Local plastic strain evolution in a high strength dual-phase steel

被引：233

作者：

Ghadbeigi, H. ^{[1
]}

Pinna, C. ^{[1
]}

Celotto, S. ^{[2
]}

Yates, J. R. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mech Engn, Sheffield S1 3JD, S Yorkshire, England

[2] Corus RD&T, Ijmuiden, Netherlands

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 18-19期

基金：

英国工程与自然科学研究理事会;

关键词：

Steel; Failure; Micromechanics; Mechanical characterisation; Electron microscopy; Strain measurement; DIGITAL IMAGE CORRELATION; DAMAGE;

D O I：

10.1016/j.msea.2010.04.052

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The evolution of local plastic deformation in a dual-phase (DP) steel has been studied using Digital Image Correlation (DIC) and in-situ tensile testing inside a scanning electron microscope. Tests were performed using specially designed samples to study the initiation and evolution of damage in DP1000 steel by measuring the strains at the scale of the microstructure. Micrographs have been analysed using DIC at different stages throughout a tensile test to measure local strain distributions within the ferrite-martensite microstructure. The results show progressive localisation of deformation into bands orientated at 45 degrees with respect to the loading direction. Strain magnitudes are higher in the ferrite phase with local values reaching up to 120%. Several mechanisms for damage initiation are identified and related to the local strains in this steel. The procedure used and the results obtained in this work may help the development of models aimed at predicting the properties of new generation automotive steels. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：5026 / 5032

页数：7

共 12 条

[1]

Gerbase J., 1979, STRUCTURE PROPERTIES, P118

[2]

GLADMAN T, 1997, METALLURGY MICROALLO

[3] Micro-scale deformation measurement using the digital image correlation technique and scanning electron microscope imaging [J].

Jin, H. ;

Lu, W-Y ;

Korellis, J. .

JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, 2008, 43 (08) :719-728

[4] Digital image correlation studies for microscopic strain distribution and damage in dual phase steels [J].

Kang, Jidong ;

Ososkov, Yuriy ;

Embury, J. David ;

Wilkinson, David S. .

SCRIPTA MATERIALIA, 2007, 56 (11) :999-1002

[5]

KOO JY, 1977, FORMABLE HSLA DUAL P, P40

[6]

*LAVISION, 2005, DAVIS STRAIN MAST SO

[7] Initiation and growth of damage in a dual-phase steel observed by X-ray microtomography [J].

Maire, E. ;

Bouaziz, O. ;

Di Michiel, M. ;

Verdu, C. .

ACTA MATERIALIA, 2008, 56 (18) :4954-4964

[8] In-situ measurement of local strain partitioning in a commercial dual-phase steel [J].

Ososkov, Yuriy ;

Wilkinson, David S. ;

Jain, Mukesh ;

Simpson, Todd .

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2007, 98 (08) :664-673

[9]

Rashid M., 1977, SOC AUTOENG CONG, P938

[10] Physical metallurgy of modern high strength steel sheets [J].

Senuma, T .

ISIJ INTERNATIONAL, 2001, 41 (06) :520-532

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