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Effects of the phase interface on initial spallation damage nucleation and evolution in dual phase titanium alloy
Yang Y; Jiang Z; Wang C; Hu HB; Tang TG; Zhang HS(张虎生); Fu YN
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2018-07-25
Volume731Pages:385-393
ISSN0921-5093
Abstract

The Ti-6Al-4V dual phase alloy samples were dynamic loaded by one-stage light gas gun experiment and samples with initial spallation were softly recovered. During the loading experiment, the velocity of free surface particles was measured by photonic doppler velocimetry (PDV). The effect of alpha/beta phase interface on nucleation, growth, and coalescence of dynamic damage in Ti-6Al.4V were investigated by 2-D or 3-D testing techniques, such as optical microscopy(OM), x-ray computer tomography(XRCT), and electron backscattered diffraction(EBSD). The results showed that the majority of voids were nucleated within a phases, rather than on the alpha/beta phase interface as predicted by quasi-static damage theory. Due to the effects of reflection and transmission of shock wave at the phase interface, a tensile pulse would be formed within a phase when the shock wave transmit from a phase with high impedance to 13 phase with low impedance. When this tensile pulse was large enough, voids would be formed within a phase. The analyses of OM and XRCT indicated that the voids at the beginning of nucleation were nearly spherical, then grew up along the direction of 45 degrees with the shock loading direction, and finally the rod-shaped voids were formed. Besides, the voids were not randomly nucleated within a phase, and the EBSD analysis showed that the voids were mainly nucleated at grain boundary triple points which composed of grains with large difference of Taylor Factor(TF) value within a phase. This is because the difference of plastic deformation capacity of this grains is larger, and it is easier to produce stress concentration. Thus these sites became the prior nucleation position of voids.

KeywordSpallation Phase Interface Voids Nucleation Xrct Ebsd Ti-6al-4v
DOI10.1016/j.msea.2018.06.066
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000440881000042
WOS KeywordHigh-purity Copper ; Sweeping Detonation ; Behavior ; Failure ; Deformation ; Fatigue ; Metals ; Strain
WOS Research AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51274245, 51574290] ; NSAF [U1330126] ; Opening fund of State Key Laboratory of Nonlinear Mechanics
Classification一类
Ranking5+
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77833
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Yang Y,Jiang Z,Wang C,et al. Effects of the phase interface on initial spallation damage nucleation and evolution in dual phase titanium alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,731:385-393.
APA Yang Y.,Jiang Z.,Wang C.,Hu HB.,Tang TG.,...&Fu YN.(2018).Effects of the phase interface on initial spallation damage nucleation and evolution in dual phase titanium alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,731,385-393.
MLA Yang Y,et al."Effects of the phase interface on initial spallation damage nucleation and evolution in dual phase titanium alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 731(2018):385-393.
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