investigating the structural, electrical resistivity and hardness changes of aged Al-Zn-Mg alloys. It was observed that the isothermal annealing in temperature range of 25-200 degrees C leads to the following precipitation sequence: Guinier-Preston zones -> eta'-phase -> eta-phase. The significant increase of electrical resistivity (rho) of the considered alloys was associated with the stage of GP zone decomposition. The formation of the intermediate eta'-phase was accompanied with a decrease of electrical resistivity and an increase of hardness. Non-continuous quenching was found to suppress the eta'-phase formation; while elevated quenching rates led to the formation of uniformly distributed fine precipitates in the alloy bulk. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：606 / 612

页数：7

共 28 条

[1]

Afify N., 2011, MAT SCI APPL, V2, P427, DOI [10.4236/msa.2011.25056, DOI 10.4236/MSA.2011.25056]

[2]

Askeland R., 2003, SCI ENG MAT, P366

[3] GP-zones in Al-Zn-Mg alloys and their role in artificial aging [J].

Berg, LK ;

Gjonnes, J ;

Hansen, V ;

Li, XZ ;

Knutson-Wedel, M ;

Waterloo, G ;

Schryvers, D ;

Wallenberg, LR .

ACTA MATERIALIA, 2001, 49 (17) :3443-3451

[4] Characterization of the mechanical properties changes in an Al-Zn-Mg alloy after a two-step ageing treatment at 70° and 135 °C [J].

Chemingui, Mahmoud ;

Khitouni, Mohamed ;

Jozwiak, Karol ;

Mesmacque, Gerard ;

Kolsi, Abdelwaheb .

MATERIALS & DESIGN, 2010, 31 (06) :3134-3139

[5]

Davies G., 2003, Materials for Automobile Bodies, P61, DOI DOI 10.1016/B978-075065692-4/50020-0

[6]

Davis J.R., 1993, Aluminum and Aluminum Alloys

[7] Influence of quench and heating rates on the ageing response of an Al-Zn-Mg-(Zr) alloy [J].

Deschamps, A ;

Brechet, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 251 (1-2) :200-207

[8] A comparative study of precipitate composition and volume fraction in an Al-Zn-Mg alloy using tomographic atom probe and small-angle X-ray scattering [J].

Deschamps, A ;

Bigot, A ;

Livet, F ;

Auger, P ;

Bréchet, Y ;

Blavette, D .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2001, 81 (10) :2391-2414

[9]

Du ZW, 2005, J MATER SCI TECHNOL, V21, P479

[10] Quantitative analysis of precipitation in an Al-Zn-Mg-Cu-Li alloy [J].

Du, ZW ;

Zhou, TT ;

Chen, CQ ;

Liu, PY ;

Dong, BZ .

MATERIALS CHARACTERIZATION, 2005, 55 (01) :75-82

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