Enhanced grain refinement due to deformation-induced precipitation during ambient-temperature severe plastic deformation of an Al-7%Si alloy

被引：35

作者：

Garcia-Infanta, J. M. ^{[1
]}

Swaminathan, S. ^{[2
]}

Cepeda-Jimenez, C. M. ^{[1
]}

McNelley, T. R. ^{[2
]}

Ruano, O. A. ^{[1
]}

Carreno, F. ^{[1
]}

机构：

[1] CSIC, Dept Met Phys, Ctr Nacl Invest Met CENIM, Madrid 28040, Spain

[2] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 478卷 / 1-2期

关键词：

Equal channel angular pressing (ECAP); Al-Si alloys; Severe plastic deformation; Deformation induced precipitation; Grain refinement; HIGH-PRESSURE TORSION; SI ALLOY; EVOLUTION; ALUMINUM; MICROSTRUCTURE; STRAIN;

D O I：

10.1016/j.jallcom.2008.11.047

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：

An Al-7wt%Si alloy was prepared by casting. Billets from the as-cast ingot were annealed at 540 degrees C and then either quenched or furnace cooled to control the Si concentration in the primary Al constituent. Subsequently, as-cast billets as well as billets in the annealed conditions were subjected to ambient temperature severe plastic deformation (SPD) by equal-channel angular pressing (ECAP). Microstructures were evaluated by optical. scanning electron, and transmission electron microscopy methods and Vickers hardness data were also acquired. Grain refinement and hardening in the primary Al by ambient temperature ECAP processing are influenced by deformation-induced precipitation of Si from a supersaturated solid solution. The finest grain size and highest hardness are associated with the greatest initial supersaturation of Si. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：139 / 143

页数：5

共 20 条

[1] The effect of dispersoids on the grain refinement mechanisms during deformation of aluminium alloys to ultra-high strains [J].

Apps, PJ ;

Berta, M ;

Prangnell, PB .

ACTA MATERIALIA, 2005, 53 (02) :499-511

[2]

*ASM, 1986, BIN ALL PHAS DIAGR

[3]

BELIO JMG, 2008, J ALLOY COMPD, DOI DOI 10.1016/J.4ALLCOM.2008.06.006

[4] NUCLEATION ON DISLOCATIONS [J].

CAHN, JW .

ACTA METALLURGICA, 1957, 5 (03) :169-172

[5] MECHANISM AND KINETICS OF STRAIN INDUCED PRECIPITATION OF NB(C, N) IN AUSTENITE [J].

DUTTA, B ;

VALDES, E ;

SELLARS, CM .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (04) :653-662

[6] Microhardness measurements and the Hall-Petch relationship in an Al-Mg alloy with submicrometer grain size [J].

Furukawa, M ;

Horita, Z ;

Nemoto, M ;

Valiev, RZ ;

Langdon, TG .

ACTA MATERIALIA, 1996, 44 (11) :4619-4629

[7] Microstructural development during equal channel angular pressing of hypo-eutectic Al-Si casting alloy by different processing routes [J].

Garcia-Infanta, J. M. ;

Swaminathan, S. ;

Zhilyaev, A. P. ;

Carreno, F. ;

Ruano, O. A. ;

McNelley, T. R. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 485 (1-2) :160-175

[8] Elongation increase in ultra-fine grained Al-Fe-Si alloy sheets [J].

Kim, HW ;

Kang, SB ;

Tsuji, N ;

Minamino, Y .

ACTA MATERIALIA, 2005, 53 (06) :1737-1749

[9] X-ray diffraction analysis of aluminium containing Al8Fe2Si processed by equal channel angular pressing [J].

Korchef, Atef ;

Champion, Yannick ;

Njah, Nabil .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 427 (1-2) :176-182

[10]

Mondolfo L.F., 1976, Aluminum Alloys: Structure and Properties, DOI DOI 10.1016/C2013-0-04239-9

← 1 2 →