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Fatigue crack growth in two TWIP steels with different stacking fault energies
Yang, H. K.; Doquet, V.; Zhang, Z. F.; Doquet, V (reprint author), Univ Paris Saclay, Lab Mecan Solides, Ecole Polytech, CNRS UMR7649, F-91128 Palaiseau, France.
2017-05-01
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
ISSN0142-1123
Volume98Pages:247-258
AbstractFatigue crack growth tests with R = 0 and 0.4 were carried out on Fe-22Mn-0.6C and Fe-22Mn-0.6C-3A1 (wt.%) Twinning-Induced Plasticity (TWIP) steels with stacking fault energies around 21.5 and 37 ml/m(2), respectively. The former exhibits more crack closure effects, partly due to stronger asperity-induced closure. Strain-controlled push-pull tests followed by scanning electron microscope observations show that both steels are prone to mechanical twinning under low-cycle fatigue, associated with an increasing kinematic hardening. Twinning is however more profuse in Fe-22Mn-0.6C steel. Elastic-plastic finite elements simulations of crack growth, using specific constitutive equations able to capture the increasing kinematic hardening suggest that plasticity-induced crack closure is lower in Fe-22Mn-0.6C steel. Even after closure corrections, the Al-free steel, exhibits a lower resistance to fatigue crack growth, which is attributed to a pronounced strain localisation at the crack tip, and maybe also to environment effects. (C) 2017 Elsevier Ltd. All rights reserved.; Fatigue crack growth tests with R = 0 and 0.4 were carried out on Fe-22Mn-0.6C and Fe-22Mn-0.6C-3A1 (wt.%) Twinning-Induced Plasticity (TWIP) steels with stacking fault energies around 21.5 and 37 ml/m(2), respectively. The former exhibits more crack closure effects, partly due to stronger asperity-induced closure. Strain-controlled push-pull tests followed by scanning electron microscope observations show that both steels are prone to mechanical twinning under low-cycle fatigue, associated with an increasing kinematic hardening. Twinning is however more profuse in Fe-22Mn-0.6C steel. Elastic-plastic finite elements simulations of crack growth, using specific constitutive equations able to capture the increasing kinematic hardening suggest that plasticity-induced crack closure is lower in Fe-22Mn-0.6C steel. Even after closure corrections, the Al-free steel, exhibits a lower resistance to fatigue crack growth, which is attributed to a pronounced strain localisation at the crack tip, and maybe also to environment effects. (C) 2017 Elsevier Ltd. All rights reserved.
description.department[yang, h. k. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [yang, h. k. ; doquet, v.] univ paris saclay, lab mecan solides, ecole polytech, cnrs umr7649, f-91128 palaiseau, france
KeywordTwip Steel Fatigue Crack Growth Crack Closure Mechanical Twinning Kinematic Hardening
Subject AreaEngineering, Mechanical ; Materials Science, Multidisciplinary
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/321006/78170
Collection中国科学院金属研究所
Corresponding AuthorDoquet, V (reprint author), Univ Paris Saclay, Lab Mecan Solides, Ecole Polytech, CNRS UMR7649, F-91128 Palaiseau, France.
Recommended Citation
GB/T 7714
Yang, H. K.,Doquet, V.,Zhang, Z. F.,et al. Fatigue crack growth in two TWIP steels with different stacking fault energies[J]. INTERNATIONAL JOURNAL OF FATIGUE,2017,98:247-258.
APA Yang, H. K.,Doquet, V.,Zhang, Z. F.,&Doquet, V .(2017).Fatigue crack growth in two TWIP steels with different stacking fault energies.INTERNATIONAL JOURNAL OF FATIGUE,98,247-258.
MLA Yang, H. K.,et al."Fatigue crack growth in two TWIP steels with different stacking fault energies".INTERNATIONAL JOURNAL OF FATIGUE 98(2017):247-258.
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