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Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy
Ye GG(叶贵根); Xue SF(薛世峰); Jiang MQ(蒋敏强); Tong XH(仝兴华); Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF PLASTICITY
2013-01
Volume40Pages:39-55
ISSN0749-6419
AbstractCutting experiments were performed on Ti-6Al-4V alloy over a wide range of cutting speeds. The transition of chip morphology from continuous to serrated is observed with increasing the cutting speeds, which is found to be ascribed to a periodic shear band formation that caused by thermo-plastic instability occurred within the primary shear zone (PSZ). Further microscopic observations reveal that the spacing of these periodic shear bands, i.e., the segment spacing, is significantly related to the evolution degree of shear band which increases with increasing the cutting speed. Since the segment spacing is the most important parameter to characterize the chip serration, to predict the segment spacing is fundamentally useful for the understating of serrated chip formation mechanism. However, the complicated conditions of high speed machining (HSM) give rise to greater difficulties for the prediction of segment spacing, and there is still no theoretical prediction has yet considered the effect of shear band evolution. In this work, by analyzing the plastic deformation within the PSZ, and taking into account the evolution of shear band as well as the material convection caused by chip flow, a new theoretical model is developed to predict the segment spacing, in which the momentum diffusion due to unloading within the shear band had been considered. The predictions of this model were compared with the experimental and simulated results, which clearly reveal that the proposed model can satisfactorily capture the process of chip segmentation over a wide range of cutting speeds.
KeywordHigh Speed Machining Thermo-plastic Instability Segment Spacing Momentum Diffusion Shear Band
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000312230400003
Funding OrganizationNature Science Foundation of China [11132011, 11021262, 11002144]; National Basic Research Program of China [2012CB937500, 2009CB724401]; National Natural Science Foundation of China-NSAF [10976100]
DepartmentLNM冲击动力学与新型材料力学性能
Classification一类
Citation statistics
Cited Times:65[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47033
Collection非线性力学国家重点实验室
Corresponding AuthorDai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Ye GG,Xue SF,Jiang MQ,et al. Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2013,40:39-55.
APA 叶贵根,薛世峰,蒋敏强,仝兴华,戴兰宏,&Dai, LH .(2013).Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy.INTERNATIONAL JOURNAL OF PLASTICITY,40,39-55.
MLA 叶贵根,et al."Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy".INTERNATIONAL JOURNAL OF PLASTICITY 40(2013):39-55.
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