Analysis of crack resistance and quality of thin coatings by Acoustic Emission

Through a set of electro-hydraulic digital valve as the core of the fuzzy control system to provide an appropriate amount of cooling fluid, the hard turning process temperature can be controlled at any set temperature. The use of the signal acquisition system based on virtual instrument, acquisition acoustic emission signals, vibration signals and temperature signals during the hard turning process. The temperature signal is processed by wavelet transform ,after vibration and acoustic emission signals be processed by wavelet packet decomposition and energy method, it is found that through providing appropriate cooling fluid can control temperatures in the processing and decrease the amplitude of vibration and acoustic emission signal, it also means that we can improve the quality of processing, and prolong the life of tool.

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Phase synchronization of slip in laboratory slider system

Nonlinear Processes in Geophysics ◽

10.5194/npg-12-163-2005 ◽

2005 ◽

Vol 12 (2) ◽

pp. 163-170 ◽

Cited By ~ 17

Author(s):

T. Chelidze ◽

T. Matcharashvili ◽

J. Gogiashvili ◽

O. Lursmanashvili ◽

M. Devidze

Keyword(s):

Acoustic Emission ◽

Applied Field ◽

Quantitative Assessment ◽

Phase Synchronization ◽

Recurrence Quantification Analysis ◽

Excitation Intensity ◽

Recurrence Quantification ◽

Quantification Analysis ◽

Phase Differences

Abstract. In the present study the character of slip regimes in laboratory spring-slider system under weak external periodical forcing has been investigated. We report the experimental evidence of phase synchronization (PS) in a slip dynamics, induced by the external periodic electromagnetic (EM) impact. The quality of synchronization depends on the intensity and frequency of the applied field; the corresponding Arnold's tongue region is constructed. Application of special techniques (measuring phase differences, phase diffusion coefficient, Shannon entropy, Recurrence Quantification Analysis) allows quantitative assessment of the strength of synchronization of microslips with EM impact. It is also shown that the character of power law relationship in acoustic emission amplitude (energy) distribution also undergoes significant changes at changing excitation intensity.

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ANALYSIS OF EFFECTS OF EXTERNAL RESTRAINT ON CRACK RESISTANCE OF BLAST FURNACE SLAG CONCRETE BY ACOUSTIC EMISSION METHOD

Cement Science and Concrete Technology ◽

10.14250/cement.65.290 ◽

2011 ◽

Vol 65 (1) ◽

pp. 290-297

Author(s):

Akira HOSODA ◽

Tomoaki TAKAHASHI ◽

HA Ngoc Son

Keyword(s):

Acoustic Emission ◽

Blast Furnace ◽

Crack Resistance ◽

Blast Furnace Slag ◽

Acoustic Emission Method ◽

Emission Method ◽

Furnace Slag

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Acoustic-emission evaluation of the quality of bimetallic rims of rock-crushing disks

Materials Science ◽

10.1007/bf02539074 ◽

1996 ◽

Vol 32 (5) ◽

pp. 604-613

Author(s):

V. R. Skal's'kyi

Keyword(s):

Acoustic Emission

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Evaluation of AlTiCrN Coatings Surface after Tribological Tests

Materials Science Forum ◽

10.4028/www.scientific.net/msf.818.49 ◽

2015 ◽

Vol 818 ◽

pp. 49-52

Author(s):

Janette Brezinová ◽

Dagmar Jakubéczyová ◽

Mariana Landová

Keyword(s):

Tungsten Carbide ◽

Experimental Work ◽

Cutting Tools ◽

Tribological Test ◽

Thin Coatings ◽

Tribological Tests ◽

Pin On Disc

The article deals with the issue of evaluation of thin coatings for coating of cutting tools in order to increase their lifetime at higher temperatures. The aim of the experimental work was to determine the quality of two types of coatings - AlTiNmulti and AlTiCrN. The coatings were applied to the material Böhler 190 Microclean using PLATIT PL1001 Compact device at temperature of 430°C and pressure of 0,020 mbar. To determine the quality of coatings tribological test Pin-on-Disc was used, the counterpart was made of tungsten carbide (WC). Outputs of measurements were evaluated in Sensomp, which evaluates the results obtained from measurements using microscope PLu Noex. The results of the tests show that the AlTiNmulti coating is most suitable for use in environments with higher temperatures.

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