无氧铜超精加工表面微观形貌的分形维数表征<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.03.009

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Abstract Nano-scale surface of low roughness can be obtained in single point diamond ultra-precision machining. Further experiments show that clear embossed grain boundary will appear on the machined surface filled with tool marks when annealed oxygen-free copper cut by single point diamond ultra-precision machining. Ultra-precision machined surface′s microtopography with embossed grain boundary can not be effectively characterized and distinguished with traditional concept of roughness. In this work, the concept of fractal dimension was introduced and yard stick method was used to calculate fractal dimension of surface microtopography of ultra-precision machined oxygen-free copper. In order to reduce interference of tool marks signal and extrude information of embossed grain boundary, band-stop filter method was designed. The results showed that the surface fractal dimension and embossed grain boundary could be obtained on the surface after ultra-precision machining, but due to the similar size scale, the difference could not be distinguished by traditional roughness measurement. By coupling band-stop filtering and yard stick method, the feature of embossed grain boundary could be effectively identified, and which could reflect the microscopic, characteristic information of ultra-precision machined surface′s topography quantitatively.

Key words： fractal dimension grain boundary step yard stick method band-stop filtering single point diamond turning

Published: 02 May 2018

CLC number:

TH161+.14

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	Articles by authors
	YANG Yang
	WANG Gang
	YU Jianchao
	ZHOU Tingting
	LI Yao
	SHUAI Maobing

Cite this article:

YANG Yang,WANG Gang,YU Jianchao, et al. Fractal Dimension Characterization on Surface Microtopography of Ultra-precision Machined Oxygen-free Copper[J]. Materials Reports, 2017, 31(3): 52-56.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.03.009 OR http://www.mater-rep.com/EN/Y2017/V31/I3/52

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