A finite element analysis of strain induced transformation rolling and an experimental study on the grain refinement potential of severe undercooling thermo-mechanical treatment

被引：11

作者：

Huang, CJ ^{[1
]}

Li, DZ ^{[1
]}

Li, YY ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 352卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

ultra-fine grains; hot rolling; severe undercooling; thermo-mechanical treatment;

D O I：

10.1016/S0921-5093(02)00907-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A finite element analysis was performed to study the strain induced transformation rolling process through which ultra-fine-grain steels were produced. Within the surface layer of the specimen, where ultra-fined grains were found, high strain and severe undercooling were found to coexist during hot deformation. It is proposed in this paper that the ultra-refinement was caused by the deformation of austenite in a severely undercooled state. To verify the grain refinement potential of severe undercooling thermomechanical treatment, hot compression experiments were done on a Gleeble1500 thermo-mechanical simulator. Severe undercooling was obtained by cooling the specimens at very high cooling rate before deformation. Metallographic observations showed that ultrafine grains could be obtained at a true strain of 0.9 provided that undercooling was higher than 200 K. (C) 2002 Published by Elsevier Science B.V.

引用

页码：136 / 143

页数：8

共 24 条

[1]

ADACHI Y, 2000, ISIJ INT, V40, pS194

[2]

Beynon J. H., 1992, Materials Forum, V16, P37

[3] Processing to ultrafine grain structures by conventional routes [J].

Gholinia, A ;

Humphreys, FJ ;

Prangnell, PB .

MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1251-1255

[4]

HICKSON RM, 1999, SCRIPTA MATER, V40, P1176

[5] Ultrafine ferrite in low carbon steel [J].

Hodgson, PD ;

Hickson, MR ;

Gibbs, RK .

SCRIPTA MATERIALIA, 1999, 40 (10) :1179-1184

[6] The production and mechanical properties of ultrafine ferrite [J].

Hodgson, PD ;

Hickson, MR ;

Gibbs, RK .

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MICROALLOYING IN STEELS, 1998, 284-2 :63-72

[7] Ultrafine grained steels: industrial prospects [J].

Howe, AA .

MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1264-1266

[8] Microstructure and microtexture of ultrafine ferrite formed in 0•1%C steel using new strip rolling process [J].

Hurley, PJ ;

Muddle, BC ;

Hodgson, PD .

MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1376-1379

[9] Ultrafine ferrite formation during hot strip rolling [J].

Hurley, PJ ;

Kelly, GL ;

Hodgson, PD .

MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1273-1276

[10] Nucleation sites for ultrafine ferrite produced by deformation of austenite during single-pass strip rolling [J].

Hurley, PJ ;

Muddle, BC ;

Hodgson, PD .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (06) :1507-1517

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