Observations and issues on mechanisms of grain refinement during ECAP process

被引：364

作者：

Zhu, YT ^{[1
]}

Lowe, TC ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 291卷 / 1-2期

关键词：

grain refinement; equal channel angular pressing; mechanisms;

D O I：

10.1016/S0921-5093(00)00978-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The equal channel angular pressing route, defined by rotating schemes between adjacent passes, significantly affects effectiveness of grain refinement. It is of interest to study the mechanisms of grain refinement. Previous work has considered the accumulative strain and the effects of shear strain plane in the interpretation of certain experimental observations. However, they are not sufficiently general, and contradict each other in some cases. In this paper, we analyze experimental results available in the literature, and investigate the fundamental mechanisms of grain refinement. We believe that the interaction of shear plane with texture and crystal structure plays a primary role in grain refinement, while the accumulative strain plays a secondary role. Our model can explain the experimental results in the literature very well. Issues on the grain refinement are discussed and further research to solve these issues is suggested. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：46 / 53

页数：8

共 46 条

[1] The influence of texture on the elastic properties of ultrafine-grain copper [J].

Agnew, SR ;

Weertman, JR .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 242 (1-2) :174-180

[2]

AGNEW SR, 1998, P 19 RIS INT S MAT S, P201

[3] Microstructures and properties of nanocomposites obtained through SPTS consolidation of powders [J].

Alexandrov, IV ;

Zhu, YT ;

Lowe, TC ;

Islamgaliev, RK ;

Valiev, RZ .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (09) :2253-2260

[4] Microstructure development during equal channel angular drawing of Al at room temperature [J].

Chakkingal, U ;

Suriadi, AB ;

Thomson, PF .

SCRIPTA MATERIALIA, 1998, 39 (06) :677-684

[5] The effect of strain path on material behaviour during hot rolling of FCC metals [J].

Davenport, SB ;

Higginson, RL ;

Sellars, EM .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1999, 357 (1756) :1645-1660

[6] Hot working of Ti-6Al-4V via equal channel angular extrusion [J].

DeLo, DP ;

Semiatin, SL .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (09) :2473-2481

[7]

DRIVER JH, 1994, MATER SCI FORUM, V157-1, P585, DOI 10.4028/www.scientific.net/MSF.157-162.585

[8] Microstructure and properties of copper and aluminum alloy 3003 heavily worked by equal channel angular extrusion [J].

Ferrasse, S ;

Segal, VM ;

Hartwig, KT ;

Goforth, RE .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1997, 28 (04) :1047-1057

[9] Development of a submicrometer-grained microstructure in aluminum 6061 using equal channel angular extrusion [J].

Ferrasse, S ;

Segal, VM ;

Hartwig, KT ;

Goforth, RE .

JOURNAL OF MATERIALS RESEARCH, 1997, 12 (05) :1253-1261

[10]

FIELD RD, 1999, 1999 FALL TMS M CINC

← 1 2 3 4 5 →