Surface and subsurface damage mechanisms in tangential ultrasonic-assisted grinding of ZrO2 ceramics

YAN Yanyan; ZHANG Yafei; ZHANG Zhaoqing

doi:10.7527/S1000-6893.2020.24749

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 7: 624749 - 624749

DOI: https://doi.org/10.7527/S1000-6893.2020.24749

Special Topic of Advanced Manufacturing Technology and Equipment

Surface and subsurface damage mechanisms in tangential ultrasonic-assisted grinding of ZrO₂ ceramics

YAN Yanyan ,
ZHANG Yafei ,
ZHANG Zhaoqing

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School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Received date: 2020-09-14

Revised date: 2020-10-09

Online published: 2020-12-14

Supported by

National Natural Science Foundation of China (51575163)

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Abstract

To further reveal the surface damage and subsurface damage mechanisms of hard-brittle materials in Tangential Ultrasonic-Assisted Grinding (TUAG), the dynamic mechanical properties of the hard-brittle materials during TUAG are analyzed based on the strain rate model. On this basis, the brittle-ductile transition’s critical cutting depth and the crack depth for hard-brittle materials in TUAG are obtained. The study found that the critical cutting depth and the crack depth are related to the strain rate. The critical cutting depth increases with the increase of the strain rate, and both the transverse crack depth and the median crack depth decrease with the increase of strain rate. Grinding test of ZrO₂ ceramics was conducted to verify the theoretical analysis. The test results show that due to the introduction of tangential ultrasonic vibration,the strain rate of the material increases, which then improves the dynamic fracture stress and dynamic fracture toughness of the material. As a result, the plastic removal range of ZrO₂ ceramics was increased, the depth of transverse crack and mediate crack were reduced, and the surface and subsurface quality of ZrO₂ ceramics was significantly improved. The test results are consistent with the theoretical analysis. This study provides a theoretical reference for further revelation of the surface and subsurface damage mechanisms of hard-brittle materials in TUAG.

Key words： Tangential Ultrasonic-Assisted Grinding (TUAG); strain rate; brittle-ductile transition’s critical cutting depth; surface damage; subsurface damage

Cite this article

YAN Yanyan , ZHANG Yafei , ZHANG Zhaoqing . Surface and subsurface damage mechanisms in tangential ultrasonic-assisted grinding of ZrO₂ ceramics[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(7) : 624749 -624749 . DOI: 10.7527/S1000-6893.2020.24749

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