scholarly journals Research on chip formation mechanism and surface morphology of particle-reinforced metal matrix composites

2021 ◽  
Author(s):  
Yuxin Fang ◽  
Youqiang Wang ◽  
Ping Zhang ◽  
Heng Luo
Keyword(s):  
Surface Morphology ◽  
Metal Matrix Composites ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Chip Formation Mechanism ◽  
On Chip

Study of Chip Morphology and Chip Formation Mechanism During Machining of Magnesium-Based Metal Matrix Composites

2017 ◽  
Author(s):  
Brian Davis ◽  
David Dabrow ◽  
Licheng Ju ◽  
Anhai Li ◽  
Chengying Xu ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Metal Matrix ◽  
Cutting Speed ◽  
Chip Morphology ◽  
Matrix Composites ◽  
Particle Type ◽  
Chip Formation Mechanism ◽  
Cutting Speeds

Magnesium (Mg) and its alloys are among the lightest metallic structural materials, making them very attractive for use in the aerospace and automotive industries. Recently, Mg has been used in metal matrix composites (MMCs), demonstrating significant improvements in mechanical performance. However, the machinability of Mg-based MMCs is still largely elusive. In this study, Mg-based MMCs are machined using a wide range of cutting speeds in order to elucidate both the chip morphology and chip formation mechanism. Cutting speed is found to have the most significant influence on both the chip morphology and chip formation mechanism, with the propensity of discontinuous, particle-type chip formation increasing as the cutting speed increases. Saw-tooth chips are found to be the primary chip morphology at low cutting speeds (lower than 0.5 m/s), while discontinuous, particle-type chips prevail at high cutting speeds (higher than 1.0 m/s). Using in situ high speed imaging, the formation of the saw-tooth chip morphology is found to be due to crack initiation at the free surface. However, as the cutting speed (and strain rate) increases, the formation of the discontinuous, particle-type chip morphology is found to be due to crack initiation at the tool tip. In addition, the influences of tool rake angle, particle size, and particle volume fracture are investigated and found to have little effect on the chip morphology and chip formation mechanism.

Study of Chip Morphology and Chip Formation Mechanism During Machining of Magnesium-Based Metal Matrix Composites

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Brian Davis ◽  
David Dabrow ◽  
Licheng Ju ◽  
Anhai Li ◽  
Chengying Xu ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Metal Matrix ◽  
Cutting Speed ◽  
Chip Morphology ◽  
Matrix Composites ◽  
Particle Type ◽  
Chip Formation Mechanism ◽  
Cutting Speeds

Magnesium (Mg) and its alloys are among the lightest metallic structural materials, making them very attractive for use in the aerospace and automotive industries. Recently, Mg has been used in metal matrix composites (MMCs), demonstrating significant improvements in mechanical performance. However, the machinability of Mg-based MMCs is still largely elusive. In this study, Mg-based MMCs are machined using a wide range of cutting speeds in order to elucidate both the chip morphology and chip formation mechanism. Cutting speed is found to have the most significant influence on both the chip morphology and chip formation mechanism, with the propensity of discontinuous, particle-type chip formation increasing as the cutting speed increases. Saw-tooth chips are found to be the primary chip morphology at low cutting speeds (lower than 0.5 m/s), while discontinuous, particle-type chips prevail at high cutting speeds (higher than 1.0 m/s). Using in situ high-speed imaging, the formation of the saw-tooth chip morphology is found to be due to crack initiation at the free surface. However, as the cutting speed (and strain rate) increases, the formation of the discontinuous, particle-type chip morphology is found to be due to crack initiation at the tool tip. In addition, the influences of tool rake angle, particle size, and particle volume fracture are investigated and found to have little effect on the chip morphology and chip formation mechanism.

Formation Mechanism of WCp/Ti-6Al-4V Graded Metal Matrix Composites Layer Produced by Laser Melt Injection

2008 ◽  
Vol 35 (11) ◽  
pp. 1718-1722 ◽  
Author(s):  
陈彦宾 Chen Yanbin ◽  
刘德健 Liu Dejian ◽  
李俐群 Li Liqun ◽  
李福泉 Li Fuquan ◽  
陈树海 Chen Shuhai
Keyword(s):  
Metal Matrix Composites ◽  
Formation Mechanism ◽  
Metal Matrix ◽  
Matrix Composites

Research on Chip Formation Mechanism of Laser-Assisted Machining of Fused Silica Based on Variable Laser Angle

2020 ◽  
Author(s):  
Pengfei Pan ◽  
Huawei Song ◽  
Junfeng Xiao ◽  
Zuohui Yang ◽  
Guoqi Ren ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Chip Formation ◽  
Incident Angle ◽  
Chip Morphology ◽  
Fused Silica ◽  
Machining Process ◽  
Laser Assisted Machining ◽  
Chip Formation Mechanism ◽  
On Chip ◽  
Cutting Model

Abstract Laser-assisted machining (LAM) is a promising technology for improving the machinability of hard-to-cut materials. In this study, based on the finite element method (FEM), a cutting model of thermally coupled non-uniform temperature field is established. The chip formation mechanism of fused silica during the laser-assisted machining process is explored from the aspects of laser power and laser incident angle. The results show that as the laser incident angle increases, the continuity of the chip increases gradually. An annular tool holder that can adjust the angle between the laser beam and the tool was designed. And the similar chip morphology obtained by variable-angle cutting experiments verified the effectiveness of the cutting model. Moreover, fracture chips and continuous banded chips are found in both simulation and experiment, which implies that the cutting mechanism works under a hybrid mode of brittle fracture and plastic deformation in the LAM process.

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