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Dynamic mechanical response and microstructural evolution of extruded Mg AZ31B plate over a wide range of strain rates
Zhang WG; Ye YC; He LJ; Li PJ; Zhang HS(张虎生); Zhang, WG (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.; Zhang, HS (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
2017
Volume696Pages:1067-1079
ISSN0925-8388
AbstractIn this research, the mechanical behaviors of extruded AZ31B Mg plate along normal direction (ND) were investigated over a wide range of strain rates. High strain rate tests were carried out using a split Hopkinson pressure bar at room temperature. The corresponding deformation mechanisms, texture evolution and microstructure changes were analyzed by utilizing optical microscope (OM), X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). It is found that the mechanical responses exhibit both sigmoidal hardening and power-law hardening behaviors under compression at high strain rate ranges of 1068-5647 s(-1). The prismatic type textures of the skin layer and center layer of the AZ31B plate determine its mechanical behaviors. The sigmoidal hardening behaviors are resulted from the formation and development of {10-12} extension twinning at the initial stage of deformation. Whereas the power-law hardening behaviors are resulted from non-basal < c+a > dislocation slip dominated the deformation at the initial deformation stage. Experimental results indicate the critical resolved shear stress (CRSS) for extension twinning and non-basal < c+a > dislocation slip are insensitive to strain rate, but the latter CRSS is significantly higher than the former CRSS. The flow stress is insensitive to strain rate if plastic deformation is dominated by extension twinning, while it increases with the increase of strain rate if plastic deformation is dominated by nonbasal < c+a > dislocation slip. Dynamic recrystallization (DRX) took place if the AZ31B plate was compressed at strain ranges of 4737-5647 s(-1), resulting in a decrease in flow stress and a significant increase in ductility. (C) 2016 Elsevier B.V. All rights reserved.
KeywordExtruded Az31b Plate Gradient Texture Dynamic Mechanical Behavior Deformation Mechanism Microstructural Evolution
DOI10.1016/j.jallcom.2016.12.041
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000391819800140
WOS KeywordExtruded AZ31B plate ; Gradient texture ; Dynamic mechanical behavior ; Deformation mechanism ; Microstructural evolution
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51471090]
DepartmentLNM实验平台
Classification一类
Ranking1
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59963
Collection非线性力学国家重点实验室
Corresponding AuthorZhang, WG (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.; Zhang, HS (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhang WG,Ye YC,He LJ,et al. Dynamic mechanical response and microstructural evolution of extruded Mg AZ31B plate over a wide range of strain rates[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,696:1067-1079.
APA Zhang WG.,Ye YC.,He LJ.,Li PJ.,张虎生.,...&Zhang, HS .(2017).Dynamic mechanical response and microstructural evolution of extruded Mg AZ31B plate over a wide range of strain rates.JOURNAL OF ALLOYS AND COMPOUNDS,696,1067-1079.
MLA Zhang WG,et al."Dynamic mechanical response and microstructural evolution of extruded Mg AZ31B plate over a wide range of strain rates".JOURNAL OF ALLOYS AND COMPOUNDS 696(2017):1067-1079.
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