Effects of Crystallographic Structure on Machining Performance with Polycrystalline Oxygen Free Copper by a Single Crystalline Diamond Micro-Tool

Abstract:

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A study was carried out to investigate effects of crystallographic structure on the machining performance with polycrystalline oxygen free copper (OFC) using a single crystalline diamond (SCD) micro-tool. The SCD micro-tool used in this study fabricated with a focused ion beam (FIB) has a cutting length of around 30 µm on the primary clearance face. It was found that a change in crystallographic orientation resulted in a variation in machining force, chip thickness and shear angle, leading to a change in machined surface integrity. When a micro-size tool traverses within a grain at a machining direction aligned with a particular crystallographic orientation, the work material in front of the machining tool is found to be severely deformed. If the orientation changes to a less favorable orientation, this may lead to a much reduced shear angle, a thicker chip, striation at the chip back, higher machining forces and a degraded machined surface. This study contributes to the understanding of the physics of micro scale mechanical machining (micro-machining).

Info:

Periodical:

Key Engineering Materials (Volumes 447-448)

Edited by:

Jianhong Zhao, Masanori Kunieda, Guilin Yang and Xue-Ming Yuan

Pages:

31-35

DOI:

10.4028/www.scientific.net/KEM.447-448.31

Citation:

X. Ding et al., "Effects of Crystallographic Structure on Machining Performance with Polycrystalline Oxygen Free Copper by a Single Crystalline Diamond Micro-Tool", Key Engineering Materials, Vols. 447-448, pp. 31-35, 2010

Online since:

September 2010

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Price:

$35.00

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