Dynamic shear response and evolution mechanisms of adiabatic shear band in an ultrafine-grained austenite-ferrite duplex steel
文献类型：期刊论文
| 作者 | Yuan, Fuping ; Bian, Xiangde; Jiang, Ping; Yang, Muxing; Wu, Xiaolei; Yang MX(杨沐鑫); Wu XL(武晓雷); Wu XL(武晓雷); Yuan FP(袁福平); Jiang P(姜萍)
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| 刊名 | MECHANICS OF MATERIALS
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| 出版日期 | 2015-10-01 |
| 卷号 | 89页码:47-58 |
| 通讯作者邮箱 | fpyuan@lnm.imech.ac.cn |
| 关键词 | Adiabatic shear band Dynamic properties TRIP Hat-shaped specimen Inverse transformation |
| ISSN号 | 0167-6636 |
| 产权排序 | [Yuan, Fuping; Bian, Xiangde; Jiang, Ping; Yang, Muxing; Wu, Xiaolei] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 North 4th Ring,West Rd, Beijing 100190, Peoples R China. |
| 中文摘要 | The dynamic properties of an intercritically annealed 0.2C5Mn steel with ultrafine-grained austenite-ferrite duplex structure were studied under dynamic shear loading. The formation and evolution mechanisms of adiabatic shear band in this steel were then investigated using interrupted experiments at five different shear displacements and the subsequent microstructure observations. The dynamic shear plastic deformation of the 0.2C5Mn steel was observed to have three stages: the strong linear hardening stage followed by the plateau stage, and then the strain softening stage associated with the evolution of adiabatic shear band. High impact shear toughness was found in this 0.2C5Mn steel, which is due to the following two aspects: the strong linear strain hardening by martensite transformation at the first stage, and the suppressing for the formation of shear band by the continuous deformation in different phases through the proper stress and strain partitioning at the plateau stage. The evolution of adiabatic shear band was found to be a two-stage process, namely an initiation stage followed by a thickening stage. The shear band consists of two regions at the thickening stage: a core region and two transition layers. When the adjoining matrix is localized into the transition layers, the grains are refined along with increasing fraction of austenite phase by inverse transformation. However, when the transition layers are transformed into the core region, the fraction of austenite phase is decreased and almost disappeared due to martensite transformation again. These interesting observations in the core region and the transition layers should be attributed to the competitions of the microstructure evolutions associated with the non-uniformly distributed shear deformation and the inhomogeneous adiabatic temperature rise in the different region of shear band. The 0.2C5Mn TRIP steel reported here can be considered as an excellent candidate for energy absorbers in the automotive industry. (C) 2015 Elsevier Ltd. All rights reserved. |
| 英文摘要 | The dynamic properties of an intercritically annealed 0.2C5Mn steel with ultrafine-grained austenite-ferrite duplex structure were studied under dynamic shear loading. The formation and evolution mechanisms of adiabatic shear band in this steel were then investigated using interrupted experiments at five different shear displacements and the subsequent microstructure observations. The dynamic shear plastic deformation of the 0.2C5Mn steel was observed to have three stages: the strong linear hardening stage followed by the plateau stage, and then the strain softening stage associated with the evolution of adiabatic shear band. High impact shear toughness was found in this 0.2C5Mn steel, which is due to the following two aspects: the strong linear strain hardening by martensite transformation at the first stage, and the suppressing for the formation of shear band by the continuous deformation in different phases through the proper stress and strain partitioning at the plateau stage. The evolution of adiabatic shear band was found to be a two-stage process, namely an initiation stage followed by a thickening stage. The shear band consists of two regions at the thickening stage: a core region and two transition layers. When the adjoining matrix is localized into the transition layers, the grains are refined along with increasing fraction of austenite phase by inverse transformation. However, when the transition layers are transformed into the core region, the fraction of austenite phase is decreased and almost disappeared due to martensite transformation again. These interesting observations in the core region and the transition layers should be attributed to the competitions of the microstructure evolutions associated with the non-uniformly distributed shear deformation and the inhomogeneous adiabatic temperature rise in the different region of shear band. The 0.2C5Mn TRIP steel reported here can be considered as an excellent candidate for energy absorbers in the automotive industry. (C) 2015 Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science ; Mechanics |
| 分类号 | 一类 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics |
| 研究领域[WOS] | Materials Science ; Mechanics |
| 关键词[WOS] | TRANSFORMATION-INDUCED PLASTICITY ; DUAL-PHASE STEELS ; INDUCED MARTENSITIC-TRANSFORMATION ; ASSISTED MULTIPHASE STEELS ; HIGH-PRESSURE TORSION ; UNIAXIAL COMPRESSION ; MULTISCALE MECHANICS ; TRIP/TWIP STEELS ; STRAIN-RATE ; 5MN STEEL |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1016/j.mechmat.2015.06.004 |
| 语种 | 英语 |
| WOS记录号 | WOS:000359962400005 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/55316]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Fuping,Bian, Xiangde,Jiang, Ping,et al. Dynamic shear response and evolution mechanisms of adiabatic shear band in an ultrafine-grained austenite-ferrite duplex steel[J]. MECHANICS OF MATERIALS,2015,89:47-58. |
| APA | Yuan, Fuping.,Bian, Xiangde.,Jiang, Ping.,Yang, Muxing.,Wu, Xiaolei.,...&Bian XD.(2015).Dynamic shear response and evolution mechanisms of adiabatic shear band in an ultrafine-grained austenite-ferrite duplex steel.MECHANICS OF MATERIALS,89,47-58. |
| MLA | Yuan, Fuping,et al."Dynamic shear response and evolution mechanisms of adiabatic shear band in an ultrafine-grained austenite-ferrite duplex steel".MECHANICS OF MATERIALS 89(2015):47-58. |
入库方式： OAI收割
来源：力学研究所
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