High precision laser drilling with ultra short pulses – Fundamental aspects and technical applications

2006 ◽  
Author(s):  
Christian Föhl ◽  
Friedrich Dausinger
Keyword(s):  
High Precision ◽  
Laser Drilling ◽  
Short Pulses

1μm adjustment-tolerance for high-precision helical laser drilling

2015 ◽  
Author(s):  
F. Zibner ◽  
C. Fornaroli ◽  
J. Holtkamp ◽  
J. Ryll ◽  
A. Gillner
Keyword(s):  
High Precision ◽  
Laser Drilling

The Influence of Laser Drilling Process on the Microstructural Changes of Nickel Based Superalloy

2018 ◽  
Vol 1146 ◽  
pp. 134-141
Author(s):  
Sanja Petronić ◽  
Andjelka Milosavljevic ◽  
Meri Burzić ◽  
Olivera Eric-Cekic ◽  
Suzana Polic ◽  
...  
Keyword(s):  
Heat Affected Zone ◽  
Laser Drilling ◽  
Drilling Process ◽  
Short Pulses ◽  
Microstructural Changes ◽  
Geometrical Characteristics ◽  
Nickel Based Superalloy ◽  
Nd:Yag Lasers ◽  
Corrosion And Oxidation ◽  
Very Short Pulses

Nimonic 263 is an alloy with superior mechanical strength and creep resistance at high temperatures and pressure, good formability, and corrosion and oxidation resistance. Due to their high beam density and very short pulses which reduces the heat affected zone (HAZ) Nd:YAG lasers are very suitable for materials drilling. In this paper, the Nimonic 263 sheets, thickness of 2 mm, are laser drilled with various parameters. The influence of laser drilling process on microstructural changes along with the geometrical characteristics are analysed and discussed.

Aerodynamic window for high precision laser drilling

2006 ◽  
Author(s):  
Steffen Sommer ◽  
Friedrich Dausinger ◽  
Peter Berger ◽  
Helmuth Hügel
Keyword(s):  
High Precision ◽  
Laser Drilling

Modeling and investigation of melt ejection dynamics for laser drilling with short pulses

2003 ◽  
Author(s):  
Andreas Ruf ◽  
Detlef Breitling ◽  
Peter Berger ◽  
Friedrich Dausinger ◽  
Helmut Huegel
Keyword(s):  
Laser Drilling ◽  
Short Pulses ◽  
Melt Ejection

New Approach to enhance the accuracy of ECM High-precision Short Pulses ECM (HSPECM)

2004 ◽  
Vol 149 (1-3) ◽  
pp. 382-383 ◽  
Author(s):  
J.Y Wang ◽  
A De Silva ◽  
Yu Yanqing ◽  
Han Guangjun
Keyword(s):  
High Precision ◽  
Short Pulses ◽  
New Approach

Automatic measurement of SAED patterns from asbestos minerals

1988 ◽  
Vol 46 ◽  
pp. 846-847
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
High Precision ◽  
Diffraction Data ◽  
Automatic Measurement ◽  
Automatic Method ◽  
Important Method ◽  
X Ray ◽  
Integrated Intensity ◽  
Asbestiform Minerals ◽  
True Center

Conventional SAD patterns as obtained in the TEM present difficulties for identification of materials such as asbestiform minerals, although diffraction data is considered to be an important method for making this purpose. The preferred orientation of the fibers and the spotty patterns that are obtained do not readily lend themselves to measurement of the integrated intensity values for each d-spacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. We have implemented an automatic method for diffraction pattern measurement to overcome these problems. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring. The resulting spectrum of intensity vs. radius is then used just as a conventional X-ray diffractometer scan would be, to locate peaks and produce a list of d,I values suitable for search/match comparison to known or expected phases.

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