Observation of cross-section surface after cutting of CFRP with UV laser

2013 ◽  
Author(s):  
Tatsuya Nariyama ◽  
Kazuki Nakai ◽  
Masahiro Tsukamoto ◽  
Yuji Sato ◽  
Shinichiro Masuno ◽  
...  
Keyword(s):  
Cross Section ◽  
Uv Laser ◽  
Section Surface

Cross Section Analysis of Cu Filled TSVs Based on High Throughput Plasma-FIB Milling

2012 ◽  
Author(s):  
Frank Altmann ◽  
Jens Beyersdorfer ◽  
Jan Schischka ◽  
Michael Krause ◽  
German Franz ◽  
...  
Keyword(s):  
High Resolution ◽  
Cross Section ◽  
High Throughput ◽  
Cross Sections ◽  
Electron Backscatter Diffraction ◽  
Grain Structure ◽  
Electron Backscatter ◽  
Section Surface ◽  
Backscatter Diffraction ◽  
Section Analysis

Abstract In this paper the new Vion™ Plasma-FIB system, developed by FEI, is evaluated for cross sectioning of Cu filled Through Silicon Via (TSV) interconnects. The aim of the study presented in this paper is to evaluate and optimise different Plasma-FIB (P-FIB) milling strategies in terms of performance and cross section surface quality. The sufficient preservation of microstructures within cross sections is crucial for subsequent Electron Backscatter Diffraction (EBSD) grain structure analyses and a high resolution interface characterisation by TEM.

scholarly journals Experimental Evidence of Specimen-Size Effects on EN-AW6082 Aluminum Alloy in VHCF Regime

2021 ◽  
Vol 11 (9) ◽  
pp. 4272
Author(s):  
Stefano Invernizzi ◽  
Francesco Montagnoli ◽  
Alberto Carpinteri
Keyword(s):  
Aluminium Alloy ◽  
Cross Section ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Experimental Tests ◽  
Theoretical Explanation ◽  
Specimen Size ◽  
Section Surface ◽  
Middle Cross Section ◽  
Ultrasonic Fatigue

The present paper investigates the influence of the specimen size of EN-AW6082 wrought aluminium alloy subjected to very high cycle fatigue (VHCF) tests. The hourglass specimens were tested under fully reversed loading condition, up to 109 cycles, by means of the ultrasonic fatigue testing machine developed by Italsigma® (Italy). Three specimens groups were considered, with a diameter in the middle cross-section ranging from 3 mm up to 12 mm. The stress field in the specimens was determined numerically and by strain gauge measurements in correspondence of the cross-section surface. The dispersion of experimental results has been accounted for, and data are reported in P-S-N diagrams. The decrease in fatigue resistance with increasing specimen size is evident. Theoretical explanation for the observed specimen-size effect is provided, based on Fractal Geometry concepts, allowing to obtain scale independent P-S*-N curves. The fatigue life expectation in the VHCF regime of the EN-AW6082 aluminium alloy full-scale components is rather overestimated if it is assessed only from standard small specimens of 3 mm in diameter. Experimental tests carried out on larger specimens, and a proper extrapolation, are required to assure safe structural design.

Nano-Imprint Patterning of Nanowire Structures for Interconnect Study

2005 ◽  
Author(s):  
Bin Li ◽  
Anastassios Mavrokefalos ◽  
Jianhua Zhou ◽  
Li Shi ◽  
Paul S. Ho ◽  
...  
Keyword(s):  
Electron Beam ◽  
Cross Section ◽  
Silicon Nanowires ◽  
Size Effects ◽  
Silicon On Insulator ◽  
Si Nanowires ◽  
Section Surface ◽  
Etching Mask ◽  
Interconnect Lines ◽  
Nano Imprint

A thermal nano-imprint method has been developed to pattern sub-40 nm polymer lines of Hydrogensilsesquioxane (HSQ) and electron beam resist ZEP 520A. The imprint template was the cross section surface of a selectively etched GaAs/AlGaAs heterostructure wafer. Silicon nanowires were formed using reactive ion etching (RIE) of a silicon-on-insulator wafer with the polymer nanolines as an etching mask. The obtained Si nanowires were well defined and continuous for a length up to hundreds of microns. Reaction of the silicon lines with a metal can lead to the formation of silicide interconnect lines, which is used to investigate the size effects on the transport and electromigration properties of interconnects for future microelectronics.

The Fluctuational Model of Small Floating Objects Identification by Means of Passive Radar Reflectors

2013 ◽  
Vol 196 ◽  
pp. 88-94
Author(s):  
Józef Lisowski ◽  
Andrzej Szklarski
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Probability Of Detection ◽  
Passive Radar ◽  
Section Surface ◽  
Objects Detection ◽  
Floating Objects ◽  
Fluctuation Model

The paper presents the issues related to the probability of surface objects detection. The classical fluctuation models and the new fluctuation model for small floating objects with 10 m2 radar cross section surface are described. The possibilities of detection of examined passive radar reflectors by the radars on board merchant vessels were determined. Probability of detection of passive radar reflectors calculated using the classical fluctuation models was compared with the results obtained using the proposed new fluctuation model.

scholarly journals Experimental Evidence of Specimen-Size Effects on EN-AW6082 Aluminum Alloy in VHCF Regime

2021 ◽  
Author(s):  
Stefano Invernizzi ◽  
Francesco Montagnoli ◽  
Alberto Carpinteri
Keyword(s):  
Aluminium Alloy ◽  
Cross Section ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Experimental Tests ◽  
Theoretical Explanation ◽  
Specimen Size ◽  
Section Surface ◽  
Middle Cross Section ◽  
Ultrasonic Fatigue

The present paper investigates the influence of the specimen size of EN-AW6082 wrought aluminium alloy subjected to very high cycle fatigue (VHCF) tests. The hourglass specimens were tested under fully reversed loading condition, up to 10^9 cycles, by means of the ultrasonic fatigue testing machine developed by Italsigma® (Italy). Three specimens groups were considered, with a diameter in the middle cross-section ranging from 3 mm up to 12 mm. The stress field in the specimens was determined numerically and by strain gauge measurements in correspondence of the cross-section surface. The dispersion of experimental results has been accounted for, and data are reported in P-S-N diagrams. The decrease in fatigue resistance with increasing specimen size is evident. Theoretical explanation for the observed specimen-size effect is provided, based on Fractal Geometry concepts, allowing to obtain scale independent P-S*-N curves. The fatigue life expectation in the VHCF regime of the EN-AW6082 aluminium alloy full-scale components is rather overestimated if it is assessed only from standard small specimens of 3 mm in diameter. Experimental tests carried out on larger specimen, and a proper extrapolation, are required to assure safe structural design.

Turbine Blade CNC Machining Simulation Analysis Based on MATLAB and UG

2014 ◽  
Vol 1061-1062 ◽  
pp. 837-840
Author(s):  
Jing Na Yang ◽  
Ri Xin Bai ◽  
Li Qin Dong ◽  
Zhi Hong Liu ◽  
Xin Jing Jiao
Keyword(s):  
Turbine Blade ◽  
Cross Section ◽  
Simulation Analysis ◽  
Variable Cross Section ◽  
Nc Machining ◽  
Cnc Machining ◽  
Variable Cross ◽  
Machining Simulation ◽  
Section Surface ◽  
Modeling Theory

As a key component of turbine, the surface of turbine blade is usually designed to distorted variable cross-section surface, and the shape is very complex. This paper combines NURBS modeling theory and NC machining method, and use NC machining trajectory generation and simulation analysis by means of UG software. The results show that the method is effective for blade processing, and have a guiding role to the industrial production.

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