Influence of Reinforced Particles on Chip Formation Process in Cutting SiCp/Al Metal Matrix Composites

DUAN Chunzheng;LIU Yumin;SUN Wei;CHE Mingfan

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2019, Vol. 40 ›› Issue (1) : 208-218. DOI: 10.3969/j.issn.1000-1093.2019.01.024
Research Notes

Influence of Reinforced Particles on Chip Formation Process in Cutting SiCp/Al Metal Matrix Composites

  • DUAN Chunzheng1， LIU Yumin2， SUN Wei1， CHE Mingfan1
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Abstract

A spring-loaded quick-stop device was designed to investigate the influence of SiC particles on the chip formation process of SiCp/Al composites. The chips and their roots are obtained by orthogonal cutting test, and their morphology and microstructure are observed. The arrangement mechanism of SiC particles along shear band, the fracture and breaking mechanisms of particles, the crack propagation and its influence on chip formation are analyzed. The results show that the acceleration of quick-stop device is large, which means that the chip roots obtained are effective, the force and torque generated by plastic sliding of matrix cause the particles to be arranged along the shear band, and the fractures of particles mainly occur in the shear zones, the separated surface of workpeice and chip, the second deformation zone and the machined surface near the tool nose. The microcracks initiating from the outside free surface and the interior of shear zone propagate along the shear plane. As the cracks propagate along the shear plane, the force applied on chips is unbalanced, which causes the chips to outflow fleetly, and the relative sliding of both sides of the cracks along the shear plane leads to the formation of irregular saw-tooth chips. Key

Key words

SiCp/Almetalmatrixcomposite / quick-stopdevice / particlesarrangement / particlefracture / crackpropagation / chipformation

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DUAN Chunzheng， LIU Yumin， SUN Wei， CHE Mingfan. Influence of Reinforced Particles on Chip Formation Process in Cutting SiCp/Al Metal Matrix Composites. Acta Armamentarii. 2019, 40(1): 208-218 https://doi.org/10.3969/j.issn.1000-1093.2019.01.024

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第40卷第1期
2019年1月兵工学报ACTA
ARMAMENTARIIVol.40No.1Jan.2019

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