Material removal behavior in processing green Al                         2                         O                         3                          ceramics based on scratch and edge-indentation tests

Yayun Liu; Jianxin Deng; Hongzhi Yue; Ran Duan; Xuemu Li; Kornel Ehmann

doi:10.1016/j.ceramint.2019.03.185

Material removal behavior in processing green Al ₂ O ₃ ceramics based on scratch and edge-indentation tests

Yayun Liu, Jianxin Deng^*, Hongzhi Yue, Ran Duan, Xuemu Li, Kornel Ehmann

^*Corresponding author for this work

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

To understand material removal behavior in green ceramics processing, as one of the essential elements for improving processing quality, scratch and edge-indentation tests were performed to ascertain the material removal mode and to characterize the machined surfaces. The results revealed that scratch and edge-indentation tests provide new alternative methods to study the processing behaviors of green Al ₂ O ₃ ceramics. Prediction models for the depth of the scratch groove, and for the peak cutting forces corresponding to the depth of cut were formulated. It has been shown that the mode of green ceramic material removal is transgranular fracture consisting of a combination of ploughing and ductile cutting. Ploughing dominates under smaller depths of cut and larger scratch velocities, while ductile cutting dominates accompanied by limited brittle fracture under larger depths of cut and lower scratch velocities. Cracking appears under larger normal scratch forces and lower scratch velocities. It was also shown that a compaction layer always exists after machining the thickness of which increases with an increasing of the normal force.

Original language	English (US)
Pages (from-to)	12495-12508
Number of pages	14
Journal	Ceramics International
Volume	45
Issue number	9
DOIs	https://doi.org/10.1016/j.ceramint.2019.03.185
State	Published - Jun 15 2019

Funding

This work is supported by the National Natural Science Foundation of China ( 51675311 ), the Major Program of Shandong Province Natural Science Foundation ( ZR2018ZB0522 ), and the Development Plan of Science and Technology of Shandong Province ( 2017GGX30115 ). The support of the China Scholarship Council (CSC) is also gratefully acknowledged.

Keywords

Green ceramic
Machined surfaces
Material removal mode
Prediction models

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2019.03.185

Cite this

Liu, Y., Deng, J., Yue, H., Duan, R., Li, X., & Ehmann, K. (2019). Material removal behavior in processing green Al ₂ O ₃ ceramics based on scratch and edge-indentation tests Ceramics International, 45(9), 12495-12508. https://doi.org/10.1016/j.ceramint.2019.03.185

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title = " Material removal behavior in processing green Al 2 O 3 ceramics based on scratch and edge-indentation tests ",

abstract = " To understand material removal behavior in green ceramics processing, as one of the essential elements for improving processing quality, scratch and edge-indentation tests were performed to ascertain the material removal mode and to characterize the machined surfaces. The results revealed that scratch and edge-indentation tests provide new alternative methods to study the processing behaviors of green Al 2 O 3 ceramics. Prediction models for the depth of the scratch groove, and for the peak cutting forces corresponding to the depth of cut were formulated. It has been shown that the mode of green ceramic material removal is transgranular fracture consisting of a combination of ploughing and ductile cutting. Ploughing dominates under smaller depths of cut and larger scratch velocities, while ductile cutting dominates accompanied by limited brittle fracture under larger depths of cut and lower scratch velocities. Cracking appears under larger normal scratch forces and lower scratch velocities. It was also shown that a compaction layer always exists after machining the thickness of which increases with an increasing of the normal force.",

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author = "Yayun Liu and Jianxin Deng and Hongzhi Yue and Ran Duan and Xuemu Li and Kornel Ehmann",

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Liu, Y, Deng, J, Yue, H, Duan, R, Li, X & Ehmann, K 2019, ' Material removal behavior in processing green Al ₂ O ₃ ceramics based on scratch and edge-indentation tests ', Ceramics International, vol. 45, no. 9, pp. 12495-12508. https://doi.org/10.1016/j.ceramint.2019.03.185

Material removal behavior in processing green Al ₂ O ₃ ceramics based on scratch and edge-indentation tests . / Liu, Yayun; Deng, Jianxin; Yue, Hongzhi et al.
In: Ceramics International, Vol. 45, No. 9, 15.06.2019, p. 12495-12508.

Research output: Contribution to journal › Article › peer-review

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AU - Deng, Jianxin

AU - Yue, Hongzhi

AU - Duan, Ran

AU - Li, Xuemu

AU - Ehmann, Kornel

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N2 - To understand material removal behavior in green ceramics processing, as one of the essential elements for improving processing quality, scratch and edge-indentation tests were performed to ascertain the material removal mode and to characterize the machined surfaces. The results revealed that scratch and edge-indentation tests provide new alternative methods to study the processing behaviors of green Al 2 O 3 ceramics. Prediction models for the depth of the scratch groove, and for the peak cutting forces corresponding to the depth of cut were formulated. It has been shown that the mode of green ceramic material removal is transgranular fracture consisting of a combination of ploughing and ductile cutting. Ploughing dominates under smaller depths of cut and larger scratch velocities, while ductile cutting dominates accompanied by limited brittle fracture under larger depths of cut and lower scratch velocities. Cracking appears under larger normal scratch forces and lower scratch velocities. It was also shown that a compaction layer always exists after machining the thickness of which increases with an increasing of the normal force.

AB - To understand material removal behavior in green ceramics processing, as one of the essential elements for improving processing quality, scratch and edge-indentation tests were performed to ascertain the material removal mode and to characterize the machined surfaces. The results revealed that scratch and edge-indentation tests provide new alternative methods to study the processing behaviors of green Al 2 O 3 ceramics. Prediction models for the depth of the scratch groove, and for the peak cutting forces corresponding to the depth of cut were formulated. It has been shown that the mode of green ceramic material removal is transgranular fracture consisting of a combination of ploughing and ductile cutting. Ploughing dominates under smaller depths of cut and larger scratch velocities, while ductile cutting dominates accompanied by limited brittle fracture under larger depths of cut and lower scratch velocities. Cracking appears under larger normal scratch forces and lower scratch velocities. It was also shown that a compaction layer always exists after machining the thickness of which increases with an increasing of the normal force.

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Liu Y, Deng J, Yue H, Duan R, Li X, Ehmann K. Material removal behavior in processing green Al ₂ O ₃ ceramics based on scratch and edge-indentation tests Ceramics International. 2019 Jun 15;45(9):12495-12508. doi: 10.1016/j.ceramint.2019.03.185