Extended twinning phenomena in Al-4%Mg alloys/B4C nanocomposite

被引：22

作者：

Li, Y. ^{[1
]}

Lin, Y. J. ^{[1
,2
,3
]}

Xiong, Y. H. ^{[1
]}

Schoenung, J. M. ^{[1
]}

Lavernia, E. J. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China

[3] Yanshan Univ, Coll Mat Sci & Engn, Qinhuangdao 066004, Hebei, Peoples R China

来源：

SCRIPTA MATERIALIA | 2011年 / 64卷 / 02期

关键词：

Transmission electron microscopy (TEM); High-resolution electron microscopy (HREM); Composites; Aluminum alloys; AL-MG ALLOY; MOLECULAR-DYNAMICS SIMULATION; STACKING-FAULT ENERGY; HIGH-PRESSURE TORSION; NANOCRYSTALLINE AL; DEFORMATION MECHANISM; MATRIX COMPOSITES; STRAIN-RATE; STRENGTH; ALUMINUM;

D O I：

10.1016/j.scriptamat.2010.09.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Extended twins, up to 100 nm in length and occupying the length of an entire grain, are observed in an Al-4%Mg alloys/B4C nanocomposite material processed via high-temperature, high-strain-rate forging. High-resolution electron microscopy, used to identify the extended twins and to formulate the mechanism for their formation, indicates that they are created by the emission of 1/6(1 1 2) twinning partial dislocations. The macroscopic origin is attributed to the local high stress field present during the forging process. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：133 / 136

页数：4

共 32 条

[1] Deformation mechanism transitions in nanoscale fcc metals [J].

Asaro, RJ ;

Krysl, P ;

Kad, B .

PHILOSOPHICAL MAGAZINE LETTERS, 2003, 83 (12) :733-743

[2] Observation of atomic diffusion at twin-modified grain boundaries in copper [J].

Chen, Kuan-Chia ;

Wu, Wen-Wei ;

Liao, Chien-Neng ;

Chen, Lih-Juann ;

Tu, K. N. .

SCIENCE, 2008, 321 (5892) :1066-1069

[3] Deformation twinning in nanocrystalline aluminum [J].

Chen, MW ;

Ma, E ;

Hemker, KJ ;

Sheng, HW ;

Wang, YM ;

Cheng, XM .

SCIENCE, 2003, 300 (5623) :1275-1277

[4] DEFORMATION TWINNING [J].

CHRISTIAN, JW ;

MAHAJAN, S .

PROGRESS IN MATERIALS SCIENCE, 1995, 39 (1-2) :1-157

[5] Discrete and continuous deformation during nanoindentation of thin films [J].

Gouldstone, A ;

Koh, HJ ;

Zeng, KY ;

Giannakopoulos, AE ;

Suresh, S .

ACTA MATERIALIA, 2000, 48 (09) :2277-2295

[6] Nanoindentation - Simulation of defect nucleation in a crystal [J].

Gouldstone, A ;

Van Vliet, KJ ;

Suresh, S .

NATURE, 2001, 411 (6838) :656-656

[7] Mechanical milling-induced deformation twinning in Fcc materials with high stacking fault energy [J].

He, JH ;

Chung, KH ;

Liao, XZ ;

Zhu, YT ;

Lavernia, EJ .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34 (03) :707-712

[8] THE ULTIMATE TENSILE-STRENGTH OF METAL AND CERAMIC MATRIX COMPOSITES [J].

HE, MY ;

EVANS, AG ;

CURTIN, WA .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (03) :871-878

[9] High strain rate compression response of carbon/epoxy laminate composites [J].

Hosur, MV ;

Alexander, J ;

Vaidya, UK ;

Jeelani, S .

COMPOSITE STRUCTURES, 2001, 52 (3-4) :405-417

[10] The deformation behaviour and microstructure evolution of high-strength alloy steel at high rate of strain [J].

Lee, WS ;

Lam, HF .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1996, 57 (3-4) :233-240

← 1 2 3 4 →