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IMECH-IR  > 流固耦合系统力学重点实验室(2012-)  > 期刊论文
Title: The chip-flow behaviors and formation mechanisms in the orthogonal cutting process of Ti6Al4V alloy
Author: Ma W(马维); Chen XY; Shuang F
Source: JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
Issued Date: 2017
Volume: 98, Pages:245-270
Abstract: This work involves experimental and analytical investigations of chip flow stability in metal cutting process. First, in cutting experiments of Ti6Al4V alloy, the transformation of chip morphology from continuous to serrated and later to discontinuous was observed as the cutting speed increased. Scanning electron microscopic (SEM) observation of the shear fracture surface demonstrated shear-localized instability and intergranular failure behaviors. Then we used the improved orthogonal cutting model (OCM) to analyze the plastic flow process of work materials in a plane strain state. A corresponding governing equation system was set up, the dimensionless governing parameters were determined by dimensional analysis, and an instability criterion was established by linear perturbation analysis. Analytical results showed that the plastic instability of chip flow could take place in a continuous chip, which is different from the shear-localized instability in a serrated chip. Finally, in terms of the balance conditions between the kinetic energy and the surface energy, the sawtooth growth behavior in serrated chips and the formation mechanism of discontinuous chips were studied.
Keyword: Metal orthogonal cutting ; Chip flow stability ; Plastic instability ; Shear deformation localization ; Instability criterion
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Ma, W (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
Correspondent Email: watwm@imech.ac.cn
DOI: 10.1016/j.jmps.2016.07.023
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS Subject Extended: Materials Science ; Mechanics ; Physics
WOS Keyword Plus: Metal orthogonal cutting ; Chip flow stability ; Plastic instability ; Shear deformation localization ; Instability criterion
WOS ID: WOS:000390972900014
ISSN: 0022-5096
Funder: Key National Nature Science Foundation of China [11132011] ; National Nature Science Foundation of China [11572337, 51575029]
Rank: [Ma, Wei; Chen, Xiangyu; Shuang, Fei] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
Department: LMFS工程地质体力学(LEM)
Classification: 一类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/59968
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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