Softening behaviour of nanostructured Al-14 wt% Zn alloy during mechanical alloying

被引：39

作者：

Tavoosi, M. ^{[1
]}

Enayati, M. H. ^{[1
]}

Karimzadeh, F. ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 464卷 / 1-2期

关键词：

nanostructured materials; mechanical alloying; Al-Zn alloys;

D O I：

10.1016/j.jallcom.2007.09.119

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al and Zn elemental powder mixtures were subjected to high-energy milling to produce Al-14 wt% Zn alloy. The milled powders were characterized by scanning electron microscopy (SEMI), X-ray diffraction (XRD) and microhardness Measurement. The Al and Zn grain sizes were estimated from broadening of XRD peaks using Williamson-Hall formula. The results showed that in early stage of milling the solubility of Zn in Al is extended compared to the equilibrium value which is accompanied by a decrease in lattice parameter of the Al matrix. However, after longer milling times, decomposition of Al(Zn) supersaturated solid Solution appeared to occur leading to an increase in Al lattice parameter and also a decrease in hardness value of as-milled powder. The final product of milling includes both Al and Zn phases having a grain size of 40nm and 20 nm, respectively. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：107 / 110

页数：4

共 13 条

[1] THE KINETICS OF COMPOSITE PARTICLE FORMATION DURING MECHANICAL ALLOYING [J].

AIKIN, BJM ;

COURTNEY, TH .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1993, 24 (03) :647-657

[2]

BENJAMIN JS, 1970, METALL TRANS, V1, P2943

[3] MECHANISM OF MECHANICAL ALLOYING [J].

BENJAMIN, JS ;

VOLIN, TE .

METALLURGICAL TRANSACTIONS, 1974, 5 (08) :1929-1934

[4] THERMAL-STABILITY AND GRAIN-GROWTH BEHAVIOR OF MECHANICALLY ALLOYED NANOCRYSTALLINE FE-CU ALLOYS [J].

ECKERT, J ;

HOLZER, JC ;

JOHNSON, WL .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (01) :131-141

[5] Solid solution in Al-4.5 wt% Cu produced by mechanical alloying [J].

Fogagnolo, J. B. ;

Amador, D. ;

Ruiz-Navas, E. M. ;

Torralba, J. M. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 433 (1-2) :45-49

[6] Effect of mechanical alloying on the morphology, microstructure and properties of aluminium matrix composite powders [J].

Fogagnolo, JB ;

Velasco, F ;

Robert, MH ;

Torralba, JM .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 342 (1-2) :131-143

[7] The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure torsion [J].

Ivanisenko, Y ;

Lojkowski, W ;

Valiev, RZ ;

Fecht, HJ .

ACTA MATERIALIA, 2003, 51 (18) :5555-5570

[8] Overview paper no. 2. The synthesis and structure of nanocrystalline materials produced by mechanical attrition. A review [J].

Koch, C.C. .

Nanostructured Materials, 1993, 2 (02)

[9] Softening of nanostructured Al-Zn and Al-Mg alloys after severe plastic deformation [J].

Mazilkin, A. A. ;

Straumal, B. B. ;

Rabkin, E. ;

Baretzky, B. ;

Enders, S. ;

Protasova, S. G. ;

Kogtenkova, O. A. ;

Valiev, R. Z. .

ACTA MATERIALIA, 2006, 54 (15) :3933-3939

[10] Mechanical alloying and milling [J].

Suryanarayana, C .

PROGRESS IN MATERIALS SCIENCE, 2001, 46 (1-2) :1-184

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