Atomic simulation of crystal orientation effect on coating surface generation mechanisms in cold spray

This paper proposes a novel integrated approach to the prediction of surface generation mechanisms which takes into account both cutting process outputs and distortions of the individual feed marks in comparison to an ideal kinematical model. For this task, the recorded surface roughness profile was decomposed using special algorithms. The mechanisms of real surface generation considered include the plastic side flow and spring back effects, the cutting edge sharpness and its wear, and dynamic interactions between the tool and the workpiece. The computation procedure was verified for different workpiece materials in conjunction with uncoated and coated, sharp and worn, tools.

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Research of Surface Generation Mechanisms in Single-Point Diamond Turning

Optics Design and Precision Manufacturing Technologies - Key Engineering Materials ◽

10.4028/0-87849-458-8.1296 ◽

2007 ◽

pp. 1296-1301

Author(s):

Chi Fai Cheung ◽

Wing Bun Lee ◽

S. To ◽

Ling Bao Kong

Keyword(s):

Single Point ◽

Diamond Turning ◽

Surface Generation ◽

Generation Mechanisms

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728 Crystal orientation effect of deformation localization and ductile fracture in FCC bi-crystal materials

The Proceedings of The Computational Mechanics Conference ◽

10.1299/jsmecmd.2011.24.223 ◽

2011 ◽

Vol 2011.24 (0) ◽

pp. 223-224

Author(s):

Setsuo MIURA ◽

Michiaki KOBAYASHI ◽

Jun-ichi SHIBANO ◽

Yoshiharu Ozaki

Keyword(s):

Ductile Fracture ◽

Crystal Orientation ◽

Orientation Effect ◽

Deformation Localization

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Photocarrier generation mechanisms in anthracene crystals under ultra-high vacuum

Australian Journal of Chemistry ◽

10.1071/ch9701571 ◽

1970 ◽

Vol 23 (8) ◽

pp. 1571 ◽

Cited By ~ 17

Author(s):

GR Johnston ◽

LE Lyons

Keyword(s):

Incident Light ◽

High Vacuum ◽

Ultra High Vacuum ◽

Surface Generation ◽

Generation Process ◽

Singlet Exciton ◽

Before And After ◽

Generation Mechanisms ◽

Theoretical Considerations ◽

Hole Generation

A detailed investigation of the transient photocurrents generated in anthracene single crystals has been undertaken. The variations of the measured currents with the wavelength and intensity of the incident light, the applied voltage, and the temperature of the crystal are given for crystals both before, and after, subjection to ultra-high vacuum. Removal of the surface by evaporation is seen to produce large changes in the observed photocurrents. A biphotonic generation process for both hole and electron currents at high light intensities is observed after prolonged evacuation. Theoretical considerations show this biphotonic process to be singlet-exciton/singlet-exciton collision annihilation with a rate constant of 1.8 x 10-18�0.5 m3/s. Surface generation of holes is shown to decrease upon evacuation and to grow on readmission of oxygen. After prolonged evacuation, the bi-excitonic mechanism for hole generation almost completely swamps the "extrinsic" generation at the surface. However, the electron current becomes predominantly monophotonic with evaporation of the surface.

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