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Title:
On the instability of chip flow in high-speed machining
Author: Ye GG(叶贵根); Jiang MQ(蒋敏强); Xue SF; Ma W(马维); Dai LH(戴兰宏)
Source: MECHANICS OF MATERIALS
Issued Date: 2018
Volume: 116, Pages:104-119
Abstract: High cutting speed usually gives rise to a breakdown of steady chip flow and results in a serrated flow pattern, which is one of the most fundamental and challenging problems in metal cutting. Here, we systematically analysed the experimental results of high-speed cutting on various typical metallic materials over wide ranges of cutting speeds. With considering the coupling effects of inertial, tool-chip compression and material convection, the critical condition for the onset of serrated chip flow is determined based on a stability analysis of the deformation inside primary shear zone. It is found that the emergence of the serrated chip flow is dominated by a dimensionless number which characterized the competition among the effects of inertia, thermal softening, strain hardening, elastic unloading, viscous diffusion and thermal diffusion. More interestingly, a power law between the serration frequency and the Reynolds thermal number Pe is clearly revealed. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword: High-speed machining ; Shear banding ; Serrated chip flow ; Thermoplastic instability
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1016/j.mechmat.2017.02.006
DOC Type: Article
WOS Subject: Materials Science, Multidisciplinary ; Mechanics
WOS Subject Extended: Materials Science ; Mechanics
WOS Keyword Plus: ADIABATIC SHEAR BANDS ; ALUMINUM-ALLOY A2024-T351 ; THERMOMECHANICAL RESPONSE ; CUTTING PROCESS ; STRAIN RATES ; INCONEL 718 ; 1045 STEEL ; LOCALIZATION ; EVOLUTION ; TI-6AL-4V
WOS ID: WOS:000419411100009
ISSN: 0167-6636
Funder: NSFC(11472287 ; Key Researh Program of Frontier Sciences(QYZDJSSW-JSC011) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040302) ; Fundamental Research Funds for the Central Universities(15CX02110A) ; 11132011 ; 11402278 ; 11572324 ; 11372315 ; 11522221)
Classification: 二类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/72248
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Ye GG,Jiang MQ,Xue SF,et al. On the instability of chip flow in high-speed machining[J]. MECHANICS OF MATERIALS,2018-01-01,116:104-119.
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