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Micro-scale measurements of plastic strain field, and local contributions of slip and twinning in TWIP steels during in situ tensile tests
Yang, HK; Doquet, V; Zhang, ZF; Doquet, V (reprint author), Univ Paris Saclay, Ecole Polytech, Lab Mecan Solides, CNRS,UMR7649, F-91128 Palaiseau, France.
2016-08-30
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume672Pages:7-14
AbstractIn-situ tensile tests were carried out on Fe22Mn0.6C and Fe22Mn0.6C3Al (wt%) twinning-induced plasticity (TWIP) steels specimens covered with gold micro-grids. High resolution atomic force microscopy (AFM) and scanning electron microscope (SEM) images were periodically captured. The latter were used for measurements of the plastic strain field, using digital image correlation (DIC). Although no meso-scale localization bands appeared, some areas were deformed three times more than average. Plastic deformation inside the grains was more heterogeneous in Fe22Mn0.6C, but at meso-scale, the degree of strain heterogeneity was not higher, at least up to 12% strain. Plastic deformation started from grain boundaries or annealing twin boundaries in both materials, due to a high elastic anisotropy of the grains. An original method based on DIC was developed to estimate the twin fraction in grains that exhibit a single set of slip/twin bands. Deformation twinning accommodated 60-80% of the plastic strain in some favorably oriented grains, from the onset of plastic flow in Fe22Mn0.6C, but was not observed in the Al-bearing steel until 12% strain. The back stress was important in both materials, but significantly higher in Fe22Mn0.6C. (C) 2016 Elsevier B.V. All rights reserved.
description.department[yang, h. k. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [yang, h. k. ; doquet, v.] univ paris saclay, ecole polytech, lab mecan solides, cnrs,umr7649, f-91128 palaiseau, france
KeywordTwip Steel Twinning Back Stress Strain Heterogeneity Digital Image Correlation
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationChinese Academy of Sciences (CAS); Centre National de la Recherche Scientifique (CNRS)
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76297
Collection中国科学院金属研究所
Corresponding AuthorDoquet, V (reprint author), Univ Paris Saclay, Ecole Polytech, Lab Mecan Solides, CNRS,UMR7649, F-91128 Palaiseau, France.
Recommended Citation
GB/T 7714
Yang, HK,Doquet, V,Zhang, ZF,et al. Micro-scale measurements of plastic strain field, and local contributions of slip and twinning in TWIP steels during in situ tensile tests[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,672:7-14.
APA Yang, HK,Doquet, V,Zhang, ZF,&Doquet, V .(2016).Micro-scale measurements of plastic strain field, and local contributions of slip and twinning in TWIP steels during in situ tensile tests.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,672,7-14.
MLA Yang, HK,et al."Micro-scale measurements of plastic strain field, and local contributions of slip and twinning in TWIP steels during in situ tensile tests".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 672(2016):7-14.
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