High-temperature deformation of the γ-Mg17Al12 complex metallic alloy

被引：55

作者：

Ragani, J. ^{[1
]}

Donnadieu, P. ^{[1
]}

Tassin, C. ^{[1
]}

Blandin, J. J. ^{[1
]}

机构：

[1] UMR CNRS Grenoble INP UJF, F-38402 St Martin Dheres, France

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 03期

关键词：

Complex metallic alloy (CMA); Al2 structure type; Mg-Al alloys; Mg17Al12; phase; High-temperature deformation; LAVES PHASE CR2NB; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; CRYSTAL-STRUCTURE; QUASI-CRYSTALS; BEHAVIOR; DISLOCATIONS; PARAMETERS; MODEL;

D O I：

10.1016/j.scriptamat.2011.04.022

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report initial results on high-temperature deformation of a complex metallic alloy, the gamma-Mg17Al12 phase, isostructural with alpha-Mn. Although, like all complex metallic alloys, the gamma-Mg17Al12, phase is brittle at room temperature, a high deformability accompanied by a strong softening was observed above 573 K (similar to 2/3melting point). Transmission electron microscopy investigation indicates that dislocation climb should be involved in the deformation mechanisms. Similarities with the deformation behaviour of quasicrystals and metallic glasses are discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：253 / 256

页数：4

共 33 条

[1] THE CRYSTAL STRUCTURE OF THE METALLIC PHASE MG32 (A1,ZN) [J].

BERGMAN, G ;

WAUGH, JLT ;

PAULING, L .

ACTA CRYSTALLOGRAPHICA, 1957, 10 (04) :254-259

[2] Free volume model: High-temperature deformation of a Zr-based bulk metallic glass [J].

Bletry, M ;

Guyot, P ;

Blandin, JJ ;

Soubeyroux, JL .

ACTA MATERIALIA, 2006, 54 (05) :1257-1263

[3] The crystal structure of alpha-manganese [J].

Bradley, AJ ;

Thewlis, J .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1927, 115 (771) :456-471

[4] PLASTIC-DEFORMATION IN ALCUFE ICOSAHEDRAL PHASE [J].

BRESSON, L ;

GRATIAS, D .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1993, 153 :468-472

[5] Dislocations in complex materials [J].

Chisholm, MF ;

Kumar, S ;

Hazzledine, P .

SCIENCE, 2005, 307 (5710) :701-703

[6] DEFORMATION TWINNING IN INTERMETALLIC COMPOUNDS - THE DILEMMA OF SHEARS VS SHUFFLES [J].

CHU, FM ;

POPE, DP .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 170 (1-2) :39-47

[7] Structural disordering in amorphous Pd40Ni40P20 induced by high temperature deformation [J].

De Hey, P ;

Sietsma, J ;

Van den Beukel, A .

ACTA MATERIALIA, 1998, 46 (16) :5873-5882

[8] COMPLEX ALLOY STRUCTURES REGARDED AS SPHERE PACKINGS .1. DEFINITIONS AND BASIC PRINCIPLES [J].

FRANK, FC ;

KASPER, JS .

ACTA CRYSTALLOGRAPHICA, 1958, 11 (03) :184-190

[9] COMPLEX ALLOY STRUCTURES REGARDED AS SPHERE PACKING .2. ANALYSIS AND CLASSIFICATION OF REPRESENTATIVE STRUCTURES [J].

FRANK, FC ;

KASPER, JS .

ACTA CRYSTALLOGRAPHICA, 1959, 12 (07) :483-499

[10] Plastic behaviour of icosahedral Al-Cu-Fe quasicrystals: Experiment and modelling [J].

Giacometti, E ;

Guyot, P ;

Baluc, N ;

Bonneville, J .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 319 :429-433

← 1 2 3 4 →